LM5056, LM5056A www.ti.com SNVS827A–OCTOBER2012–REVISEDAPRIL2013 High-Voltage System Power Management Device with PMBus™ CheckforSamples:LM5056,LM5056A FEATURES APPLICATIONS 1 • InputVoltageRange:10Vto80V • ServerBackplaneSystems 2 • Real-TimeMonitoringofVIN,IIN,PIN,VOUT, • BaseStationPowerDistributionSystems andVAUXwith12-bitresolution,1-kHz • IndustrialTelemetryApplications samplingrate • TrueinputPowerMeasurementusing DESCRIPTION simultaneoussamplingofVinandIin The LM5056/LM5056A combines high-performance • RemoteTemperatureSensingwith analog and digital technology with a PMBus™ programmablewarningthresholds compliant SMBus™ and I2C interface to accurately measure the electrical operating conditions of • PowerMeasurementAccuracy systems connected to a backplane power bus. The – LM5056A:±1.75% LM5056/LM5056A continuously supplies real-time – LM5056:±2.25% power, voltage, current, temperature and fault data to the system management host via the SMBus • CurrentMeasurementAccuracy interface. – LM5056A:±1.25% The LM5056/LM5056A monitoring block computes – LM5056:±1.5% both the real time and average values of subsystem • VoltageMeasurementAccuracy:±1.0% operating parameters (VIN, IIN, PIN, VOUT) as well • AveragingofVIN,IIN,PIN,andVOUTwith as the peak power. Accurate power averaging is accomplished by averaging the product of the input ProgrammableIntervalRangingfrom0.001s voltage and current. A black-box (telemetry and fault to4s snapshot)functioncapturesandstorestelemetrydata • ProgrammableWARNandFAULTThresholds anddevicestatusintheeventofawarningorafault. withSMBANotification SPACER BETWEEN 2 COLUMN AND • Black-BoxCaptureofTelemetry APPLICATIONDIAGRAM MeasurementsandDeviceStatusTriggeredby WARNorFAULTCondition • I2C/SMBusInterfaceandPMBusCompliant CommandStructure 1 Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet. PMBusisatrademarkofTexasInstruments. 2 PRODUCTIONDATAinformationiscurrentasofpublicationdate. Copyright©2012–2013,TexasInstrumentsIncorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarilyincludetestingofallparameters.

LM5056, LM5056A SNVS827A–OCTOBER2012–REVISEDAPRIL2013 www.ti.com TYPICAL APPLICATION DIAGRAM RS LOAD +48V VIN VOUT VIN VIN_K SENSE OUT VAUX NC ADR2 DIODE NC ADR1 LM5056/LM5056A VREF MMBT3904 NC ADR0 CVREF SMBA SMBus SDAI Interface CL SDAO VDD 5.0V SCL DGND AGND CVDD 2 SubmitDocumentationFeedback Copyright©2012–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A www.ti.com SNVS827A–OCTOBER2012–REVISEDAPRIL2013 This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriateprecautions.Failuretoobserveproperhandlingandinstallationprocedurescancausedamage. ESDdamagecanrangefromsubtleperformancedegradationtocompletedevicefailure.Precisionintegratedcircuitsmaybemore susceptibletodamagebecauseverysmallparametricchangescouldcausethedevicenottomeetitspublishedspecifications. ABSOLUTE MAXIMUM RATINGS overoperatingfree-airtemperaturerange(unlessotherwisenoted)(1) VALUE UNIT VIN,VIN_K,SENSE,OUTtoAGND/DGND -0.3to100 SMBA,SCL,SDAI,SDAO,CL,ADR0,ADR1,ADR2,VDD,VAUX,DIODEtoAGND/DGND -0.3to6.0 V VINtoVIN_K,AGNDtoDGND -0.3to0.3 VIN_KtoSENSE -3.0to3.0 HBM HumanbodymodelESDrating(2) 2.0 kV T Storagetemperature -65to150 STG °C T Junctiontemperature 150 J (1) AbsoluteMaximumRatingsindicatelimitsbeyondwhichdamagetothedevicemayoccur.Operatingratingsindicateconditionsfor whichthedeviceisintendedtobefunctional,butdonotensurespecificperformancelimits.Forensuredspecificationsandconditions seeElectricalCharacteristicsTable. (2) Thehumanbodymodelisa100-pFcapacitordischargedthrougha1.5-kΩresistorintoeachpin. RECOMMENDED OPERATING CONDITIONS overoperatingfree-airtemperaturerange(unlessotherwisenoted)(1) MIN NOM MAX UNIT VIN,VIN_K,SENSE,OUT 10 80 VDD 4.5 5.0 5.5 V VAUX 0 2.97 (1) AbsoluteMaximumRatingsindicatelimitsbeyondwhichdamagetothedevicemayoccur.Operatingratingsindicateconditionsfor whichthedeviceisintendedtobefunctional,butdonotensurespecificperformancelimits.Forensuredspecificationsandconditions seetheElectricalCharacteristicsTable. THERMAL INFORMATION LM5056 THERMALMETRIC(1) PWP UNITS 28PINS θ Junction-to-ambientthermalresistance(2) 35.6 JA θ Junction-to-case(top)thermalresistance(3) 19.9 JCtop θ Junction-to-boardthermalresistance(4) 16.8 JB °C/W ψ Junction-to-topcharacterizationparameter(5) 0.5 JT ψ Junction-to-boardcharacterizationparameter(6) 16.7 JB θ Junction-to-case(bottom)thermalresistance(7) 2.9 JCbot (1) Formoreinformationabouttraditionalandnewthermalmetrics,seetheICPackageThermalMetricsapplicationreport,SPRA953. (2) Thejunction-to-ambientthermalresistanceundernaturalconvectionisobtainedinasimulationonaJEDEC-standard,high-Kboard,as specifiedinJESD51-7,inanenvironmentdescribedinJESD51-2a. (3) Thejunction-to-case(top)thermalresistanceisobtainedbysimulatingacoldplatetestonthepackagetop.NospecificJEDEC- standardtestexists,butaclosedescriptioncanbefoundintheANSISEMIstandardG30-88. (4) Thejunction-to-boardthermalresistanceisobtainedbysimulatinginanenvironmentwitharingcoldplatefixturetocontrolthePCB temperature,asdescribedinJESD51-8. (5) Thejunction-to-topcharacterizationparameter,ψ ,estimatesthejunctiontemperatureofadeviceinarealsystemandisextracted JT fromthesimulationdataforobtainingθ ,usingaproceduredescribedinJESD51-2a(sections6and7). JA (6) Thejunction-to-boardcharacterizationparameter,ψ ,estimatesthejunctiontemperatureofadeviceinarealsystemandisextracted JB fromthesimulationdataforobtainingθ ,usingaproceduredescribedinJESD51-2a(sections6and7). JA (7) Thejunction-to-case(bottom)thermalresistanceisobtainedbysimulatingacoldplatetestontheexposed(power)pad.Nospecific JEDECstandardtestexists,butaclosedescriptioncanbefoundintheANSISEMIstandardG30-88. Spacer Copyright©2012–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 3 ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A SNVS827A–OCTOBER2012–REVISEDAPRIL2013 www.ti.com ELECTRICAL CHARACTERISTICS LimitsinstandardtypeareforT =25°Conly;limitsinboldfacetypeapplyoverthejunctiontemperature(T)rangeof-40°C J J to125°Cunlessotherwisestated.Minimumandmaximumlimitsareensuredthroughtest,design,orstatisticalcorrelation. TypicalvaluesrepresentthemostlikelyparametricnormatT =25°C,andareprovidedforreferencepurposesonly.Unless J otherwisestatedthefollowingconditionsapply:VIN=48VandVDD=5.0V.See (1)and(2). PARAMETER TESTCONDITIONS MIN TYP MAX UNIT Input(VINPin) I VINinputcurrent VIN=48V 0.9 1.4 mA VIN PoweronresetthresholdatVINtoenable POR VINincreasing 7.5 8.7 9.7 V EN allfunctions POR EN_HY POR hysteresis VINdecreasing 150 mV EN S VDDRegulator(VDDpin) VDD VDDpoweronresetvoltagethreshold VDDrising 3.0 3.8 4.5 V POR I VDDpininputcurrent VDD=5.5V 6.1 6.8 mA DD OUT,SENSE,VIN_K,VAUXPins I OUTbiascurrent OUT=VIN,normaloperation 79 90 OUT I SENSEbiascurrent SENSE=VIN,normaloperation 11 SENSE μA I VIN_Kbiascurrent VIN_K=VIN,normaloperation 110 VIN_K I VAUXHbiascurrent VAUX=2.97V 1.0 VAUX InternalReference V Referencevoltage I =0mA 2.94 2.97 3.0 V REF REF ADCandMUX ADC Resolution 12 bits RES INL Integralnon-linearity ADConly ±4 LSB t Acquisitionround-robintime Cycleallchannels 1 ms RR RemoteDiodeTemperatureSensor Temperatureaccuracyusinglocaldiode T =25°Cto85°C 2 °C A T ACC Remotedioderesolution 9 bits Highlevel 250 I Externaldiodecurrentsource μA DIODE Lowlevel 9.4 D Diodecurrentratio 25.9 RATIO (1) Currentoutofapinisindicatedasanegativevalue. (2) Alllimitsareensured.AllelectricalcharacteristicshavingroomtemperaturelimitsaretestedduringproductionatT =25°C.Allhotand A coldlimitsareensuredbycorrelatingtheelectricalcharacteristicstoprocessandtemperaturevariationsandapplyingstatisticalprocess control. 4 SubmitDocumentationFeedback Copyright©2012–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A www.ti.com SNVS827A–OCTOBER2012–REVISEDAPRIL2013 ELECTRICAL CHARACTERISTICS (continued) LimitsinstandardtypeareforT =25°Conly;limitsinboldfacetypeapplyoverthejunctiontemperature(T)rangeof-40°C J J to125°Cunlessotherwisestated.Minimumandmaximumlimitsareensuredthroughtest,design,orstatisticalcorrelation. TypicalvaluesrepresentthemostlikelyparametricnormatT =25°C,andareprovidedforreferencepurposesonly.Unless J otherwisestatedthefollowingconditionsapply:VIN=48VandVDD=5.0V.See(1)and(2). PARAMETER TESTCONDITIONS MIN TYP MAX UNIT TelemetryAccuracy CL=GND 54.4 IIN Currentinputfullscalerange mV FSR CL=VDD 27.0 13.3 CL=GND IIN CurrentinputLSB 0 μV LSB CL=VDD 6.70 2.96 VAUX VAUXinputfullscalerange V FSR 6 VAUX VAUXinputLSB 724 μV LSB VIN Inputvoltagefullscalerange 88.9 V FSR VIN InputvoltageLSB 21.7 mV LSB VIN_K–SENSE_K=22mV, CL=VDD(80%IIN ), -1.5 1.5 % FSR T =0°Cto85°C J VIN_K–SENSE_K=22mV, CL=VDD(80%IIN ),LM5056A -1.25 1.25 % FSR IINACC Inputcurrentaccuracy TJ=0°Cto85°C VIN_K–SENSE_K=5.5mV, -5.5 5.5 % CL=VDD(20%IIN ),T =0°Cto85°C FSR J VIN_K–SENSE_K=44mV, -3.5 3.5 % CL=GND(80%IIN ),T =0°Cto85°C FSR J VIN VINaccuracy VIN=48V,T =0°Cto85°C -1 1 % J VOUT VOUTaccuracy VOUT=48V,T =0°Cto85°C -1 1 % J VAUX VAUXaccuracy VAUX=2.8V,T =0°Cto85°C -1.3 1.3 % J VIN=48V, VIN_K–SENSE_K=22mV, -2.25 2.25 % CL=VDD,T =0°Cto85°C J VIN=48V, PIN Inputpoweraccuracy VIN_K–SENSE_K=22mV,LM5056A -1.75 1.75 % ACC CL=VDD,T =0°Cto85°C J VIN=48V, VIN_K–SENSE_K=44mV, -3.6 3.6 % CL=GND,T =0°Cto85°C J PMBusPinThresholds(SMBA,SDAI,SDAO,SCL) V SDAI,SCLinputlowvoltage 0.9 IL V SDAI,SCLinputhighvoltage 2.1 V IH V SDAOoutputlowvoltage I =3mA 0.4 OL SINK I Inputleakagecurrent SDAI,SMBA,SCL=5V 1 μA LEAK CLPin V Thresholdvoltage 3 V IH I Inputleakagecurrent CL=5V 10 μA LEAK Copyright©2012–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 5 ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A SNVS827A–OCTOBER2012–REVISEDAPRIL2013 www.ti.com TYPICAL CHARACTERISTICS Unlessotherwisespecifiedthefollowingconditionsapply:T =25°C,VIN,VIN_K,SENSE,andOUT=48VandVDD=5.0V. J Allgraphsshowjunctiontemperature. 1200 6 . 5 6 . 2 5 1100 µA) VIN = 80V mA) 6 nt ( 1000 nt ( 5 . 7 5 VDD = 5.5V urre 900 urre 5 . 5 C C ent 800 VIN = 48V ent 5 . 2 5 esc 700 esc 5 VDD = 5.0V Qui Qui 4 . 7 5 VIN 560000 VIN = 9V VDD 4 .4 2 . 55 VDD = 4.5V 400 4 -50 -25 0 25 50 75 100 125 150 – 5 0 – 2 5 0 2 5 5 0 7 5 1 0 0 1 2 5 1 5 0 -XQFWLRQ(cid:3)7HPSHUDWXUH(cid:3)(cid:11)(cid:219)&(cid:12) -XQFWLRQ(cid:3)7HPSHUDWXUH(cid:3)(cid:11)(cid:219)&(cid:12) C010 C001 Figure1.VINPinCurrent Figure2.VDDQuiescentCurrent 1 1 4 11.50 11.45 1 1 2 A) ent (µA) 1 1 0 urrent (µ 1111..3450 Curr 1 0 8 as C 11.30 s Bi 11.25 N_K Bia 1 0 6 SE Pin 11.20 VI EN 11.15 1 0 4 S 11.10 1 0 2 11.05 – 5 0 – 2 5 0 2 5 5 0 7 5 1 0 0 1 2 5 1 5 0 –50 –25 0 25 50 75 100 125 150 -XQFWLRQ(cid:3)7HPSHUDWXUH(cid:3)(cid:3)(cid:11)(cid:219)&(cid:12) -XQFWLRQ(cid:3)7HPSHUDWXUH(cid:3)(cid:3)(cid:3)(cid:11)(cid:219)&(cid:12) C002 C009 Figure3.VIN_KPinCurrent Figure4.SENSEPinCurrent 79.1 100 79.05 50 OUT Bias Current (µA) 77788877...887897..555899 AUX Bias Current (nA) ---211-050500000 78.7 V -250 78.65 78.6 -300 -50 -25 0 25 50 75 100 125 150 -50 -25 0 25 50 75 100 125 150 -XQFWLRQ(cid:3)7HPSHUDWXUH(cid:3)(cid:11)(cid:219)&(cid:12) -XQFWLRQ(cid:3)7HPSHUDWXUH(cid:3)(cid:11)(cid:219)&(cid:12) C011 C012 Figure5.OUTPinCurrent Figure6.VAUXPinCurrent(VAUX=2.97V) 6 SubmitDocumentationFeedback Copyright©2012–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A www.ti.com SNVS827A–OCTOBER2012–REVISEDAPRIL2013 TYPICAL CHARACTERISTICS (continued) Unlessotherwisespecifiedthefollowingconditionsapply:T =25°C,VIN,VIN_K,SENSE,andOUT=48VandVDD=5.0V. J Allgraphsshowjunctiontemperature. 2.973 0.10 0.08 2.972 0.06 V) ge ( 2.971 %) 0.04 olta 2.970 or ( 0.02 e V Err 0.00 nc 2.969 N –0.02 efere 2.968 VI –0.04 R –0.06 2.967 –0.08 2.966 –0.10 –50 –25 0 25 50 75 100 125 150 -50 -25 0 25 50 75 100 125 150 -XQFWLRQ(cid:3)7HPSHUDWXUH(cid:3)(cid:3)(cid:11)(cid:219)&(cid:12) -XQFWLRQ(cid:3)7HPSHUDWXUH(cid:3)(cid:3)(cid:11)(cid:219)&(cid:12) C008 C005 Figure7.VREFVoltage Figure8.VINMeasurementError 0.10 0.25 0.20 0.05 0.15 %) Error ( 0.00 or (%) 00..0150 Current –0.05 WER Err –00..0050 ut –0.10 PO –0.10 p n I –0.15 –0.15 –0.20 –0.20 –0.25 –50 –25 0 25 50 75 100 125 150 -50 -25 0 25 50 75 100 125 150 -XQFWLRQ(cid:3)7HPSHUDWXUH(cid:3)(cid:3)(cid:11)(cid:219)&(cid:12)(cid:3) -XQFWLRQ(cid:3)7HPSHUDWXUH(cid:3)(cid:3)(cid:11)(cid:219)&(cid:12) C007 C006 Figure9.IINMeasurementAccuracy Figure10.PINMeasurementError (VIN_K-SENSE=22mV) (VIN_K-SENSE=22mV) 0.10 0.10 0.08 0.08 0.06 0.06 %) 0.04 %) 0.04 or ( 0.02 or ( 0.02 Err 0.00 Err 0.00 UT –0.02 UX –0.02 O A V –0.04 V –0.04 –0.06 –0.06 –0.08 –0.08 –0.10 –0.10 -50 -25 0 25 50 75 100 125 150 -50 -25 0 25 50 75 100 125 150 -XQFWLRQ(cid:3)7HPSHUDWXUH(cid:3)(cid:11)(cid:219)&(cid:12)(cid:3) -XQFWLRQ(cid:3)7HPSHUDWXUH(cid:3)(cid:11)(cid:219)&(cid:12) C004 C003 Figure11.VOUTMeasurementError Figure12.VAUXMeasurmentError(VAUX=2.80V) Copyright©2012–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 7 ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A SNVS827A–OCTOBER2012–REVISEDAPRIL2013 www.ti.com DEVICE INFORMATION HTSSOPPackage 28Pin (TopView) OUT 1 28 NC NC 2 27 NC SENSE 3 26 NC VIN_K 4 25 NC Exposed VIN 5 24 NC Pad NC 6 23 NC NC 7 22 CL NC 8 21 VDD AGND 9 20 ADR0 DGND 10 19 ADR1 SDAI 11 18 ADR2 SDAO 12 17 VAUX SCL 13 16 DIODE SMBA 14 15 VREF TERMINALFUNCTIONS TERMINAL I/O DESCRIPTION NAME NO. ExposedPad Pad ExposedpadofHTSSOPpackage.Soldertothegroundplanetoreducethermalresistance. Outputvoltagetelemetryinput.TheOUTpinisanauxiliaryhigh-voltageinputtotheADC.Usethis OUT 1 I pintomeasuretheoutputvoltageorothersystemvoltagesupto80V. NC 2 - Noconnect.Notbondedtothedie.Canbeconnectedtothegroundplane. Negativeinputtothecurrentsenseamplifier.Thevoltageacrossthecurrentsenseresistor(R )is SENSE 3 I S measuredfromVIN_KtoSENSE. Positiveinputtothecurrentsenseamplifier.Thevoltageacrossthecurrentsenseresistor(R )is VIN_K 4 I S measuredfromVIN_KtoSENSE. Positivesupplyinput.VINistheinputsupplyconnectionforthedevice.Theinputvoltageis VIN 5 I measuredbetweenthispinandAGND.AsmallbypasscapacitorcanbeconnectedfromVINto AGND/DGNDinnoisyenvironments. NC 6 - Noconnect.Notbondedtothedie.Connecttothegroundplane. NC 7 - Noconnect.Notbondedtothedie.Connecttothegroundplane. NC 8 - Noconnect.Notbondedtothedie.Connecttothegroundplane. Analogground.Connectanaloggroundtodigitalgroundandthentoaquietsystemground.Besure AGND 9 - toavoidhighcurrentreturnpaths. Digitalground.Connectanaloggroundtodigitalgroundandthentoacleansystemground.Besure DGND 10 - toavoidhighcurrentreturnpaths. SMBusdatainput.DatainputpinforSMBus.ConnecttoSDAOiftheapplicationdoesnotrequire SDAI 11 I unidirectionalisolationdevices. SMBusdataoutput.DataoutputpinforSMBus.ConnecttoSDAIiftheapplicationdoesnotrequire SDAO 12 O unidirectionalisolationdevices. SCL 13 I SMBusclockinput.ClockpinforSMBus. SMBA 14 O SMBusalertline.AlertpinforSMBus,activelow. Internalvoltagereference.Internallygeneratedprecision2.97Vvoltagereferenceusedforanalogto VREF 15 O digitalconversion.Connecta1μFcapacitorfromthispintoAGNDforbypassing. Externaltemperaturediodepin.ConnectDIODEtoadiode-configuredMMBT3904NPNtransistor DIODE 16 O fortemperaturemonitoring.ThediodereturnpathshouldbeclosleycoupledwithAGND.Asmall bypasscapacitanceontheorderof1nFisrecommendedforextranoiseimmunity. Auxiliarylowvoltageinput.TheAuxiliarypinallowsvoltagetelemetryfromanexternalsource.Full VAUX 17 I scaleinputof2.966V. ADR2 18 I SMBUSaddressline2.Tri-stateaddressline.ShouldbeconnectedtoDGND,VDD,orleftfloating. 8 SubmitDocumentationFeedback Copyright©2012–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A www.ti.com SNVS827A–OCTOBER2012–REVISEDAPRIL2013 TERMINALFUNCTIONS(continued) TERMINAL I/O DESCRIPTION NAME NO. ADR1 19 I SMBUSaddressline1.Tri-stateaddressline.ShouldbeconnectedtoDGND,VDD,orleftfloating. ADR0 20 I SMBUSaddressline0.Tri-stateaddressline.ShouldbeconnectedtoDGND,VDD,orleftfloating. VDDinputtointernaldigitalcircuitry.Providea5.0-V(±10%allowable)voltagesupplytoVDDto VDD 21 I powertheinternaldigitalcircuitry.Connecta1μFcapacitoronthispintoAGNDforbypassing. Currentrangeselectpin.ConnectingthispintoVDDorDGNDselectsbetweenafull-scalecurrent CL 22 O sensevoltagerangeof27.0mVand54.4mVrespectively. NC 23 - Bondedtodiefortestingpurposes.Connecttothegroundplane. NC 24 - Bondedtodiefortestingpurposes.Connecttothegroundplane. NC 25 - Noconnect.Notbondedtothedie.Connecttothegroundplane. NC 26 - Noconnect.Notbondedtothedie.Connecttothegroundplane. NC 27 - Noconnect.Notbondedtothedie.Connecttothegroundplane. NC 28 - Noconnect.Notbondedtothedie.Connecttothegroundplane. Copyright©2012–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 9 ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A SNVS827A–OCTOBER2012–REVISEDAPRIL2013 www.ti.com FUNCTIONALBLOCKDIAGRAM S V E IN N O _ S U K E T 10V to 80V 0 V VIN ANALOG LM5056/LM5056A to 80 MEASUREMENT/ V 5.0V AVERAGING/ VDD DIGITAL WARN/ REGISTERS 1/30 SCL H 12bit X /S 1/30 SDAI VREF U ADC M SMBUS 2.97 V A TELEMETRY INTERFACE SDAO REF STATE MACHINE SMBA 0V – 2.966V VAUX ADDRESS DIODE DECODER DIODE TEMP SENSE ADR0 CL Cl = VDD, CURRENT SENSE FSR = 27.0 mV ADR1 Cl = GND, CURRENT SENSE FSR = 54.4 mV ADR2 AGND DGND 10 SubmitDocumentationFeedback Copyright©2012–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A www.ti.com SNVS827A–OCTOBER2012–REVISEDAPRIL2013 FUNCTIONAL DESCRIPTION The LM5056/LM5056A provides intelligent monitoring of the input voltage, output voltage, input current, input power, temperature, and an auxiliary input. The LM5056/LM5056A also provides a peak capture of the input power and programmable hardware averaging of the input voltage, current, power, temperature, and output voltage. Warning thresholds which trigger the SMBA pin may be programmed for input voltage, current, power, outputvoltage,andtemperatureviathePMBusinterface. Powering The LM5056/LM5056A The LM5056/LM5056A is enabled by increasing the input voltage on VIN above the POR threshold voltage, EN typically 8.7 V. There exists a VDD power on reset (VDD ) threshold on VDD of 3.8 V. The VDD threshold POR POR mustbesurpassedtoensurepropertelemetryreadings.VDDmustbepoweredexternallybya5Vpowersupply with an allowable tolerance of ±10%.The SMBus address of the LM5056/LM5056A is captured based on the states of the ADR0, ADR1, and ADR2 pins (GND, NC, VDD) during turn on and is latched into a volatile register once VDD has exceeded its POR threshold of 3.8 V. Reassigning or postponing the address capture is accomplished by holding the VREF pin to AGND. Pulling the VREF pin low also resets the logic and erases the volatile memory of the LM5056/LM5056A. Once released, the VREF pin charges up to its final value and the addressislatchedintoavolatileregisterwhenthevoltageattheVREFexceeds2.55V. VDD As mentioned in the previous paragraph, the LM5056/LM5056A VDD pin must be externally powered by a 5.0 V, ±10% supply. The required current is typically 6.1 mA. The pull-up voltage for the CL, ADR2, ADR1 and ADR0 pins should be the same as the voltage applied to VDD if they are to be tied high. It may also be used as the pull-up supply for the SMBus signals (SDAI/O, SCL, SMBA). It is recommended to connect a ceramic bypass capacitancehavingavalueof1μForgreaterasclosetotheVDDpinasthePCBlayoutallows. Remote Temperature Sensing The LM5056/LM5056A is designed to measure temperature remotely using an MMBT3904 NPN transistor. The base and collector of the MMBT3904 should be connected to the DIODE pin and the emitter to the LM5056/LM5056A AGND. Place the MMBT3904 near the device that requires temperature sensing. The temperature is measured by means of a change in the diode voltage in response to a step in current supplied by the DIODE pin. The DIODE pin sources a constant 9.4 µA but pulses 250 µA once every millisecond in order to measure the diode temperature. Care must be taken in the PCB layout to keep the parasitic resistance between the DIODE pin and the MMBT3904 low as to not degrade the measurement. Additionally, a small 1 nF bypass capacitorshouldbeplacedinparallelwiththeMMBT3904toreducetheeffectsofnoise.Thetemperaturecanbe read using the READ_TEMPERATURE_1 PMBus command (8Dh). The default limits of the LM5056/LM5056A causes SMBA pin to be pulled low if the measured temperature exceeds 150°C. These thresholds can be reprogrammed via the PMBus interface using the OT_WARN_LIMIT (51h) and OT_FAULT_LIMIT (4Fh) commands. If the temperature measurement and protection capability of the LM5056/LM5056A are not used, the DIODEpinshouldbeconnectedtothegroundplane. Erroneous temperature measurements may result when the device input voltage is below the minimum operating voltage(10V),duetoVREFdroppingoutbelowthenominalvoltage(2.97V). Copyright©2012–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 11 ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A SNVS827A–OCTOBER2012–REVISEDAPRIL2013 www.ti.com APPLICATION INFORMATION DESIGN-IN PROCEDURE Refer to Figure 13 for the Typical Application Circuit diagram. The following is the step-by-step procedure for hardware design of the LM5056/LM5056A. This procedure refers to section numbers that provide detailed informationonthefollowingdesignsteps.Therecommendeddesign-inprocedureisasfollows: RS LOAD +48V VIN VOUT CS CVIN VIN VIN_K SENSE OUT VAUX NC ADR2 DIODE NC ADR1 LM5056/ NC ADR0 LM5056A VREF CD MMBT3904 SMBA CVREF SMBus SDAI Interface CL SDAO VDD 5.0V SCL DGND AGND CVDD Figure13. TypicalApplicationCircuit CURRENT Range (Selecting R ) S The LM5056/LM5056A monitors the input current by measuring the voltage across the sense resistor (R ), S connectedfromVIN_KtoSENSE.Therequiredresistorvalueiscalculatedfrom: V R = S S I FS where • I istheexpectedfullscalecurrentandV isthecurrentsensevoltagerangebasedonthecurrentselect FS S rangesetting(CL). (1) If the voltage across R reaches V , the current measurement reaches the full-scale measurement. As S S mentioned before, it is important to limit the current to the full-scale reading. While there is internal circuitry intended to maintain the integrity of the other readings in the telemetry, the ADC and MUX are shared so overranginganinputmaycompromisetheintegrityoftheotherreadings. V can be set to either 27.0 mV or 54.4 mV through software commands or the CL pin. This setting defaults to S the sense voltage set at the CL pin during start-up. The value can be set via the PMBus with the DEVICE_SETUP(D9h)command,whichdefaultstothe27.0mVsetting.Oncethefullscalecurrent,I isknown FS andtheV rangeischosen,thesenseresistorcanbecalculated.Themaximumloadcurrentinnormaloperation S canbeusedtodeterminetherequiredpowerratingforthesenseresistorR . S Connections from R to the LM5056/LM5056A should be made using Kelvin techniques. In the suggested layout S of Figure 14 the small pads at the lower corners of the sense resistor connect only to the sense resistor terminals, and not to the traces carrying the high current. With this technique, only the voltage across the sense resistorisappliedtoVIN_KandSENSE,eliminatingthevoltagedropacrossthehigh-currentsolderconnections. 12 SubmitDocumentationFeedback Copyright©2012–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A www.ti.com SNVS827A–OCTOBER2012–REVISEDAPRIL2013 HIGH CURRENT PATH FROM SYSTEM INPUT VOLTAGE SENSE TO LOAD RESISTOR RS VIN VIN_K SENSE Figure14. SenseResistorConnections,EdgeSensed If the PCB layout and resistor pads allow for it, the connection shown in Figure 15 gives optimal kelvin sensing performance. HIGH CURRENTPATH SENSE RESISTOR FROM SYSTEM RS TO LOAD INPUTVOLTAGE VIN VIN_K SENSE Figure15. SenseResistorConnections,CenteredSensed C , C , C , C , and C VIN D VREF S VDD Using ceramic bypass capacitors can improve performance in noise heavy environments. Not every pin of the LM5056/LM5056Aisthesamewhenitcomestoplacingbypasscapacitors. • C : This capacitor is not required but can improve VIN telemetry performance in noisy situations. Typical VIN values for the VIN bypass capacitor can range from 1 nF to 100 nF to effectivly reduce input noise. The voltageonC ishigh,soa100Vorhighervoltagecapacitorwillwork. VIN • C :The C capacitor is recommended if the diode is placed far from the LM5056/LM5056A DIODE pin. Too D D large of a capacitance will corrupt the voltage waveform across the diode used to measure the absolute temperature. A typical value of capacitance for C is 1 nF. The voltage on C is low, so a 6.3 V or higher D D voltagecapacitorwillwork. • C : C is required since it is placed on the output of the internal votlage reference. This capacitor VREF VREF shouldbea1μFceramic.ThevoltageonC islow,soa6.3Vorhighervoltagecapacitorwillwork. VREF • C : The current sense amplifier is designed to amplifiy small voltages. Using a bypass capacitor across the S current sense amplifier input pins (VIN_K and SENSE) will facilitate accurate current telemetry. Functional values of C can range from 10 nF to 1 μF. The voltage on C is low, so a 6.3 V or higher voltage capacitor S S willwork. • C : C is required because it provides bypassing from the 5.0 V rail for the internal digital circuitry. This VDD VDD capacitor should be a 1-μF ceramic. The voltage on C is low, so a 6.3 V or higher voltage capacitor will VDD work. Copyright©2012–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 13 ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A SNVS827A–OCTOBER2012–REVISEDAPRIL2013 www.ti.com PC Board Guidelines ThefollowingguidelinesshouldbefollowedwhendesigningthePCboardfortheLM5056/LM5056A: • Placea1-μFceramiccapacitorascloseaspossibletoVREFpinandAGND. • Placea1-μFceramiccapacitorascloseaspossibletoVDDpinandAGND. • Minimize the inductance between the VIN and VIN_K pins. There are anti-parallel diodes between these pins so any voltage greater than 0.3 V in either polarity causes significant current flow through the diodes, which canresultindevicefailure.Donotplaceanyresistorsbetweenthesetwonodes. • Minimize the voltage between the VIN_K and SENSE pins. There are anti-parallel diodes between these pins so any voltage greater than 3.0 V in either polarity causes significant current flow through the diodes. Internal series resistors limit the current in these pins and provide a limited level of protection in the event of a voltage transient. • The sense resistor (R ) should be placed close to the LM5056/LM5056A. Connect R using the Kelvin S S techniquesshowninFigure14orFigure15. • The high-current path from the board’s input to the load and the return path, should be parallel and close to eachothertominimizeloopinductance. • The AGND and DGND connections should be connected at the pins of the device. The return connections for the various components around the LM5056/LM5056A should be connected directly to each other, and to the LM5056/LM5056A’s DGND and AGND pin connections, and then connected to the system ground at one point.Donotconnectthevariouscomponentreturnpadstoeachotherthroughthehighcurrentgroundline. 14 SubmitDocumentationFeedback Copyright©2012–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A www.ti.com SNVS827A–OCTOBER2012–REVISEDAPRIL2013 Applications Circuit Power,voltage,current,fault,temperature,andLEDluminositytelemetryforLEDstreetlamps. ATo thermal sensorterminalsB High Power LED Arrays MMBT3904Temperature Sensor Luminosity Sensor NTC thermistor couple to LED arrays Q2 Q3 Q4 RRISNS3ISNS4 GNDPGNDPGND Q1 RISNS2 NDP RISNS1 PG ENVINOutPDR1VLedFBDR2CDHCDR3DR4FAULT_CAPGD1SE1 GD2VDHCSE2DIMGD3FaultbSE3 GD4SE4VCCLM5056/LM5056AThermal DMIN SYNCThermal_Cap AGNDPGND AGNDPGND RFB1 CDHCCFLT GND RDMIN1 CVCC RDMIN2 CTHM RDHC Voltage feedback pin of PSURFB2 VDDARP NRTHM1 RTHM2 ATo NTC thermal sensorB IUTTPS71401GND O +5.0V LED Fault Sense Luminosity CVREF CVDD DE OUT VAUX VREF CL VDD O DI RS SENSEVIN_K LM5056/LM5056A DGNDAGND N VI CIN ADR2 ADR1 ADR0 SMBA SDAI SDAO SCL D D V C C Voltage output mary power supplyN N PGND SMBusInterface Pri Figure16. LEDStreetLampTelemetry Copyright©2012–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 15 ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A SNVS827A–OCTOBER2012–REVISEDAPRIL2013 www.ti.com Applications Circuit Telemetryofinputrailand5-Vbiasrailoutputcurrentandvoltage. 2 Y Y RR AT System Bias AUXILITELEME CVREF CVDD V V 8 0 +4 +5. VS-VS+ VAUXLM5056/LM5056AVREF +5.0V System Bias TelemetryVDDAGNDADR 0/1/2 VIN DIODE SMBASDASCL DGND POWER STAGE TEMP SENSE SMBusnterface S I MBIENT/CHASSITEMP SENSE A 0 7 1 N 0 VI PS4 RY RY 1 4093TBMM T AUXILIATELEMET CVREF V System Bias CVDD 0 5. + OUT ODE AUX REF CL VDD DI V V E S N D RS SE M5056/M5056A DAGN _K LL GN VIN D N VI CIN DR2 DR1 DR0 MBA DAI DAO CL A A A S S S S D D V C C N N +48V SMBusnterface I Figure17. 48-VInputRailand5-VBiasRailTelemetry 16 SubmitDocumentationFeedback Copyright©2012–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A www.ti.com SNVS827A–OCTOBER2012–REVISEDAPRIL2013 PMBus™ Command Support The device features an SMBus interface that allows the use of PMBus commands to set warn levels, error masks, and get telemetry on VIN, VOUT, IIN, VAUX, and PIN. The supported PMBus commands are shown in Table1. Table1.PMBus™CommandSupport NUMBER DEFAULT CODE NAME FUNCTION R/W OFDATA VALUE BYTES Clearsthestatusregistersandre-armstheblackbox 03h CLEAR_FAULTS SendByte 0 registersforupdating. 19h CAPABILITY Retrievesthedevicecapability. R 1 B0h Retrievesorstoresoutputunder-voltage,warn-limit 43h VOUT_UV_WARN_LIMIT RandW 2 0000h threshold. Retrievesorstoresover-temperature,fault-limit 0960h 4Fh OT_FAULT_LIMIT RandW 2 threshold. (150°C) Retrievesorstoresover-temperature,warn-limit 07D0h 51h OT_WARN_LIMIT RandW 2 threshold. (125°C) Retrievesorstoresinputover-voltage,warn-limit 57h VIN_OV_WARN_LIMIT RandW 2 0FFFh threshold. Retrievesorstoresinputunder-voltage,warn-limit 58h VIN_UV_WARN_LIMIT RandW 2 0000h threshold. 78h STATUS_BYTE Retrievesinformationaboutthepartsoperatingstatus. R 1 01h 79h STATUS_WORD Retrievesinformationaboutthepartsoperatingstatus. R 2 1801h 7Ah STATUS_VOUT Retrievesinformationaboutoutputvoltagestatus. R 1 00h 7Ch STATUS_INPUT Retrievesinformationaboutinputstatus. R 1 00h 7Dh STATUS_TEMPERATURE Retrievesinformationabouttemperaturestatus. R 1 00h 7Eh STATUS_CML Retrievesinformationaboutcommunicationsstatus. R 1 00h 80h STATUS_MFR_SPECIFIC Retrievesinformationaboutdefaultstatus. R 1 10h 88h READ_VIN Retrievesinputvoltagemeasurement. R 2 0000h 8Bh READ_VOUT Retrievesoutputvoltagemeasurement. R 2 0000h 8Dh READ_TEMPERATURE_1 Retrievestemperaturemeasurement. R 2 0190h 4Eh 99h MFR_ID RetrievesmanufacturerIDinASCIIcharacters(NSC). R 3 53h 43h 4Ch 4Dh 35h RetrievesPartnumberinASCIIcharacters. 30h 9Ah MFR_MODEL R 8 (LM5056/LM5056A/LM5056/LM5056AA). 35h 36h 00h 00h RetrievespartrevisionletterandnumberinASCII 41h 9Bh MFR_REVISION R 2 (e.g.,AA). 41h MFR_SPECIFIC_00 D0h Retrievesauxiliaryvoltagemeasurement. R 2 0000h MFR_READ_VAUX MFR_SPECIFIC_01 D1h Retrievesinputcurrentmeasurement. R 2 0000h MFR_READ_IIN MFR_SPECIFIC_02 D2h Retrievesinputpowermeasurement. R 2 0000h MFR_READ_PIN MFR_SPECIFIC_03 D3h Retrievesorstoresinput-current-limitwarnthreshold. RandW 2 0FFFh MFR_IIN_OC_WARN_LIMIT MFR_SPECIFIC_04 D4h Retrievesorstoresinput-power-limitwarnthreshold. RandW 2 0FFFh MFR_PIN_OP_WARN_LIMIT MFR_SPECIFIC_05 D5h Retrievesmeasuredpeak-input-powermeasurement. R 2 0000h MFR_READ_PIN_PEAK Copyright©2012–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 17 ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A SNVS827A–OCTOBER2012–REVISEDAPRIL2013 www.ti.com Table1.PMBus™CommandSupport(continued) NUMBER DEFAULT CODE NAME FUNCTION R/W OFDATA VALUE BYTES MFR_SPECIFIC_06 Resetsthecontentsofthepeak-input-powerregisterto D6h SendByte 0 MFR_CLEAR_PIN_PEAK zero. MFR_SPECIFIC_08 D8h RetrievesorstoresuserSMBAfaultmask. RandW 2 0800h MFR_ALERT_MASK MFR_SPECIFIC_09 Retrievesorstoresinformationaboutcurrentsense D9h RandW 1 0000h MFR_DEVICE_SETUP gainsetting. 0880h 0000h MFR_SPECIFIC_10 Retrievesmostrecentdiagnosticandtelemetry 0000h DAh R 12 MFR_BLOCK_READ informationinasingletransaction. 0000h 0000h 0000h MFR_SPECIFIC_11 ExponentvalueAVGNfornumberofsamplestobe DBh MFR_SAMPLES_FOR_AVG averaged(N=2AVGN),range=00hto0Ch. RandW 1 00h MFR_SPECIFIC_12 DCh Retrievesaveragedinput-voltagemeasurement. R 2 0000h MFR_READ_AVG_VIN MFR_SPECIFIC_13 DDh Retrievesaveragedoutput-voltagemeasurement. R 2 0000h MFR_READ_AVG_VOUT MFR_SPECIFIC_14 DEh Retrievesaveragedinput-currentmeasurement. R 2 0000h MFR_READ_AVG_IIN MFR_SPECIFIC_15 DFh Retrievesaveragedinput-powermeasurement. R 2 0000h MFR_READ_AVG_PIN 0000h 0000h Capturesdiagnosticandtelemetryinformationwhich MFR_SPECIFIC_16 0000h E0h arelatchedwhenthefirstSMBAeventafterfaultsare R 12 MFR_BLACK_BOX_READ 0000h cleared. 0000h 0000h MFR_SPECIFIC_17 Manufacturer-specificparalleloftheSTATUS_WORD E1h MFR_DIAGNOSTIC_WORD_ toconveyallFAULTandWARNdatainasingle R 2 0880h READ transaction. 0000h 0000h MFR_SPECIFIC_18 Retrievesmostrecentaveragetelemetryand 0000h E2h R 12 MFR_AVG_BLOCK_READ diagnosticinformationinasingletransaction. 0000h 0000h 0000h 18 SubmitDocumentationFeedback Copyright©2012–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A www.ti.com SNVS827A–OCTOBER2012–REVISEDAPRIL2013 Standard PMBus Commands CLEAR_FAULTS(03h) The CLEAR_FAULTS command is a standard PMBus command that resets all stored warning and fault flags and the SMBA signal. If a fault or warning condition still exists when the CLEAR_FAULTS command is issued, the SMBA signal may not clear or will reassert almost immediately. This command uses the PMBus send byte protocol. CAPABILITY(19h) The CAPABILITY command is a standard PMBus command that returns information about the PMBus functions supported by the LM5056/LM5056A/LM5056/LM5056AA. This command is read with the PMBus read byte protocol. Table2.CAPABILITYRegister VALUE MEANING DEFAULT B0h Supportspacketerrorcheck,400Kbits/s,supportsSMBusalert B0h VOUT_UV_WARN_LIMIT(58h) The VOUT_UV_WARN_LIMIT command is a standard PMBus command that allows configuring or reading the threshold for the VOUT under-voltage warning detection. Reading and writing to this register should use the coefficients shown in the Table 39. Accesses to this command should use the PMBus read or write word protocol.IfthemeasuredvalueofVOUTfallsbelowthevalueinthisregister,VOUTunder-voltagewarnflagsare setandtheSMBAsignalisasserted. Table3.VOUT_UV_WARN_LIMITRegister VALUE MEANING DEFAULT 0001h–0FFFh VOUTunder-voltagewarningdetectionthreshold 0000h(disabled) 0000h VOUTunder-voltagewarningdisabled n/a OT_FAULT_LIMIT(4Fh) TheOT_FAULT_LIMITcommandisastandardPMBuscommandthatallowsconfiguringorreadingthethreshold for the over-temperature fault detection. Reading and writing to this register should use the coefficients shown in the Table 39. Accesses to this command should use the PMBus read or write word protocol. If the measured temperatureexceedsthisvalue,anover-temperaturefaultistriggeredandtheSMBAsignalisasserted.Afterthe measured temperature falls below the value in this register, the CLEAR_FAULTS command (03h) should be sent to de-assert the SMBA signal. A single temperature measurement is an average of 16 round-robin cycles; therefore,theminimumtemperaturefaultdetectiontimeis16ms. Table4.OT_FAULT_LIMITRegister VALUE MEANING DEFAULT 0000h–0FFEh Over-temperaturefaultthresholdvalue 0960h(150°C) 0FFFh Over-temperaturefaultdetectiondisabled n/a Copyright©2012–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 19 ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A SNVS827A–OCTOBER2012–REVISEDAPRIL2013 www.ti.com OT_WARN_LIMIT(51h) TheOT_WARN_LIMITcommandisastandardPMBuscommandthatallowsconfiguringorreadingthethreshold for the over-temperature warning detection. Reading and writing to this register should use the coefficients shown in the Table 39. Accesses to this command should use the PMBus read or write word protocol. If the measured temperature exceeds this value, an over-temperature warning is triggered and the over-temperature warn flags set in the respective registers and the SMBA signal asserted. A single temperature measurement is anaverageof16round-robincycles;therefore,theminimumtemperaturewarndetectiontimeis16ms. Table5.OT_WARN_LIMITRegister VALUE MEANING DEFAULT 0000h–0FFEh Over-temperaturewarnthresholdvalue 07D0h(125°C) 0FFFh Over-temperaturewarndetectiondisabled n/a VIN_OV_WARN_LIMIT(57h) The VIN_OV_WARN_LIMIT command is a standard PMBus command that allows configuring or reading the threshold for the VIN over-voltage warning detection. Reading and writing to this register should use the coefficients shown in the Table 39 Table. Accesses to this command should use the PMBus read or write word protocol. If the measured value of VIN rises above the value in this register, VIN over-voltage warn flags are set intherespectiveregistersandtheSMBAsignalisasserted. Table6.VIN_OV_WARN_LIMITRegister VALUE MEANING DEFAULT 0000h–0FFEh VINOver-voltagewarningdetectionthreshold 0FFFh(disabled) 0FFFh VINOver-voltagewarningdisabled n/a VIN_UV_WARN_LIMIT(58h) The VIN_UV_WARN_LIMIT command is a standard PMBus command that allows configuring or reading the threshold for the VIN under-voltage warning detection. Reading and writing to this register should use the coefficients shown in the Table 39. Accesses to this command should use the PMBus read or write word protocol. If the measured value of VIN falls below the value in this register, VIN under-voltage warn flags are set intherespectiveregister,andtheSMBAsignalisasserted. Table7.VIN_UV_WARN_LIMITRegister VALUE MEANING DEFAULT 0001h–0FFFh VINunder-voltagewarningdetectionthreshold 0000h(disabled) 0000h VINunder-voltagewarningdisabled n/a STATUS_BYTE(78h) The STATUS_BYTE is a standard PMBus command that returns the value of a number of flags indicating the state of the LM5056/LM5056A. Accesses to this command should use the PMBus read byte protocol. To clear bits in this register, the underlying fault should be removed on the system and a CLEAR_FAULTS command issued. Table8.STATUS_BYTEDefinitions BIT NAME MEANING DEFAULT 7 BUSY Notsupported,always0 0 6 OFF Notsupported,always0 0 5 VOUT_OV Notsupported,always0 0 4 IOUT_OC Notsupported,always0 0 3 VIN_UV Aninputunder-voltagefaulthasoccurred 0 2 TEMPERATURE Atemperaturefaultorwarninghasoccurred 0 1 CML Acommunicationfaulthasoccurred 0 20 SubmitDocumentationFeedback Copyright©2012–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A www.ti.com SNVS827A–OCTOBER2012–REVISEDAPRIL2013 Table8.STATUS_BYTEDefinitions(continued) BIT NAME MEANING DEFAULT 0 Noneoftheabove Notsupported,always1 1 Copyright©2012–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 21 ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A SNVS827A–OCTOBER2012–REVISEDAPRIL2013 www.ti.com STATUS_WORD(79h) The STATUS_WORD command is a standard PMBus command that returns the value of a number of flags indicating the state of the LM5056/LM5056A. Accesses to this command should use the PMBus read word protocol. To clear bits in this register, the underlying fault should be removed and a CLEAR _FAULTS command issued. Table9.STATUS_WORDDefinitions BIT NAME MEANING DEFAULT 15 VOUT Anoutputvoltagewarninghasoccurred 0 14 IOUT/POUT Notsupported,always0 0 13 INPUT Notsupported,always0 0 12 MFR Amanufacturerspecificfaultorwarninghasoccurred 1 11 POWERGOOD Notsupported,always1 1 10 FANS Notsupported,always0 0 9 OTHER Notsupported,always0 0 8 UNKNOWN Notsupported,always0 0 7 BUSY Notsupported,always0 0 6 OFF Notsupported,always0 0 5 VOUTOV Notsupported,always0 0 4 IOUTOC Notsupported,always0 0 3 VINUV Notsupported,always0 0 2 TEMPERATURE Atemperaturefaultorwarninghasoccurred 0 1 CML Acommunicationfaulthasoccurred 0 0 Noneoftheabove Notsupported,always1 1 STATUS_VOUT(7Ah) TheSTATUS_VOUTcommandisastandardPMBuscommandthatreturnsthevalueoftheVOUTunder-voltage warn flag. Accesses to this command should use the PMBus read byte protocol. To clear bits in this register, the underlyingfaultshouldbeclearedandaCLEAR_FAULTScommandissued. Table10.STATUS_VOUTDefinitions BIT NAME MEANING DEFAULT 7 VOUTOVfault Notsupported,always0 0 6 VOUTOVwarn Notsupported,always0 0 5 VOUTUVwarn AVOUTunder-voltagewarninghasoccurred 0 4 VOUTUVfault Notsupported,always0 0 3 VOUTmax Notsupported,always0 0 2 TONmaxfault Notsupported,always0 0 1 TOFFmaxfault Notsupported,always0 0 0 VOUTtrackingerror Notsupported,always0 0 22 SubmitDocumentationFeedback Copyright©2012–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A www.ti.com SNVS827A–OCTOBER2012–REVISEDAPRIL2013 STATUS_INPUT(7Ch) The STATUS_INPUT command is a standard PMBus command that returns the value of a number of flags related to input voltage, current, and power. Accesses to this command should use the PMBus read byte protocol. To clear bits in this register, the underlying fault should be cleared and a CLEAR_FAULTS command issued. Table11.STATUS_INPUTDefinitions BIT NAME MEANING DEFAULT 7 VINOVFault Notsupported,always0 0 6 VINOVWarn AVINover-voltagewarninghasoccurred 0 5 VINUVWarn AVINunder-voltagewarninghasoccurred 0 4 VINUVFault Notsupported,always0 0 3 Insufficientvoltage Notsupported,always0 0 2 IINOCFault Notsupported,always0 0 1 IINOCWarn AnIINover-currentwarninghasoccurred 0 0 PINOPWarn APINover-powerwarninghasoccurred 0 STATUS_TEMPERATURE(7dh) The STATUS_TEMPERATURE is a standard PMBus command that returns the value of the of a number of flags related to the temperature telemetry value. Accesses to this command should use the PMBus read byte protocol. Toclearbitsinthisregister,theunderlyingfaultshouldbeclearedandaCLEAR_FAULTScommandissued. Table12.STATUS_TEMPERATUREDefinitions BIT NAME MEANING DEFAULT 7 Over-tempfault Anover-temperaturefaulthasoccurred 0 6 Over-tempwarn Anover-temperaturewarninghasoccurred 0 5 Under-tempwarn Notsupported,always0 0 4 Under-tempfault Notsupported,always0 0 3 reserved Notsupported,always0 0 2 reserved Notsupported,always0 0 1 reserved Notsupported,always0 0 0 reserved Notsupported,always0 0 STATUS_CML(7Eh) The STATUS_CML is a standard PMBus command that returns the value of a number of flags related to communication faults. Accesses to this command should use the PMBus read byte protocol. To clear bits in this register,aCLEAR_FAULTScommandshouldbeissued. Table13.STATUS_CMLDefinitions BIT NAME DEFAULT 7 Invalidorunsupportedcommandreceived 0 6 Invalidorunsupporteddatareceived 0 5 PacketErrorCheckfailed 0 4 Notsupported,always0 0 3 Notsupported,always0 0 2 Notsupported,always0 0 1 Miscellaneouscommunicationsfaulthasoccurred 0 0 Notsupported,always0 0 Copyright©2012–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 23 ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A SNVS827A–OCTOBER2012–REVISEDAPRIL2013 www.ti.com STATUS_MFR_SPECIFIC(80h) The STATUS_MFR_SPECIFIC command is a standard PMBus command that contains manufacturer specific status information. Accesses to this command should use the PMBus read byte protocol. To clear bits in this register,theunderlyingfaultshouldberemovedandaCLEAR_FAULTScommandshouldbeissued. Table14.STATUS_MFR_SPECIFICDefinitions BIT NAME DEFAULT 7 Notsupported,always0 0 6 Notsupported,always0 0 5 Notsupported,always0 0 4 Defaultsloaded 1 3 Notsupported,always0 0 2 Notsupported,always0 0 1 Notsupported,always0 0 0 Notsupported,always0 0 READ_VIN(88h) The READ_VIN command is a standard PMBus command that returns the 12-bit measured value of the input voltage (VIN to AGND). Reading this register should use the coefficients shown in the Table 39. Accesses to this command should use the PMBus read word protocol. This value is also used internally for the VIN over and under-voltagewarningdetection. Table15.READ_VINRegister VALUE MEANING DEFAULT 0h–0FFFh MeasuredvalueforVIN 0000h READ_VOUT(8Bh) TheREAD_VOUTcommandisastandardPMBuscommandthatreturnsthe12-bitmeasuredvalueoftheoutput voltage. Reading this register should use the coefficients shown in the Table 39 Table. Accesses to this command should use the PMBus read word protocol. This value is also used internally for the VOUT under_voltagewarningdetection. Table16.READ_VOUTRegister VALUE MEANING DEFAULT 0h–0FFFh MeasuredvalueforVOUT 0000h READ_TEMPERATURE_1(8Dh) The READ_TEMPERATURE_1 command is a standard PMBus command that returns the signed value of the temperaturemeasuredbytheexternaltemperaturesensediode.Readingthisregistershouldusethecoefficients shown in the Table 39. Accesses to this command should use the PMBus read word protocol. This value is also used internally for the over-temperature fault and warning detection. This data has a range of -256°C to 255°C afterthecoefficientsareapplied. Table17. READ_TEMPERATURE_1Register VALUE MEANING DEFAULT 0h–0FFFh MeasuredvalueforTEMPERATURE 0190h 24 SubmitDocumentationFeedback Copyright©2012–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A www.ti.com SNVS827A–OCTOBER2012–REVISEDAPRIL2013 MFR_ID(99h) The MFR_ID command is a standard PMBus command that returns the identification of the manufacturer. To readtheMFR_ID,usethePMBusblockreadprotocol. Table18.MFR_IDRegister BYTE NAME VALUE 0 Numberofbytes 03h 1 MFRID-1 4Eh‘N’ 2 MFRID-2 53h‘S’ 3 MFRID-3 43h‘C’ MFR_MODEL(9Ah) The MFR_MODEL command is a standard PMBus command that returns the part number of the chip. To read theMFR_MODEL,usethePMBusblockreadprotocol. Table19. MFR_MODELRegister BYTE NAME VALUE 0 Numberofbytes 08h 1 MFRID-1 4Ch‘L’ 2 MFRID-2 4Dh‘M’ 3 MFRID-3 35h‘5’ 4 MFRID-4 30h‘0’ 5 MFRID-5 35h‘5’ 6 MFRID-6 36h‘6’ 7 MFRID-7 00h 8 MFRID-8 00h MFR_REVISION(9Bh) The MFR_REVISION command is a standard PMBus command that returns the revision level of the part. To readtheMFR_REVISION,usethePMBusblockreadprotocol. Table20.MFR_REVISIONRegister BYTE NAME VALUE 0 Numberofbytes 02h 1 MFRID-1 41h‘A’ 2 MFRID-2 41h‘A’ Copyright©2012–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 25 ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A SNVS827A–OCTOBER2012–REVISEDAPRIL2013 www.ti.com Manufacturer Specific PMBus™ Commands MFR_SPECIFIC_00:MFR_READ_VAUX(D0h) The MFR_READ_VAUX command will report the 12-bit ADC measured auxiliary voltage. Voltages greater than or equal to 2.97 V to ground are reported at plus full scale (0FFFh). Voltages less than or equal to 0 V referenced to ground are reported as 0 (0000h). To read data from the MFR_READ_VAUX command, use the PMBusReadWordprotocol. Table21.MFR_READ_VAUXRegister VALUE MEANING DEFAULT 0h–0FFFh MeasuredvalueforVAUXinput 0000h MFR_SPECIFIC_01:MFR_READ_IIN(D1h) The MFR_READ_IIN command reports the 12-bit ADC measured current sense voltage. To read data from the MFR_READ_IIN command, use the PMBus Read Word protocol. Reading this register should use the coefficients shown in the Table 39. Please see the section on coefficient calculations to calculate the values to use. Table22.MFR_READ_IINRegister VALUE MEANING DEFAULT 0h–0FFFh Measuredvalueforinputcurrentsensevoltage 0000h MFR_SPECIFIC_02:MFR_READ_PIN(D2h) The MFR_READ_PIN command reports the upper 12 bits of the VIN x IIN product as measured by the 12-bit ADC. To read data from the MFR_READ_PIN command, use the PMBus Read Word protocol. Reading this register should use the coefficients shown in the Table 39. Please see the section on coefficient calculations to calculatethevaluestouse. Table23.MFR_READ_PINRegister VALUE MEANING DEFAULT 0h–0FFFh Valueforinputcurrentxinputvoltage 0000h MFR_SPECIFIC_03:MFR_IN_OC_WARN_LIMIT(D3h) The MFR_IIN_OC_WARN_LIMIT PMBus command sets the input over-current warning threshold. In the event that the input current rises above the value set in this register, the IIN over-current flags are set in the respective registers and the SMBA is asserted. To access the MFR_IIN_OC_WARN_LIMIT register, use the PMBus Read/WriteWordprotocol.Reading/writingtothisregistershouldusethecoefficientsshownintheTable39. Table24.MFR_IIN_OC_WARN_LIMITRegister VALUE MEANING DEFAULT 0h–0FFEh Valueforinputover-currentwarnlimit 0FFFh 0FFFh Inputover-currentwarningdisabled n/a 26 SubmitDocumentationFeedback Copyright©2012–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A www.ti.com SNVS827A–OCTOBER2012–REVISEDAPRIL2013 MFR_SPECIFIC_04:MFR_PIN_OP_WARN_LIMIT(D4h) The MFR_PIN_OP_WARN_LIMIT PMBus command sets the input over-power warning threshold. In the event that the input power rises above the value set in this register, the PIN over-power flags are set in the respective registers and the SMBA is asserted. To access the MFR_PIN_OP_WARN_LIMIT register, use the PMBus Read/WriteWordprotocol.Reading/writingtothisregistershouldusethecoefficientsshownintheTable39. Table25.MFR_PIN_OPWARN_LIMITRegister VALUE MEANING DEFAULT 0h–0FFEh Valueforinputover-powerwarnlimit 0FFFh 0FFFh Inputover-powerwarningdisabled n/a MFR_SPECIFIC_05:MFR_READ_PIN_PEAK(D5h) The MFR_READ_PIN_PEAK command reports the maximum input power measured since a power-on reset or the last MFR_CLEAR_PIN_PEAK command. To access the MFR_READ_PIN_PEAK command, use the PMBus ReadWordprotocol.UsetheTable39. Table26.MFR_READ_PIN_PEAKRegister VALUE MEANING DEFAULT Maximumvalueforinputcurrentxinputvoltagesinceresetorlast 0h–0FFEh 0h clear MFR_SPECIFIC_06:MFR_CLEAR_PIN_PEAK(D6h) The MFR_CLEAR_PIN_PEAK command clears the MFR_PIN_PEAK register. This command uses the PMBus SendByteprotocol. Copyright©2012–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 27 ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A SNVS827A–OCTOBER2012–REVISEDAPRIL2013 www.ti.com MFR_SPECIFIC_08:MFR_ALERT_MASK(D8h) The MFR_ALERT_MASK command is used to mask the SMBA when a specific fault or warning has occurred. Each bit corresponds to one of the 8 different analog and digital faults or warnings that would normally result in an SMBA being asserted. When the corresponding bit is high, that condition will not cause the SMBA to be asserted. If that condition occurs, the registers where that condition is captured will still be updated (STATUS registers,DIAGNOSTIC_WORD).ThisregisterisaccessedwiththePMBusReadandWriteWordprotocol. Table27.MFR_ALERT_MASKDefinitions BIT NAME DEFAULT 15 VOUTunder-voltagewarn 0 14 IINlimitwarn 0 13 VINunder-voltagewarn 0 12 VINover-voltagewarn 0 11 Notsupported,always0 0 10 Over-temperaturewarn 0 9 Notsupported,always0 0 8 Over-powerwarn 0 7 Notsupported,always0 0 6 Notsupported,always0 0 5 Notsupported,always0 0 4 Notsupported,always0 0 3 Notsupported,always0 0 2 Over-temperaturefault 0 1 CMLFAULT(communicationsfault) 0 0 Notsupported,always0 0 28 SubmitDocumentationFeedback Copyright©2012–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A www.ti.com SNVS827A–OCTOBER2012–REVISEDAPRIL2013 MFR_SPECIFIC_09:MFR_DEVICE_SETUP(D9h) The MFR_DEVICE_SETUP command may be used to override pin settings to define operation of the LM5056/LM5056Aunderhostcontrol.ThiscommandisaccessedwiththePMBusreadandwritebyteprotocol. Table28.MFR_DEVICE_SETUPByteFormat BIT NAME DEFAULT 7:5 Notsupported,always0 0 (Default)0=Highsetting 4 Currentsensegain (54.4mV) 1=Lowsetting(27.0mV) 3 Notsupported,always0 0 (Default)0=Usepinsettings 2 Currentsensegainselectconfiguration 1=UseSMBussettings 1 Unused 0 0 Unused 0 In order to configure the current sense gain via this register, it is necessary to set the Current Sense Gain Select Configuration bit (2) to 1 to enable the register to control the current sense gain and the Current Sense Gain bit (4) to select the desired setting. If the Current Sense Gain Select Configuration bit is not set, the pin setting is used. NOTE If the Current Sense Gain Select Configuration is changed, the samples for the telemetry averaging function will not be reset. It is recommended to allow a full averaging update periodwiththenewCurrentSenseGainbeforeprocessingtheaverageddata. The Current Sense Gain Select Configuration affects the coefficients used for the current andpowermeasurementsandwarningregisters. Copyright©2012–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 29 ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A SNVS827A–OCTOBER2012–REVISEDAPRIL2013 www.ti.com MFR_SPECIFIC_10:MFR_BLOCK_READ(DAh) The MFR_BLOCK_READ command concatenates the MFR_DIAGNOSTIC_WORD with input and output telemetry information (IIN, VOUT, VIN, PIN) as well as TEMPERATURE to capture all of the operating information of the LM5056/LM5056A in a single SMBus transaction. The block is 12 bytes long with telemetry informationbeingsentoutinthesamemannerasifanindividualREAD_XXXcommandhadbeenissued(shown below). The contents of the MFR_BLOCK_READ register are updated every clock cycle (85 ns) as long as the SMBus interface is idle. MFR_BLOCK_READ also ensures that the VIN, VOUT, IIN and PIN measurements are all time-aligned. If separate commands are used, individual samples may not be time-aligned, because of the delay necessary for the communication protocol. The MFR_BLOCK_READ command is read via the PMBus blockreadprotocol. Table29.MFR_BLOCK_READRegisterFormat BYTECOUNT(ALWAYS12) (1BYTE) MFR_DIAGNOSTIC_WORD (1Word) IIN_BLOCK (1Word) VOUT_BLOCK (1Word) VIN_BLOCK (1Word) PIN_BLOCK (1Word) TEMP_BLOCK (1Word) 30 SubmitDocumentationFeedback Copyright©2012–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A www.ti.com SNVS827A–OCTOBER2012–REVISEDAPRIL2013 MFR_SPECIFIC_11:MFR_SAMPLES_FOR_AVG(DBh) The MFR_SAMPLES_FOR_AVG command is a manufacturer specific command for setting the number of samples used in computing the average values for IIN, VIN, VOUT, PIN. The decimal equivalent of the AVGN nibble is the power of two samples, (e.g. AVGN = 12 equates to N = 4096 samples used in computing the average). The LM5056/LM5056A supports average numbers of 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096. The MFR_SAMPLES_FOR_AVG number applies to average values of IIN, VIN, VOUT, PIN simultaneously. The LM5056/LM5056A uses simple averaging. This is accomplished by summing consecutive results up to the number programmed, then dividing by the number of samples. Averaging is calculated accordingtothefollowingsequence: (X(N)+X(N-1)+...+X(0)) Y = N (2) When the averaging has reached the end of a sequence (for example, 4096 samples are averaged), then a whole new sequence begins that requires the same number of samples (in this example, 4096) to be taken beforethenewaverageisready. Table30.MFR_SAMPLES_FOR_AVGRegister AVGN N=2AVGN AVERAGINGANDREGISTERUPDATE PERIOD(ms) 0000 1 1 0001 2 2 0010 4 4 0011 8 8 0100 16 16 0101 32 32 0110 64 64 0111 128 128 1000 256 256 1001 512 512 1010 1024 1024 1011 2048 2048 1100 4096 4096 NOTE A change in the MFR_SAMPLES_FOR_AVG register are not reflected in the average telemetry measurements until the present averaging interval has completed. The default setting for AVGN is 0000, therefore, the average telemetry mirrors the instantaneous telemetryuntilavaluehigherthanzeroisprogrammed. The MFR_SAMPLES_FOR_AVG register is accessed via the PMBus read and write byte protocol. Table31.MFR_SAMPLES_FOR_AVGRegister VALUE MEANING DEFAULT 0h–0Ch Exponent(AVGN)fornumberofsamplestoaverageover 00h Copyright©2012–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 31 ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A SNVS827A–OCTOBER2012–REVISEDAPRIL2013 www.ti.com MFR_SPECIFIC_12:MFR_READ_AVG_VIN(DCh) The MFR_READ_AVG_VIN command will report the 12-bit ADC measured input average voltage. If the data is not ready, the returned value is the previous averaged data. However, if there is no previously averaged data, the default value (0000h) is returned. This data is read with the PMBus Read Word protocol. This register should usethecoefficientsshownintheTable39. Table32.MFR_READ_AVG_VINRegister VALUE MEANING DEFAULT 0h–0FFFh Averageofmeasuredvaluesforinputvoltage 0000h MFR_SPECIFIC_13:MFR_READ_AVG_VOUT(DDh) The MFR_READ_AVG_VOUT command reports the 12-bit ADC measured current sense average voltage. The returned value is the default value (0000h) or previous data when the average data is not ready. This data is readwiththePMBusReadWordprotocol.ThisregistershouldusethecoefficientsshownintheTable39. Table33.MFR_READ_AVG_VOUTRegister VALUE MEANING DEFAULT 0h–0FFFh Averageofmeasuredvaluesforoutputvoltage 0000h MFR_SPECIFIC_14:MFR_READ_AVG_IIN(DEh) The MFR_READ_AVG_IIN command reports the 12-bit ADC measured current sense average voltage. The returned value is the default value (0000h) or previous data when the average data is not ready. This data is readwiththePMBusReadWordprotocol.ThisregistershouldusethecoefficientsshownintheTable39. Table34.MFR_READ_AVG_IINRegister VALUE MEANING DEFAULT 0h–0FFFh Averageofmeasuredvaluesforcurrentsensevoltage 0000h MFR_SPECIFIC_15:MFR_READ_AVG_PIN The MFR_READ_AVG_PIN command reports the upper 12-bits of the average VIN x IIN product as measured by the 12-bit ADC. Read the default value (0000h) or previous data when the average data is not ready. This data is read with the PMBus Read Word protocol. This register should use the coefficients shown in the Table39. Table35.TABLE35.MFR_READ_AVG_PINRegister VALUE MEANING DEFAULT Averageofmeasuredvalueforinputvoltagexinputcurrentsense 0h–0FFFh 0000h voltage MFR_SPECIFIC_16:MFR_BLACK_BOX_READ(E0h) The MFR_BLACK_BOX_READ command retrieves the MFR_BLOCK_READ data which was latched in at the first assertion of SMBA by the LM5056/LM5056A. It is re-armed with the CLEAR_FAULTS command. It is the same format as the MFR_BLOCK_READ registers, the only difference being that its contents are updated with theSMBAedgeratherthantheinternalclockedge.ThiscommandisreadwiththePMBusBlockReadprotocol. 32 SubmitDocumentationFeedback Copyright©2012–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A www.ti.com SNVS827A–OCTOBER2012–REVISEDAPRIL2013 MFR_SPECIFIC_17:MFR_READ_DIAGNOSTIC_WORD(E1h) The MFR_READ_DIAGNOSTIC_WORD PMBus command reports all of the LM5056/LM5056A faults and warnings in a single read operation. The standard response to the assertion of the SMBA signal of issuing multiple read requests to various status registers can be replaced by a single word read to the MFR_DIAGNOSTIC_WORDregister.TheMFR_READ_DIAGNOSTIC_WORDcommandshouldbereadwiththe PMBus Read Word protocol. The MFR_READ_DIAGNOSTIC_WORD is also returned in the MFR_BLOCK_READ,MFR_BLACK_BOX_READ,andMFR_AVG_BLOCK_READoperations. Table36.MFR_DIAGNOSTIC_WORDFormat BIT MEANING DEFAULT 15 VOUTunder-voltagewarn 0 14 Over-currentwarnorover-powerwarn 0 13 VINunder-votlagewarn 0 12 VINover-voltagewarn 0 11 Notsupported,always1 1 10 Over-temperaturewarn 0 9 Notsupported,always0 0 8 Notsupported,always0 0 7 CONFIG_PRESET 1 6 Notsupported,always0 0 5 Notsupported,always0 0 4 Notsupported,always0 0 3 Notsupported,always0 0 2 Notsupported,always0 0 1 CML_FAULT 0 0 Notsupported,always0 0 MFR_SPECIFIC_18:MFR_AVG_BLOCK_READ(E2h) The MFR_AVG_BLOCK_READ command concatenates the MFR_DIAGNOSTIC_WORD with input and output average telemetry information (IIN, VOUT, VIN, PIN) as well as temperature to capture all of the operating information of the part in a single PMBus transaction. The block is 12 bytes long with telemetry information being sent out in the same manner as if an individual READ_AVG_XXX command had been issued (shown below). MFR_AVG_BLOCK_READ also ensures that the VIN, VOUT, and IIN measurements are all time-aligned whereas there is a chance they may not be if read with individual PMBus commands. To read data from the MFR_AVG_BLOCK_READcommand,usetheSMBusBlockReadprotocol. Table37.MFR_AVG_BLOCK_READRegisterFormat BYTECOUNT(ALWAYS12) (1BYTE) MFR_DIAGNOSTIC_WORD (1word) AVG_IIN (1word) AVG_VOUT (1word) AVG_VIN (1word) AVG_PIN (1word) TEMPERATURE (1word) Copyright©2012–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 33 ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A SNVS827A–OCTOBER2012–REVISEDAPRIL2013 www.ti.com WARNINGSYSTEM VINOVWARNSTATUS_INPUT7Ch VINUVWARNSTATUS_INPUT7Ch IINOCWARNSTATUS_INPUT7Ch PINOPWARNSTATUS_INPUT7Ch VOUTUVWARNSTATUS_VOUT7Ah OVER-TEMPWARNSTATUS_TEMPERATURE7Dh OVER-TEMPFAULTSTATUS_TEMPERATURE7Dh R_DIAGNOSTIC_WORD_READE1h F M MP MP MP MP MP MP MP C C C C C C C WARNINGLIMITS VIN_OV_WARN_LIMIT57h VIN_UV_WARN_LIMIT58h MFR_IIN_OC_WARN_LIMITD3h MFR_PIN_OP_WARN_LIMITD4h VOUT_UV_WARN_LIMIT58h OT_WARNING_LIMIT51h OT_FAULT_LIMIT4Fh rface e nt I s u B M Toload VOUT H MUXADC MFR_SAMPLES_FOR_AVGDBh MFR_READ_AVG_VINDCh MFR_READ_AVG_IINDEh MFR_READ_AVG_PINDFh MFR_READ_AVG_VOUTDDh AVERAGEDDATA MFR_READ_PIN_PEAKD5h MFR_CLEAR_PIN_PEAKD6hPEAK-HOLD P S/ SE OUT IIN VIN N V E S Dh VINVIN_K +- DATAOUTPUT MFR_READ_VAUXD0h READ_VIN88h MFR_READ_IIND1h MFR_READ_PIND2h READ_VOUT8Bh AD_TEMPERATURE_18 E R X E +48V VAU DIOD Figure18. Command,RegisterandAlertFlowDiagram 34 SubmitDocumentationFeedback Copyright©2012–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A www.ti.com SNVS827A–OCTOBER2012–REVISEDAPRIL2013 Reading and Writing Telemetry Data and Warning Thresholds All measured telemetry data and user programmed warning thresholds are communicated in 12-bit two’s compliment binary numbers read and written in 2-byte increments conforming to the direct format as described in section 8.3.3 of the PMBus Power System Management Protocol Specification 1.1 (Part II). The organization of thebitsinthetelemetryorwarningwordisshowninTable38,whereBit_11isthemostsignificantbit(MSB)and Bit_0 is the least significant bit (LSB). The decimal equivalent of all warning and telemetry words are constrained to be within the range of 0 to 4095, with the exception of temperature. The decimal equivalent value of the temperaturewordrangesfrom0to65535. Table38.TelemetryandWarningWordFormat BYTE B7 B6 B5 B4 B3 B2 B1 B0 1 Bit_7 Bit_6 Bit_5 Bit_4 Bit_3 Bit_2 Bit_1 Bit_0 2 0 0 0 0 Bit_11 Bit_10 Bit_9 Bit_8 Conversion from direct format to real-world dimensions of current, voltage, power, and temperature is accomplished by determining appropriate coefficients as described in section 7.2.1 of the PMBus Power System Management Protocol Specification 1.1 (Part II). According to this specification, the host system converts the valuesreceivedintoareadingofvolts,amperes,watts,orotherunitsusingthefollowingrelationship: X= 1(Y´10-R -B) m where • X:thecalculatedreal-worldvalue(volts,amps,watt,etc.) • m:theslopecoefficient • Y:atwobytetwo'scomplementintegerreceivedfromdevice • b:theoffset,atwobyte,two'scomplementinteger • R:theexponent,aonebytetwo'scomplementinteger (3) R is only necessary in systems where m is required to be an integer (for example, where m may be stored in a registerinanintegratedcircuit).Inthosecases,Ronlyneedstobelargeenoughtoyieldthedesiredaccuracy. Copyright©2012–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 35 ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A SNVS827A–OCTOBER2012–REVISEDAPRIL2013 www.ti.com Table39.TelemetryandWarningConversionCoefficients NUMBER COMMANDS CONDITION FORMAT OFDATA m b R UNITS BYTES READ_VINMFR_READ_AVG_VIN VIN_OV_WARN_LIMIT DIRECT 2 4612 -566 -2 V VIN_UV_WARN_LIMIT READ_VOUT MFR_READ_AVG_VOUT DIRECT 2 4607 179 -2 V VOUT_UV_WARN_LIMIT MFR_READ_VAUX DIRECT 2 13801 11 -1 V (1)MFR_READ_IIN MFR_READ_AVG_IIN CL=VDD DIRECT 2 14985 4271 -2 A MFR_IIN_OC_WARN_LIMIT (1)MFR_READ_IIN MFR_READ_AVG_IIN CL=GND DIRECT 2 7471 1949 -2 A MFR_IIN_OC_WARN_LIMIT (1)MFR_READ_PIN MFR_READ_AVG_PIN CL=VDD DIRECT 2 1684 22344 -3 W MFR_READ_PIN_PEAK MFR_PIN_OP_WARN_LIMIT (1)MFR_READ_PIN MFR_READ_AVG_PIN CL=GND DIRECT 2 839 9822 -3 W MFR_READ_PIN_PEAK MFR_PIN_OP_WARN_LIMIT READ_TEMPERATURE_1 DIRECT 2 16000 0 -3 °C OT_WARN_LIMITOT_FAULT_LIMIT (1) Thecoefficientsrelatingtocurrent/powermeasurementsandwarningthresholdsshowninTable39arenormalizedtoasenseresistor (RS)valueof1mΩ.Ingeneral,thecurrent/powercoefficientscanbecalculatedusingtherelationshipsshowninTable40. Table40.CurrentandPowerTelemetryandWarningConversionCoefficients(R inmΩ) S NUMBER COMMANDS CONDITION FORMAT OFDATA m b R UNITS BYTES MFR_READ_IIN MFR_READ_AVG_IIN CL=VDD DIRECT 2 14985xRS 4271 -2 A MFR_IIN_OC_WARN_LIMIT MFR_READ_IIN MFR_READ_AVG_IIN CL=GND DIRECT 2 7471xRS 1949 -2 A MFR_IIN_OC_WARN_LIMIT MFR_READ_PIN MFR_READ_AVG_PIN CL=VDD DIRECT 2 1684xRS 22344 -3 W MFR_READ_PIN_PEAK MFR_PIN_OP_WARN_LIMIT MFR_READ_PIN MFR_READ_AVG_PIN CL=GND DIRECT 2 839xRS 9822 -3 W MFR_READ_PIN_PEAK MFR_PIN_OP_WARN_LIMIT Care must be taken to adjust the exponent coefficient, R, such that the value of m remains within the range of - 32768 to 32767. For example, if a 5-mΩ sense resistor (RS) is used, the correct coefficients for the READ_IIN commandwithCL=VDDwouldbem=3736,b=195,R=-1. Note: The power coefficients given in Table 39 are characterized at a specific operating point of 48-V VIN. If high-power accuracy is desired at voltages other than 48 V, it is recommended to read VIN and IIN using the MFR_BLOCK_READ(DAh)command.Afterfindingthereal-worldvalueofVINandIINusingthecoefficients,the power can simply be calculated by the multiplication of the two measurements. This will ensure the user obtains the highest accuracy power measurement. Another method to ensure accurate telemetry is to find new coefficientsforyourspecficapplication.Thisisoutlinedintheproceedingsection. 36 SubmitDocumentationFeedback Copyright©2012–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A www.ti.com SNVS827A–OCTOBER2012–REVISEDAPRIL2013 Determining Telemetry Coefficients Empirically with Linear Fit The coefficients for telemetry measurements and warning thresholds presented in Table 39 are adequate for the majority of applications. Current and power coefficients must be calculated per application as they are dependent on the value of the sense resistor, R , used. Table 40 provides the equations necessary for calculating the S current and power coefficients for the general case. The small signal nature of the current measurement make it and the power measurement more susceptible to PCB parasitics than other telemetry channels. This may cause slight variations in the optimum coefficients (m, b, R) for converting from Direct format digital values to real-world values (e.g., Amps and Watts). The optimum coefficients can be determined empirically for a specific application and PCB layout using two or more measurements of the telemetry channel of interest. The current coefficients canbedeterminedusingthefollowingmethod: 1. While the LM5056/LM5056A is in normal operation measure the voltage across the sense resistor using Kelvin test points and a high accuracy DVM while controlling the load current. Record the integer value returned by the MFR_READ_AVG_IIN command (with the MFR_SAMPLES_FOR_AVG set to a value greater than 0) for two or more voltages across the sense resistor. For best results, the individual MFR_READ_AVG_IIN measurements should span nearly the full scale range of the current (For example, voltageacrossRSof5mVand20mV). 2. Convert the measured voltages to currents by dividing them by the value of R . For best accuracy the value S ofR shouldbemeasured.Table41assumesasenseresistorvalueof5mΩ. S Table41. MeasurementsforLinearFitDeterminationofCurrentCoefficients MEASUREDVOLTAGEACROSSR (V) MEASUREDCURRENT(A) READ_AVG_IIN(integervalue) S 0.005 1 568 0.01 2 1108 0.02 4 2185 3. Using the spreadsheet or math program of your choice determine the slope and the y-intercept of the data returnedbytheREAD_AVG_IINcommandversusthemeasuredcurrent.ForthedatashowninTable41: – READ_AVG_INvalue=slopex(MeasuredCurrent)+(y-intercept) – slope=538.9 – y-intercept=29.5 4. To determine the ‘m’ coefficient, simply shift the decimal point of the calculated slope to arrive at at integer with a suitable number of significant digits for accuracy (typically 4) while staying with the range of -32768 to +32767. This shift in the decimal point equates to the ‘R’ coefficient. For the slope value shown above, the decimalpointwouldbeshiftedtotherightoncehenceR=-1. 5. Once the ‘R’ coefficient has been determined, the ‘b’ coefficient is found by multiplying the y-intercept by 10- R.Inthiscasethevalueofb=295.Calculatedcurrentcoefficients: – m=5389 – b=295 – R=-1 X= 1(Y´10-R -b) m where • X:thecalculatedreal-worldvalue(volts,amps,watts,temperature) • m:theslopecoefficient,isthetwobyte,two'scomplementinteger • Y:atwobytetwo'scomplementintegerreceivedfromdevice • b:theoffset,atwobyte,two'scomplementinteger • R:theexponent,aonebytetwo'scomplementinteger (4) The above procedure can be repeated to determine the coefficients of any telemetry channel simply by substituting measured current for some other parameter (e.g., power, voltage, etc.). Note that the above procedurecanbeexecutedusingthePMBussoftwareGUIfoundintheLM5056/LM5056Aonlineproductfolder Copyright©2012–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 37 ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A SNVS827A–OCTOBER2012–REVISEDAPRIL2013 www.ti.com Writing Telemetry Data There are several locations that require writing data if their optional usage is desired. Use the same coefficients previouslycalculatedforyourapplication,andapplythemusingthismethodasprescribedbythePMBusrevision section7.2.2SendingaValue. Y =(mX+b)´10R where • X:thecalculatedreal-worldvalue(volts,amps,watts,temperature) • m:theslopecoefficient,isthetwobyte,two'scomplementinteger • Y:atwobytetwo'scomplementintegerreceivedfromdevice • b:theoffset,atwobyte,two'scomplementinteger • R:theexponent,aonebytetwo'scomplementinteger (5) PMBus™ Address Lines (ADR0, ADR1, ADR2) The three address lines are to be set high (connect to VDD), low (connect to GND), or open to select one of 27 addresses for communicating with the LM5056/LM5056A. Table 42 depicts 7-bit addresses (eighth bit is read andwritebit): Table42.DeviceAddressing ADR2 ADR1 ADR0 DECODEDADDRESS Z Z Z 40h Z Z 0 41h Z Z 1 42h Z 0 Z 43h Z 0 0 44h Z 0 1 45h Z 1 Z 46h Z 1 0 47h Z 1 1 10h 0 Z Z 11h 0 Z 0 12h 0 Z 1 13h 0 0 Z 14h 0 0 0 15h 0 0 1 16h 0 1 Z 17h 0 1 0 53h 0 1 1 53h 1 Z Z 53h 1 Z 0 53h 1 Z 1 54h 1 0 Z 56h 1 0 0 56h 1 0 1 57h 1 1 Z 58h 1 1 0 59h 1 1 1 5Ah 38 SubmitDocumentationFeedback Copyright©2012–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A www.ti.com SNVS827A–OCTOBER2012–REVISEDAPRIL2013 tR tF SCL tLOW VIH VIL tHIGH tSU;STA tSU;STO tHD;STA tHD;DAT tSU;DAT SDA VIH VIL tBUF P S S P Figure19. SMBusTimingDiagram Table43.SMBusTimingDefinition LIMITS SYMBOL PARAMETER UNITS MIN MAX F SMBusoperatingfrequency 10 400 kHz SMB T Busfreetimebetweenstopandstartcondition 1.3 BUF Holdtimeafter(repeated)startcondition.Afterthisperiod,thefirstclockis T 0.6 HD:STA generated. μs T Repeatedstartconditionsetuptime 0.6 SU:STA T Stopconditionsetuptime 0.6 SU:STO T Dataholdtime 85 HD:DAT ns T Datasetuptime 100 SU:DAT T Clocklowtime-out(1) 25 35 ms TIMEOUT T Clocklowperiod 1.5 LOW μs T Clockhighperiod(2) 0.6 HIGH T Clockhighperiod(3) 25 LOW:SEXT ms T Cumulativelowextendtime(masterdevice)(4) 10 LOW:MEXT T Clockordatafalltime(5) 20 300 F ns T Clockordatarisetime(5) 20 300 R (1) DevicesparticipatinginatransferwilltimeoutwhenanyclocklowexceedsthevalueofTTIMEOUT,MINof25ms.Devicesthathave detectedatimeoutconditionmustresetthecommunicationnolaterthanTTIMEOUT,MAXof35ms.Themaximumvaluemustbe adheredtobybothamasterandaslaveasitincorporatesthecumulativestretchlimitforbothamaster(10ms)andaslave(25ms). (2) THIGHMAXprovidesasimplemethodfordevicestodetectbusidleconditions. (3) T isthecumulativetimeaslavedeviceisallowedtoextendtheclockcyclesinonemessagefromtheinitialstarttothestop.If LOW:SEXT aslaveexceedsthistime,itisexpectedtoreleasebothitsclockanddatalinesandresetitself. (4) T isthecumulativetimeamasterdeviceisallowedtoextenditsclockcycleswithineachbyteofamessageasdefinedfrom LOW:MEXT start-to-ack,ackto-ack,orack-to-stop. (5) Riseandfalltimeisdefinedasfollows: (a)T =(V –0.15)to(V +0.15) R ILMAX IHMIN (b)T =0.9VDDto(V –0.15) F ILMAX Copyright©2012–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 39 ProductFolderLinks:LM5056 LM5056A

LM5056, LM5056A SNVS827A–OCTOBER2012–REVISEDAPRIL2013 www.ti.com SMBA Response TheSMBAeffectivelyhastwomasks: 1. TheAlertMaskRegisteratD8h,and 2. TheARAAutomaticMask. The ARA Automatic Mask is a mask that is set in response to a successful ARA read. An ARA read operation returns the PMBus address of the lowest addressed part on the bus that has its SMBA asserted. A successful ARA read means that THIS part was the one that returned its address. When a part responds to the ARA read, it releases the SMBA signal. When the last part on the bus that has an SMBA set has successfully reported its address,theSMBAsignalde-asserts. The way that the LM5056/LM5056A releases the SMBA signal is by setting the ARA Automatic mask bit for all fault conditions present at the time of the ARA read. All status registers still show the fault condition, but it is not generated and SMBA on that fault again until the ARA Automatic mask is cleared by the host issuing a CLEAR_FAULTScommandtothispart.ThisshouldbedoneasaroutinepartofservicinganSMBAconditionon apart,eveniftheARAreadisnotdone.Figure20depictsaschematicversionofthisflow. From other fault inputs SMBA Fault Condition Alert Mask D8h From PMBus Set ARAAuto Mask ARAOperation Flag Succeeded Clear_Fault Command Received Clear Figure20. TypicalFlowSchematicforSMBAFault 40 SubmitDocumentationFeedback Copyright©2012–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM5056 LM5056A

PACKAGE OPTION ADDENDUM www.ti.com 6-Feb-2020 PACKAGING INFORMATION Orderable Device Status Package Type Package Pins Package Eco Plan Lead/Ball Finish MSL Peak Temp Op Temp (°C) Device Marking Samples (1) Drawing Qty (2) (6) (3) (4/5) LM5056APMH/NOPB ACTIVE HTSSOP PWP 28 48 Green (RoHS SN Level-3-260C-168 HR -40 to 125 LM5056APMH & no Sb/Br) LM5056APMHE/NOPB ACTIVE HTSSOP PWP 28 250 Green (RoHS SN Level-3-260C-168 HR -40 to 125 LM5056APMH & no Sb/Br) LM5056APMHX/NOPB ACTIVE HTSSOP PWP 28 2500 Green (RoHS SN Level-3-260C-168 HR -40 to 125 LM5056APMH & no Sb/Br) LM5056PMH/NOPB ACTIVE HTSSOP PWP 28 48 Green (RoHS SN Level-3-260C-168 HR -40 to 125 LM5056PMH & no Sb/Br) LM5056PMHE/NOPB ACTIVE HTSSOP PWP 28 250 Green (RoHS SN Level-3-260C-168 HR -40 to 125 LM5056PMH & no Sb/Br) LM5056PMHX/NOPB ACTIVE HTSSOP PWP 28 2500 Green (RoHS SN Level-3-260C-168 HR -40 to 125 LM5056PMH & no Sb/Br) (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based flame retardants must also meet the <=1000ppm threshold requirement. (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. Addendum-Page 1

PACKAGE OPTION ADDENDUM www.ti.com 6-Feb-2020 (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. Addendum-Page 2

PACKAGE MATERIALS INFORMATION www.ti.com 10-Sep-2017 TAPE AND REEL INFORMATION *Alldimensionsarenominal Device Package Package Pins SPQ Reel Reel A0 B0 K0 P1 W Pin1 Type Drawing Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant (mm) W1(mm) LM5056APMHE/NOPB HTSSOP PWP 28 250 178.0 16.4 6.8 10.2 1.6 8.0 16.0 Q1 LM5056APMHX/NOPB HTSSOP PWP 28 2500 330.0 16.4 6.8 10.2 1.6 8.0 16.0 Q1 LM5056PMHE/NOPB HTSSOP PWP 28 250 178.0 16.4 6.8 10.2 1.6 8.0 16.0 Q1 LM5056PMHX/NOPB HTSSOP PWP 28 2500 330.0 16.4 6.8 10.2 1.6 8.0 16.0 Q1 PackMaterials-Page1

PACKAGE MATERIALS INFORMATION www.ti.com 10-Sep-2017 *Alldimensionsarenominal Device PackageType PackageDrawing Pins SPQ Length(mm) Width(mm) Height(mm) LM5056APMHE/NOPB HTSSOP PWP 28 250 210.0 185.0 35.0 LM5056APMHX/NOPB HTSSOP PWP 28 2500 367.0 367.0 38.0 LM5056PMHE/NOPB HTSSOP PWP 28 250 210.0 185.0 35.0 LM5056PMHX/NOPB HTSSOP PWP 28 2500 367.0 367.0 38.0 PackMaterials-Page2

PACKAGE OUTLINE PWP0028A PowerPAD T M - 1.1 mm max height SCALE 1.800 PLASTIC SMALL OUTLINE C 6.6 6.2 TYP SEATING PLANE A PIN 1 ID 0.1 C AREA 26X 0.65 28 1 9.8 2X 9.6 NOTE 3 8.45 14 15 0.30 28X 0.19 1.1 MAX 4.5 B 4.3 0.1 C A B NOTE 4 0.20 TYP 0.09 SEE DETAIL A 3.15 2.75 0.25 GAGE PLANE 5.65 5.25 0.10 THERMAL 0 - 8 0.02 PAD 0.7 0.5 DETAIL A (1) TYPICAL 4214870/A 10/2014 NOTES: PowerPAD is a trademark of Texas Instruments. 1. All linear dimensions are in millimeters. Any dimensions in parenthesis are for reference only. Dimensioning and tolerancing per ASME Y14.5M. 2. This drawing is subject to change without notice. 3. This dimension does not include mold flash, protrusions, or gate burrs. Mold flash, protrusions, or gate burrs shall not exceed 0.15 mm, per side. 4. This dimension does not include interlead flash. Interlead flash shall not exceed 0.25 mm, per side. 5. Reference JEDEC registration MO-153, variation AET. www.ti.com

EXAMPLE BOARD LAYOUT PWP0028A PowerPAD T M - 1.1 mm max height PLASTIC SMALL OUTLINE (3.4) NOTE 9 (3) SOLDER 28X (1.5) MASK SOLDER MASK OPENING DEFINED PAD 28X (1.3) 28X (0.45) 28X (0.45) 1 28 26X (0.65) SYMM (5.5) (9.7) SOLDER MASK OPENING (1.3) TYP 14 15 SEE DETAILS (1.3) ( 0.2) TYP (0.9) TYP VIA SYMM (6.1) METAL COVERED (0.65) TYP BY SOLDER MASK HV / ISOLATION OPTION 0.9 CLEARANCE CREEPAGE (5.8) OTHER DIMENSIONS IDENTICAL TO IPC-7351 IPC-7351 NOMINAL 0.65 CLEARANCE CREEPAGE LAND PATTERN EXAMPLE SCALE:6X SOLDER MASK METAL METAL UNDER SOLDER MASK OPENING SOLDER MASK OPENING 0.05 MAX 0.05 MIN ALL AROUND ALL AROUND NON SOLDER MASK SOLDER MASK DEFINED DEFINED SOLDER MASK DETAILS 4214870/A 10/2014 NOTES: (continued) 6. Publication IPC-7351 may have alternate designs. 7. Solder mask tolerances between and around signal pads can vary based on board fabrication site. 8. This package is designed to be soldered to a thermal pad on the board. For more information, see Texas Instruments literature numbers SLMA002 (www.ti.com/lit/slma002) and SLMA004 (www.ti.com/lit/slma004). 9. Size of metal pad may vary due to creepage requirement. www.ti.com

EXAMPLE STENCIL DESIGN PWP0028A PowerPAD T M - 1.1 mm max height PLASTIC SMALL OUTLINE (3) BASED ON 0.127 THICK METAL COVERED 28X (1.5) STENCIL BY SOLDER MASK 28X (1.3) 28X (0.45) 1 28 26X (0.65) 28X (0.45) SYMM (5.5) BASED ON 0.127 THICK STENCIL 14 15 SEE TABLE FOR SYMM DIFFERENT OPENINGS FOR OTHER STENCIL (6.1) THICKNESSES (5.8) HV / ISOLATION OPTION 0.9 CLEARANCE CREEPAGE IPC-7351 NOMINAL OTHER DIMENSIONS IDENTICAL TO IPC-7351 0.65 CLEARANCE CREEPAGE SOLDER PASTE EXAMPLE EXPOSED PAD 100% PRINTED SOLDER COVERAGE AREA SCALE:6X STENCIL SOLDER STENCIL THICKNESS OPENING 0.1 3.55 X 6.37 0.127 3.0 X 5.5 (SHOWN) 0.152 2.88 X 5.16 0.178 2.66 X 4.77 4214870/A 10/2014 NOTES: (continued) 10. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate design recommendations. 11. Board assembly site may have different recommendations for stencil design. www.ti.com

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