Product Sample & Technical Tools & Support & Reference Folder Buy Documents Software Community Design TL1431,TL1431M SLVS062N–DECEMBER1991–REVISEDOCTOBER2016 TL1431 Precision Programmable Reference 1 Features 3 Description • 0.4%InitialVoltageTolerance The TL1431 device is a precision programmable 1 reference with specified thermal stability over • 0.2-ΩTypicalOutputImpedance automotive, commercial, and military temperature • FastTurnon(500ns) ranges. The output voltage can be set to any value • SinkCurrentCapability(1mAto100mA) between VI(ref) (approximately 2.5 V) and 36 V with two external resistors (see Figure 25). This device • LowReferenceCurrent(REF) has a typical output impedance of 0.2 Ω. Active • AdjustableOutputVoltage(VI(ref)to36V) output circuitry provides a sharp turnon characteristic, makingthedeviceanexcellentreplacementforZener 2 Applications diodes and other types of references in applications such as onboard regulation, adjustable power • AdjustableVoltageandCurrentReferencing supplies,andswitchingpowersupplies. • SecondarySideRegulationinFlybackSMPSs The TL1431C is characterized for operation over the • ZenerReplacement commercial temperature range of 0°C to 70°C. The • VoltageMonitoring TL1431Q is characterized for operation over the full • ComparatorWithIntegratedReference automotive temperature range of –40°C to 125°C. The TL1431M is characterized for operation over the fullmilitarytemperaturerangeof–55°Cto125°C. DeviceInformation(1) PARTNUMBER PACKAGE BODYSIZE(NOM) TL1431D SOIC(8) 3.90mm×4.90mm TL1431PW TSSOP(8) 4.40mm×3.00mm TL1431LP TO-92(3) 4.83mm×3.68mm TL1431MJG CDIP(8) 9.58mmx6.67mm TL1431MFK LCCC(20) 8.89mmx8.89mm (1) For all available packages, see the orderable addendum at theendofthedatasheet. SimplifiedSchematic Input VKA IKA Vref Copyright © 2016,Texas Instruments Incorporated 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

TL1431,TL1431M SLVS062N–DECEMBER1991–REVISEDOCTOBER2016 www.ti.com Table of Contents 1 Features.................................................................. 1 8.4 DeviceFunctionalModes........................................14 2 Applications........................................................... 1 9 ApplicationandImplementation........................ 15 3 Description............................................................. 1 9.1 ApplicationInformation............................................15 4 RevisionHistory..................................................... 2 9.2 TypicalApplication..................................................15 9.3 SystemExamples...................................................17 5 PinConfigurationandFunctions......................... 3 10 PowerSupplyRecommendations..................... 20 6 Specifications......................................................... 4 11 Layout................................................................... 20 6.1 AbsoluteMaximumRatings......................................4 6.2 ESDRatings–TL1431C,TL1431Q..........................4 11.1 LayoutGuidelines.................................................20 6.3 RecommendedOperatingConditions.......................4 11.2 LayoutExample....................................................20 6.4 ThermalInformation..................................................4 12 DeviceandDocumentationSupport................. 21 6.5 ElectricalCharacteristics–TL1431C........................5 12.1 DocumentationSupport........................................21 6.6 ElectricalCharacteristics–TL1431Q........................6 12.2 RelatedLinks........................................................21 6.7 ElectricalCharacteristics–TL1431M.......................7 12.3 ReceivingNotificationofDocumentationUpdates21 6.8 TypicalCharacteristics..............................................8 12.4 CommunityResources..........................................21 7 ParameterMeasurementInformation................10 12.5 Trademarks...........................................................21 12.6 ElectrostaticDischargeCaution............................21 8 DetailedDescription............................................ 12 12.7 Glossary................................................................21 8.1 Overview ................................................................12 13 Mechanical,Packaging,andOrderable 8.2 FunctionalBlockDiagram.......................................12 Information........................................................... 21 8.3 FeatureDescription................................................13 4 Revision History ChangesfromRevisionM(April2012)toRevisionN Page • AddedDeviceInformationtable,ESDRatingstable,FeatureDescriptionsection,DeviceFunctionalModes, ApplicationandImplementationsection,PowerSupplyRecommendationssection,Layoutsection,Deviceand DocumentationSupportsection,andMechanical,Packaging,andOrderableInformationsection....................................... 1 • DeletedORDERINGINFORMATIONtable;seePOAattheendofthedatasheet.............................................................. 1 • ChangedR forD,LPandPWpackagefrom:97°C/Wto114.7°C/W(D),140°C/Wto157°C/W(LP)and149 θJA °C/Wto172.4°C/W(PW)intheThermalInformationtable.................................................................................................. 4 • ChangedR forFKandJGpackagefrom:5.61°C/Wto9.5°C/W(FK)and14.5°C/Wto9.5°C/W(JG)inthe θJC(bot) ThermalInformationtable....................................................................................................................................................... 4 ChangesfromRevisionL(October2007)toRevisionM Page • AddedAmmooptiontotheLPpackageintheORDERINGINFORMATIONtable............................................................... 2 2 SubmitDocumentationFeedback Copyright©1991–2016,TexasInstrumentsIncorporated ProductFolderLinks:TL1431 TL1431M

TL1431,TL1431M www.ti.com SLVS062N–DECEMBER1991–REVISEDOCTOBER2016 5 Pin Configuration and Functions DPackage 8-PinSOIC LPPackage TopView 3-PinTO-92 TopView CATHODE 1 8 REF CATHODE ANODE 2 7 ANODE ANODE ANODE 3 6 ANODE REF NC 4 5 NC Not to scale FKPackage ANODEterminalsareconnectedinternally 20-PinLCCC TopView JGorPWPackage E D 8-PinCDIPorTSSOP O TopView H T F C A C E C N C N R N CATHODE 1 8 REF NC 2 7 NC 3 2 1 0 9 NC 3 6 ANODE 2 1 NC 4 18 NC NC 4 5 NC NC 5 17 NC NC 6 16 NC Not to scale NC 7 15 ANODE NC 8 14 NC 0 1 2 3 9 1 1 1 1 C C C C C N N N N N Not to scale PinFunctions PIN CDIP, I/O DESCRIPTION NAME SOIC TO-92 LCCC TSSOP ANODE 2,3,6,7 6 2 15 O Commonpin,normallyconnectedtoground CATHODE 1 1 1 2 I/O Shuntcurrent/voltageinput REF 8 8 3 20 I Thresholdrelativetocommonground 1,3,4,5,6,7,8,9,10,11, NC 4,5 2,3,4,5,7 — — Nointernalconnection 12,13,14,16,17,18,19 Copyright©1991–2016,TexasInstrumentsIncorporated SubmitDocumentationFeedback 3 ProductFolderLinks:TL1431 TL1431M

TL1431,TL1431M SLVS062N–DECEMBER1991–REVISEDOCTOBER2016 www.ti.com 6 Specifications 6.1 Absolute Maximum Ratings overoperatingfree-airtemperaturerange(unlessotherwisenoted)(1) MIN MAX UNIT Cathodevoltage,V (2) 37 V KA Continuouscathodecurrent,I –100 150 mA KA Referenceinputcurrent,I –0.05 10 mA I(ref) Leadtemperature,1.6mm(1/16in)fromcasefor10s 260 °C Junctiontemperature,T 150 °C J Storagetemperature,T –65 150 °C stg (1) StressesbeyondthoselistedunderAbsoluteMaximumRatingsmaycausepermanentdamagetothedevice.Thesearestressratings only,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedunderrecommendedoperating conditionsisnotimplied.Exposuretoabsolute-maximum-ratedconditionsforextendedperiodsmayaffectdevicereliability. (2) AllvoltagevaluesarewithrespecttoANODE,unlessotherwisenoted. 6.2 ESD Ratings – TL1431C, TL1431Q VALUE UNIT Human-bodymodel(HBM),perANSI/ESDA/JEDECJS-001(1) ±2000 V Electrostaticdischarge V (ESD) Charged-devicemodel(CDM),perJEDECspecificationJESD22-C101(2) ±1000 (1) JEDECdocumentJEP155statesthat500-VHBMallowssafemanufacturingwithastandardESDcontrolprocess. (2) JEDECdocumentJEP157statesthat250-VCDMallowssafemanufacturingwithastandardESDcontrolprocess. 6.3 Recommended Operating Conditions MIN MAX UNIT V Cathodevoltage V 36 V KA I(ref) I Cathodecurrent 1 100 mA KA TL1431C 0 70 T Operatingfree-airtemperature TL1431Q –40 125 °C A TL1431M –55 125 6.4 Thermal Information TL1431 TL1431M(2) THERMALMETRIC(1) LP D PW JG FK UNIT (TO-92) (SOIC) (TSSOP) (CDIP) (LCCC) 3PINS 8PINS 8PINS 8PINS 20PINS Junction-to-ambientthermal R 157 114.7 172.4 — — °C/W θJA resistance Junction-to-case(top)thermal R 80.7 59 55.2 69.7 55.5 °C/W θJC(top) resistance Junction-to-boardthermal R — 55.4 100.8 99 54.2 °C/W θJB resistance Junction-to-topcharacterization ψ 24.6 12 5 — — °C/W JT parameter Junction-to-boardcharacterization ψ 136.4 54.8 99 — — °C/W JB parameter Junction-to-case(bottom)thermal R — — — 21 9.5 °C/W θJC(bot) resistance (1) Formoreinformationabouttraditionalandnewthermalmetrics,seetheSemiconductorandICPackageThermalMetricsapplication report. (2) R basedonMIL-STD-883,andR basedonJESD51. θJC θJB 4 SubmitDocumentationFeedback Copyright©1991–2016,TexasInstrumentsIncorporated ProductFolderLinks:TL1431 TL1431M

TL1431,TL1431M www.ti.com SLVS062N–DECEMBER1991–REVISEDOCTOBER2016 6.5 Electrical Characteristics – TL1431C atspecifiedfree-airtemperatureandI =10mA(unlessotherwisenoted) KA PARAMETER TESTCONDITIONS MIN TYP MAX UNIT V Referenceinputvoltage VKA=VI(ref) TA=25°C 2490 2500 2510 mV I(ref) (seeFigure13) T =0°Cto70°C 2480 2520 A Deviationofreferenceinputvoltage V =V ,T =0°Cto70°C VI(dev) overfulltemperaturerange(1) (sKeAeFigIu(rreef)13A) 4 20 mV ∆∆VVI(ref) Rvoalttiaogoeftcohtahnegcehiannrgeefeirnecnactehoindpeut Δ(sVeKeAF=ig3urVet1o43)6V,TA=0°Cto70°C –1.1 –2 mV/V KA voltage R1=10kΩ,R2=∞ TA=25°C 1.5 2.5 I Referenceinputcurrent µA I(ref) (seeFigure14) T =0°Cto70°C 3 A Deviationofreferenceinputcurrent R1=10kΩ,R2=∞,T =0°Cto70°C II(dev) overfulltemperaturerange(1) (seeFigure14) A 0.2 1.2 µA I Minimumcathodecurrentforregulation V =V ,T =25°C(seeFigure13) 0.45 1 mA min KA I(ref) A I Off-statecathodecurrent VKA=36V,VI(ref)=0 TA=25°C 0.18 0.5 µA off (seeFigure15) T =0°Cto70°C 2 A V =V ,f≤1kHz, KA I(ref) |z | Outputimpedance(2) I =1mAto100mA,T =25°C 0.2 0.4 Ω KA KA A (seeFigure13) (1) ThedeviationparametersV andI aredefinedasthedifferencesbetweenthemaximumandminimumvaluesobtainedoverthe I(dev) I(dev) ratedtemperaturerange.Theaveragefull-rangetemperaturecoefficientofthereferenceinputvoltageα isdefinedas: ( VI(dev) ( VI(ref) ° × 106 α (ppm( VI(ref)at25 C MaxVI(ref) VI(ref) °C = T A where: VI(dev) ∆TAis the rated operating temperature range of the device. MinVI(ref) ˙TA α ispositiveornegative,dependingonwhetherminimumV ormaximumV ,respectively,occursatthelowertemperature. VI(ref) ∆V I(ref) I(ref) |z | = KA (2) Theoutputimpedanceisdefinedas: KA ∆IKA Whenthedeviceisoperatingwithtwoexternalresistors(seeFigure2),thetotaldynamicimpedanceofthecircuitisgivenby: ∆V ( R1( |z'| = ∆I ,whichisapproximatelyequalto |zKA|1 +R2 . Copyright©1991–2016,TexasInstrumentsIncorporated SubmitDocumentationFeedback 5 ProductFolderLinks:TL1431 TL1431M

TL1431,TL1431M SLVS062N–DECEMBER1991–REVISEDOCTOBER2016 www.ti.com 6.6 Electrical Characteristics – TL1431Q atspecifiedfree-airtemperatureandI =10mA(unlessotherwisenoted) KA PARAMETER TESTCONDITIONS MIN TYP MAX UNIT V Referenceinputvoltage VKA=VI(ref) TA=25°C 2490 2500 2510 mV I(ref) (seeFigure13) T =–40°Cto125°C 2470 2530 A Deviationofreferenceinputvoltage V =V ,T =–40°Cto125°C VI(dev) overfulltemperaturerange(1) (sKeAeFigIu(rreef)13A) 17 55 mV ∆∆VVI(ref) Rvoalttiaogoeftcohtahnegcehiannrgeefeirnecnactehoindpeut Δ(sVeKeAF=ig3urVet1o43)6V,TA=–40°Cto125°C –1.1 –2 mV/V KA voltage R1=10kΩ,R2=∞ TA=25°C 1.5 2.5 I Referenceinputcurrent µA I(ref) (seeFigure14) T =–40°Cto125°C 4 A Deviationofreferenceinputcurrent R1=10kΩ,R2=∞,T =–40°Cto125°C II(dev) overfulltemperaturerange(1) (seeFigure14) A 0.5 2 µA Minimumcathodecurrentfor I V =V ,T =25°C(seeFigure13) 0.45 1 mA min regulation KA I(ref) A I Off-statecathodecurrent VKA=36V,VI(ref)=0 TA=25°C 0.18 0.5 µA off (seeFigure15) T =–40°Cto125°C 2 A V =V ,f≤1kHz, KA I(ref) |z | Outputimpedance(2) I =1mAto100mA,T =25°C 0.2 0.4 Ω KA KA A (seeFigure13) (1) ThedeviationparametersV andI aredefinedasthedifferencesbetweenthemaximumandminimumvaluesobtainedoverthe I(dev) I(dev) ratedtemperaturerange.Theaveragefull-rangetemperaturecoefficientofthereferenceinputvoltageα isdefinedas: ( VI(dev) ( VI(ref) ° × 106 α (ppm( VI(ref)at25 C MaxVI(ref) VI(ref) °C = T A where: VI(dev) ∆TAis the rated operating temperature range of the device. MinVI(ref) ˙TA α ispositiveornegative,dependingonwhetherminimumV ormaximumV ,respectively,occursatthelowertemperature. VI(ref) ∆V I(ref) I(ref) |z | = KA (2) Theoutputimpedanceisdefinedas: KA ∆IKA Whenthedeviceisoperatingwithtwoexternalresistors(seeFigure2),thetotaldynamicimpedanceofthecircuitisgivenby: ∆V ( R1( |z'| = ∆I ,whichisapproximatelyequalto |zKA|1 +R2 . 6 SubmitDocumentationFeedback Copyright©1991–2016,TexasInstrumentsIncorporated ProductFolderLinks:TL1431 TL1431M

TL1431,TL1431M www.ti.com SLVS062N–DECEMBER1991–REVISEDOCTOBER2016 6.7 Electrical Characteristics – TL1431M atspecifiedfree-airtemperatureandI =10mA(unlessotherwisenoted) KA PARAMETER TESTCONDITIONS MIN TYP MAX UNIT V Referenceinputvoltage VKA=VI(ref) TA=25°C 2475 2500 2540 mV I(ref) (seeFigure13) T =–55°Cto125°C 2460 2550 A VI(dev) Doveevriafutiollnteomfpreefrearteunrecerainnpguet(1v)oltage V(sKeAe=FVigIu(rreef),1T3A)=–55°Cto125°C 17 55(2) mV ∆∆VVI(ref) Rvoalttiaogoeftcohtahnegcehiannrgeefeirnecnactehoindpeut Δ(sVeKeAF=ig3urVet1o43)6V,TA=–55°Cto125°C –1.1 –2 mV/V KA voltage R1=10kΩ,R2=∞ TA=25°C 1.5 2.5 I Referenceinputcurrent µA I(ref) (seeFigure14) T =–55°Cto125°C 5 A II(dev) Doveevriafutiollnteomfpreefrearteunrecerainnpguet(1c)urrent R(s1ee=F1i0gukrΩe,1R42) =∞,TA=–55°Cto125°C 0.5 3(2) µA Minimumcathodecurrentfor I V =V ,T =25°C(seeFigure13) 0.45 1 mA min regulation KA I(ref) A I Off-statecathodecurrent VKA=36V,VI(ref)=0 TA=25°C 0.18 0.5 µA off (seeFigure15) T =–55°Cto125°C 2 A V =V ,f≤1kHz, KA I(ref) |z | Outputimpedance(3) I =1mAto100mA,T =25°C 0.2 0.4 Ω KA KA A (seeFigure13) (1) ThedeviationparametersV andI aredefinedasthedifferencesbetweenthemaximumandminimumvaluesobtainedoverthe I(dev) I(dev) ratedtemperaturerange.Theaveragefull-rangetemperaturecoefficientofthereferenceinputvoltageα isdefinedas: ( VI(dev) ( VI(ref) ° × 106 α (ppm( VI(ref)at25 C MaxVI(ref) VI(ref) °C = T A where: VI(dev) ∆TAis the rated operating temperature range of the device. MinVI(ref) ˙TA α ispositiveornegative,dependingonwhetherminimumV ormaximumV ,respectively,occursatthelowertemperature. VI(ref) I(ref) I(ref) (2) OnproductscomplianttoMIL-PRF-38535,thisparameterisnotproductiontested. ∆V |z | = KA (3) Theoutputimpedanceisdefinedas: KA ∆IKA Whenthedeviceisoperatingwithtwoexternalresistors(seeFigure2),thetotaldynamicimpedanceofthecircuitisgivenby: ∆V ( R1( |z'| = ∆I ,whichisapproximatelyequalto |zKA|1 +R2 . Copyright©1991–2016,TexasInstrumentsIncorporated SubmitDocumentationFeedback 7 ProductFolderLinks:TL1431 TL1431M

TL1431,TL1431M SLVS062N–DECEMBER1991–REVISEDOCTOBER2016 www.ti.com 6.8 Typical Characteristics Dataathighandlowtemperaturesareapplicableonlywithintherecommendedoperatingfree-airtemperaturerangesofthe variousdevices. Table1.TableOfGraphs GRAPH FIGURE ReferencevoltagevsFree-airtemperature Figure1 ReferencecurrentvsFire-airtemperature Figure2 CathodecurrentvsCathodevoltage Figure3,Figure4 Off-statecathodecurrentvsFree-airtemperature Figure5 RatioofdeltareferencevoltagetodeltacathodevoltagevsFree-airtemperature Figure6 Equivalentinput-noisevoltagevsFrequency Figure7 Equivalentinput-noisevoltageovera10-secondperiod Figure8 Small-signalvoltageamplificationvsFrequency Figure9 ReferenceimpedancevsFrequency Figure10 Pulseresponse Figure11 Stabilityboundaryconditions Figure12 2.52 2.5 VI(ref)= VKA IKA= 10 mA IKA= 10 mA RR12 == ∞10 kΩ V A 2 − 2.51 µ e − ag nt olte V Curre 1.5 erenc 2.5 ence Ref efer 1 − R VI(ref) 2.49 −II(ref) 0.5 2.48 0 −50 −25 0 25 50 75 100 125 −50 −25 0 25 50 75 100 125 TA−Free-Air Temperature−°C TA−Free-Air Temperature−°C Figure1.ReferenceVoltagevsFree-AirTemperature Figure2.ReferenceCurrentvsFree-AirTemperature 150 800 VKA= VI(ref) VKA= VI(ref) TA= 25°C TA= 25°C 100 600 mA µA − 50 − nt nt e e 400 urr urr e C 0 e C d d o o Cath −50 Cath 200 − − A A K K I I 0 −100 −150 −200 −3 −2 −1 0 1 2 3 −2 −1 0 1 2 3 4 VKA−Cathode Voltage−V VKA−Cathode Voltage−V Figure3.CathodeCurrentvsCathodeVoltage Figure4.CathodeCurrentvsCathodeVoltage 8 SubmitDocumentationFeedback Copyright©1991–2016,TexasInstrumentsIncorporated ProductFolderLinks:TL1431 TL1431M

TL1431,TL1431M www.ti.com SLVS062N–DECEMBER1991–REVISEDOCTOBER2016 0.4 −0.85 VKA= 36 V VKA= 3 V to 36 V µA 0.35 VI(ref)= 0 −0.95 − nt 0.3 e de Curr 0.25 −mV/V −1.05 o A h K Off-State Cat 00.1.25 ∆/∆VVI(ref) −−11..1255 − 0.1 off) −1.35 KA( 0.05 I 0 −1.45 −50 −25 0 25 50 75 100 125 −50 −25 0 25 50 75 100 125 TA−Free-Air Temperature−°C TA−Free-Air Temperature−°C Figure5.Off-StateCathodeCurrentvsFree-AirTemperature Figure6.RatioOfDeltaReferenceVoltage ToDeltaCathodeVoltagevsFree-AirTemperature 260 6 Hz 240 ITOA== 1205 °mCA V 5 V/ m 4 n − − 220 ge 3 e a oltagut-Noise V 128000 oltnput-Noise V −1021 −EquivaVlent Inpn 111426000 −EVquivalent In −−−−3245 fITK A=A =0= .2 115 0t°o Cm 1A0 Hz 100 −6 10 100 1 k 10 k 100 k 0 2 4 6 8 10 f−Frequency−Hz t−Time−s Figure7.EquivalentInput-NoiseVoltagevsFrequency Figure8.EquivalentInput-NoiseVoltage OverA10-SPeriod 60 100 −dB TIKAA== 2150° CmA ITKAA== 2 15 °mCAto 100 mA n 50 WO o mplificati 40 edance− 10 A mp oltagngeal V 3200 Reference I 1 Si − Small- 10 |zka ||zKA − V A 0 0.1 1 k 10 k 100 k 1 M 10 M 1 k 10 k 100 k 1 M 10 M f−Frequency−Hz f−Frequency−Hz Figure9.Small-SignalVoltageAmplificationvsFrequency Figure10.ReferenceImpedancevsFrequency Copyright©1991–2016,TexasInstrumentsIncorporated SubmitDocumentationFeedback 9 ProductFolderLinks:TL1431 TL1431M

TL1431,TL1431M SLVS062N–DECEMBER1991–REVISEDOCTOBER2016 www.ti.com 6 100 5 TA= 25°C Input 90 ABC---VVVKKKAAA=== V510 IV( rVef) ITKAA== 2150° CmA V A 80 D-VKA= 15 V − m ages 4 nt− 70 Stable oltd Output V 3 Output athode Curre 546000 Stable B C Input an 21 −CIKA 3200 A D 10 0 0 0 1 2 3 4 5 6 7 0.001 0.01 0.1 1 10 t−Time−µs CL−Load Capacitance−µF Theareasunderthecurvesrepresentconditionsthatmaycausethe devicetooscillate.ForcurvesB,C,andD,R2andV+areadjusted toestablishtheinitialV andI conditions,withC =0.V and KA KA L BATT C thenareadjustedtodeterminetherangesofstability. L Figure11.PulseResponse Figure12.StabilityBoundaryConditions 7 Parameter Measurement Information Input VKA Input VKA IKA IKA R1 II(ref) VI(ref) R2 VI(ref) V = V æç1+ R1ö÷ +I ´R1 KA I(ref) I(ref) è R2ø Figure13.TestCircuitForV =V Figure14.TestCircuitForV >V (KA) ref (KA) ref Input VKA 19.1 V 1 kW Ioff 500µF 910W 2000µF VCC VCC TL1431 (DUT) 820W + TALVE=2 1002 7V/mV 1mF + TLE2027 106.W1µF 160 kW− 16W 116WµF 333 k3 Wk−W AV= 2 V/V 2.2µFCRO1 MW VEE VEE Copyright © 2016,Texas Instruments Incorporated Figure15.TestCircuitForI Figure16.TestCircuitFor0.1-HzTo10-Hz off EquivalentInput-NoiseVoltage 10 SubmitDocumentationFeedback Copyright©1991–2016,TexasInstrumentsIncorporated ProductFolderLinks:TL1431 TL1431M

TL1431,TL1431M www.ti.com SLVS062N–DECEMBER1991–REVISEDOCTOBER2016 Parameter Measurement Information (continued) Output 1 kW I(K) Output 15 kW 230W I(K) 9mF + 50W − 8.25 kW − + GND GND Figure17.TestCircuitForVoltageAmplification Figure18.TestCircuitForReferenceImpedance VI 220W 150W Output IKA VI + Pulse CL VBATT Generator 50W − f = 100 kHz GND Test Circuit for CurveA R1 = IKA 10 kW 150W CL VI + R2 VBATT − Test Circuit for Curves B, C, and D Figure19.TestCircuitForPulseResponse Figure20.TestCircuitsForCurvesAThroughD Copyright©1991–2016,TexasInstrumentsIncorporated SubmitDocumentationFeedback 11 ProductFolderLinks:TL1431 TL1431M

TL1431,TL1431M SLVS062N–DECEMBER1991–REVISEDOCTOBER2016 www.ti.com 8 Detailed Description 8.1 Overview The TL1431 device has proven ubiquity and versatility across a wide range of applications, ranging from power to signal path. This is due to its key components containing an accurate voltage reference and op amp, which are very fundamental analog building blocks. TL1431 is used in conjunction with its key components to behave as a single voltage reference, error amplifier, voltage clamp, or comparator with integrated reference. TL1431 can be operated and adjusted to cathode voltages from 2.5 V to 36 V, making this part optimum for a wide range of end equipments in industrial, auto, telecom, and computing. In order for this device to behave as a shunt regulator or error amplifier, >1 mA (Imin(max)) must be supplied in to the cathode pin. Under this condition, feedback can be applied from the Cathode and Ref pins to create a replica of the internal reference voltage. Various reference voltage options can be purchased with initial tolerances (at 25°C) of 0.4% and 1%. The TL1431C devices are characterized for operation from 0°C to 70°C, the TL1431Q devices are characterized for operationfrom–40°Cto125°C,andtheTL1431Mdevicesarecharacterizedforoperationfrom –55°Cto125°C. 8.2 Functional Block Diagram CATHODE REF + – VREF ANODE Copyright © 2016, Texas Instruments Incorporated Figure21. EquivalentSchematic 12 SubmitDocumentationFeedback Copyright©1991–2016,TexasInstrumentsIncorporated ProductFolderLinks:TL1431 TL1431M

TL1431,TL1431M www.ti.com SLVS062N–DECEMBER1991–REVISEDOCTOBER2016 Functional Block Diagram (continued) 1 CATHODE 800Ω 800Ω 8 20 pF REF 150Ω 3.28 kΩ 4 kΩ 10 kΩ 2.4 kΩ 7.2 kΩ 20 pF 1 kΩ 800Ω 2, 3, 6, 7 ANODE Copyright © 2016,Texas Instruments Incorporated (1) Allcomponentvaluesarenominal. (2) PinnumbersshownarefortheDpackage. Figure22. DetailedSchematic 8.3 Feature Description TL1431consistsofaninternalreferenceandamplifierthatoutputsasinkcurrentbaseonthedifferencebetween the reference pin and the virtual internal pin. The sink current is produced by the internal Darlington pair, shown in Figure 22. A Darlington pair is used in order for this device to be able to sink a maximum current of 100 mA. When operated with enough voltage headroom (≥ 2.5 V) and cathode current (I ), TL1431 forces the reference KA pin to 2.5 V. However, the reference pin can not be left floating, as it needs I ≥ 5 µA (see Electrical REF Characteristics–TL1431M).Thisisbecausethereferencepinisdrivenintoannpn,whichneedsbasecurrentto operate properly. When feedback is applied from the cathode and reference pins, TL1431 behaves as a Zener diode, regulating to a constant voltage dependent on current being supplied into the cathode. This is due to the internalamplifierandreferenceenteringtheproperoperatingregions.Thesameamountofcurrentneededinthe above feedback situation must be applied to this device in open loop, servo, or error amplifying implementations in order for it to be in the proper linear region giving TL1431 enough gain. Unlike many linear regulators, TL1431 is internally compensated to be stable without an output capacitor between the cathode and anode. However, if desired an output capacitor can be used as a guide to assist in choosing the correct capacitor to maintain stability. Copyright©1991–2016,TexasInstrumentsIncorporated SubmitDocumentationFeedback 13 ProductFolderLinks:TL1431 TL1431M

TL1431,TL1431M SLVS062N–DECEMBER1991–REVISEDOCTOBER2016 www.ti.com 8.4 Device Functional Modes 8.4.1 OpenLoop(Comparator) When the cathode or output voltage or current of TL1431 is not being fed back to the reference or input pin in any form, this device is operating in open loop. With proper cathode current (I ) applied to this device, TL1431 KA has the characteristics shown in Figure 22. With such high gain in this configuration, TL1431 is typically used as acomparator.WiththereferenceintegratedmakesTL1431thepreferredchoicewhenusersaretryingtomonitor acertainlevelofasinglesignal. 8.4.2 ClosedLoop When the cathode or output voltage or current of TL1431 is being fed back to the reference or input pin in any form, this device is operating in closed loop. The majority of applications involving TL1431 use it in this manner to regulate a fixed voltage or current. The feedback enables this device to behave as an error amplifier, computing a portion of the output voltage and adjusting it to maintain the desired regulation. This is done by relating the output voltage back to the reference pin in a manner to make it equal to the internal reference voltage,whichcanbeaccomplishedthroughresistiveordirectfeedback. 14 SubmitDocumentationFeedback Copyright©1991–2016,TexasInstrumentsIncorporated ProductFolderLinks:TL1431 TL1431M

TL1431,TL1431M www.ti.com SLVS062N–DECEMBER1991–REVISEDOCTOBER2016 9 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validateandtesttheirdesignimplementationtoconfirmsystemfunctionality. 9.1 Application Information As the TL1431 device has many applications and setups, there are many situations that this datasheet cannot characterize in detail. The linked application notes help the designer make the best choices when using this part. Understanding Stability Boundary Conditions Charts in TL431, TL432 Data Sheet (SLVA482) provides a deeper understanding of this devices stability characteristics and aid the user in making the right choices when choosing a load capacitor. Setting the Shunt Voltage on an Adjustable Shunt Regulator (SLVA445) assists designers in settingtheshuntvoltagetoachieveoptimumaccuracyforthisdevice. 9.2 Typical Application Rsup Vo = (1+ R1/R2) Vref Vsup R1 0.1% CATHODE REF Cl R2 ANODE 0.1% Copyright © 2016, Texas Instruments Incorporated Figure23. ComparatorApplicationSchematic 9.2.1 DesignRequirements Forthisdesignexample,usetheparameterslistedinTable2astheinputparameters. Table2.DesignParameters PARAMETER VALUE Referenceinitialaccuracy 0.4% Supplyvoltage 48V Cathodecurrent(I ) 50µA K Outputvoltagelevel 2.5Vto36V Loadcapacitance 1nF Feedbackresistorvaluesand 10kΩ accuracy(R1andR2) 9.2.2 DetailedDesignProcedure WhenusingTL1431asashuntregulator,determinethefollowing: • Inputvoltagerange • Temperaturerange • Totalaccuracy • Cathodecurrent Copyright©1991–2016,TexasInstrumentsIncorporated SubmitDocumentationFeedback 15 ProductFolderLinks:TL1431 TL1431M

TL1431,TL1431M SLVS062N–DECEMBER1991–REVISEDOCTOBER2016 www.ti.com • Referenceinitialaccuracy • Outputcapacitance 9.2.2.1 ProgrammingOutput/CathodeVoltage To program the cathode voltage to a regulated voltage a resistive bridge must be shunted between the cathode and anode pins with the mid point tied to the reference pin. This can be seen in Figure 23, with R1 and R2 being the resistive bridge. The cathode/output voltage in the shunt regulator configuration can be approximated by the equation shown in Figure 23. The cathode voltage can be more accurately determined by taking in to account thecathodecurrentwithEquation1. Vo=(1+R1/R2)×V –I ×R1 (1) REF REF For this equation to be valid, TL1431 must be fully biased so that it has enough open loop gain to mitigate any gainerror.ThiscanbedonebymeetingtheIminspecificationdenotedinElectricalCharacteristics – TL1431M. 9.2.2.2 TotalAccuracy When programming the output above unity gain (V =V ), TL1431 is susceptible to other errors that may effect KA REF theoverallaccuracybeyondV .Theseerrorsinclude: REF • R1andR2accuracies • V –Changeinreferencevoltageovertemperature I(dev) • ΔV / ΔV – Changeinreferencevoltagetothechangeincathodevoltage REF KA • |z |–Dynamicimpedance,causingachangeincathodevoltagewithcathodecurrent KA Worstcasecathodevoltagecanbedeterminedtakingallofthevariablesintoaccount. 9.2.2.3 Stability Though TL1431 is stable with no capacitive load, the device that receives the shunt regulator's output voltage could present a capacitive load that is within the TL1431 region of stability, shown in Figure 12. Also, designers may use capacitive loads to improve the transient response or for power supply decoupling. When using additionalcapacitancebetweenCathodeandAnode,refertoFigure12. 9.2.2.4 Start-upTime As shown in Figure 24, TL1431 has a fast response up to approximately 2 V and then slowly charges to its programmed value. This is due to the compensation capacitance the TL1431 has to meet its stability criteria. Despitethesecondarydelay,TL1431stillhasafastresponsesuitableformanyclampapplications. 9.2.3 ApplicationCurve 6 TA= 25°C Input 5 V − s e 4 g a olt V ut 3 utp Output O d n 2 a ut p n I 1 0 0 1 2 3 4 5 6 7 t−Time−µs Figure24.TL1431Start-upResponse 16 SubmitDocumentationFeedback Copyright©1991–2016,TexasInstrumentsIncorporated ProductFolderLinks:TL1431 TL1431M

TL1431,TL1431M www.ti.com SLVS062N–DECEMBER1991–REVISEDOCTOBER2016 9.3 System Examples Table3listsexamplecircuitsoftheTL1431. Table3.TableOfExampleCircuits APPLICATION FIGURE Shuntregulator Figure25 Single-supplycomparatorwithtemperature-compensatedthreshold Figure26 Precisionhigh-currentseriesregulator Figure27 Outputcontrolofathree-terminalfixedregulator Figure28 Higher-currentshuntregulator Figure29 Crowbar Figure30 Precision5-V,1.5-A,0.5%regulator Figure31 5-Vprecisionregulator Figure32 PWMconverterwith0.5%reference Figure33 Voltagemonitor Figure34 Delaytimer Figure35 Precisioncurrentlimiter Figure36 Precisionconstant-currentsink Figure37 R V(BATT) V(BATT) VO R1 0.1% VO VI(ref) TL1431 Von≈2 V Voff ≈V(BATT) R2 0.1% Input TL1431 VIT= 2.5 V æ R1ö VO =çè1+R2÷øVI(ref) GND Copyright © 2016,Texas Instruments Incorporated Copyright © 2016,Texas Instruments Incorporated Rmustprovidecathodecurrent≥1mAtotheTL1431atminimum V . (BATT) Figure25.ShuntRegulator Figure26.Single-SupplyComparator WithTemperature-CompensatedThreshold Copyright©1991–2016,TexasInstrumentsIncorporated SubmitDocumentationFeedback 17 ProductFolderLinks:TL1431 TL1431M

TL1431,TL1431M SLVS062N–DECEMBER1991–REVISEDOCTOBER2016 www.ti.com V(BATT) V(BATT) In Out R 2N2222 µA7805 VO 30Ω 2N2222 Common R1 TL1431 0.01µF 4.7 kΩ TL1431 R2 VO R1 R2 0.1% 0.1% æ R1ö æ R1ö V=çè1+R2÷øVI(ref) VO =çè1+R2÷øVI(ref) MinV=VI(ref) +5V Copyright © 2016,Texas Instruments Incorporated Copyright © 2016,Texas Instruments Incorporated Rmustprovidecathodecurrent≥1mAtotheTL1431atminimum V . (BATT) Figure27.PrecisionHigh-CurrentSeriesRegulator Figure28.OutputControlOfA Three-TerminalFixedRegulator V(BATT) R VO V(BATT) VO R1 R1 TL1431 C R2 R2 TL1431 æ R1ö V =æç1+ R1ö÷V Vtrip =çè1+R2÷øVI(ref) O I(ref) è R2ø Copyright © 2016,Texas Instruments Incorporated Copyright © 2016,Texas Instruments Incorporated SeethestabilityboundaryconditionsinFigure12todetermine allowablevaluesforC. Figure29.Higher-CurrentShuntRegulator Figure30.Crowbar In Out V(BATT) VO= 5 V V(BATT) LM317 VO= 5 V, 1.5A, 0.5% 8.2 kΩ Rb Adjust 243Ω 27.4 kΩ 0.1% 0.1% TL1431 TL1431 243Ω 0.1% 27.4 kΩ 0.1% Copyright © 2016,Texas Instruments Incorporated Copyright © 2016,Texas Instruments Incorporated R mustprovidecathodecurrent≥1mAtotheTL1431. b Figure31.Precision5-V,1.5-A,0.5%Regulator Figure32.5-VPrecisionRegulator 18 SubmitDocumentationFeedback Copyright©1991–2016,TexasInstrumentsIncorporated ProductFolderLinks:TL1431 TL1431M

TL1431,TL1431M www.ti.com SLVS062N–DECEMBER1991–REVISEDOCTOBER2016 12 V R3 V(BATT) 6.8 kΩ VCC R1A R1B R4 5 V +0.5% 10 kΩ − TL1431 TL1431 TL1431 10 kΩ + 0.1% X Not TL598 R2A R2B Used 10 kΩ 0.1% æ R1Bö Feedback LowLimit=çè1+R2B÷øVI(ref) LED on When Copyright © 2016,Texas Instruments Incorporated HighLimit=æçè1+RR21AAö÷øVI(ref) Low Limit < V (BATT)< High Limit Copyright © 2016,Texas Instruments Incorporated SelectR3andR4toprovidethedesiredLEDintensityandcathode current≥1mAtotheTL1431. Figure33.PWMConverterWith0.5%Reference Figure34.VoltageMonitor 12 V 680Ω V(BATT) RCL0.1% IO 2 kΩ R1 R TL1431 TL1431 V I = I(ref) +I On C O RCL KA Off V R1= (BATT) æ I ö çèhFOE÷ø+IKA 12 V Copyright © 2016,Texas Instruments Incorporated Delay =R´C´I I(12 V) – V I(ref) Copyright © 2016,Texas Instruments Incorporated Figure35.DelayTimer Figure36.PrecisionCurrentLimiter V(BATT) IO TL1431 RS 0.1% V I = I(ref) O R S Copyright © 2016,Texas Instruments Incorporated Figure37.PrecisionConstant-CurrentSink Copyright©1991–2016,TexasInstrumentsIncorporated SubmitDocumentationFeedback 19 ProductFolderLinks:TL1431 TL1431M

TL1431,TL1431M SLVS062N–DECEMBER1991–REVISEDOCTOBER2016 www.ti.com 10 Power Supply Recommendations When using TL1431 as a linear regulator to supply a load, designers typically use a bypass capacitor on the output/cathode pin. When doing this, be sure that the capacitance is within the stability criteria shown in Figure 12. To not exceed the maximum cathode current, ensure the supply voltage is current limited. Also, be sure to limit the current being driven into the Ref pin, as not to exceed it's absolute maximum rating. For applications shunting high currents, pay attention to the cathode and anode trace lengths, adjusting the width of thetracestohavethepropercurrentdensity. 11 Layout 11.1 Layout Guidelines Bypass capacitors must be placed as close to the part as possible. Current-carrying traces need to have widths appropriatefortheamountofcurrenttheyarecarrying;inthecaseoftheTL1431,thesecurrentsarelow. 11.2 Layout Example CATHODE REF Vsup 1 8 Vin 2 7 ANODE GND 3 6 4 5 GND Copyright © 2016, Texas Instruments Incorporated Figure38. PWPackageLayoutExample 20 SubmitDocumentationFeedback Copyright©1991–2016,TexasInstrumentsIncorporated ProductFolderLinks:TL1431 TL1431M

TL1431,TL1431M www.ti.com SLVS062N–DECEMBER1991–REVISEDOCTOBER2016 12 Device and Documentation Support 12.1 Documentation Support 12.1.1 RelatedDocumentation Forrelateddocumentationseethefollowing: • UnderstandingStabilityBoundaryConditionsChartsinTL431,TL432DataSheet (SLVA482) • SettingtheShuntVoltageonanAdjustableShuntRegulator (SLVA445) 12.2 Related Links The table below lists quick access links. Categories include technical documents, support and community resources,toolsandsoftware,andquickaccesstosampleorbuy. Table4.RelatedLinks TECHNICAL TOOLS& SUPPORT& PARTS PRODUCTFOLDER SAMPLE&BUY DOCUMENTS SOFTWARE COMMUNITY TL1431 Clickhere Clickhere Clickhere Clickhere Clickhere TL1431M Clickhere Clickhere Clickhere Clickhere Clickhere 12.3 Receiving Notification of Documentation Updates To receive notification of documentation updates, navigate to the device product folder on ti.com. In the upper right corner, click on Alert me to register and receive a weekly digest of any product information that has changed.Forchangedetails,reviewtherevisionhistoryincludedinanyreviseddocument. 12.4 Community Resources The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of Use. TIE2E™OnlineCommunity TI'sEngineer-to-Engineer(E2E)Community.Createdtofostercollaboration amongengineers.Ate2e.ti.com,youcanaskquestions,shareknowledge,exploreideasandhelp solveproblemswithfellowengineers. DesignSupport TI'sDesignSupport QuicklyfindhelpfulE2Eforumsalongwithdesignsupporttoolsand contactinformationfortechnicalsupport. 12.5 Trademarks E2EisatrademarkofTexasInstruments. Allothertrademarksarethepropertyoftheirrespectiveowners. 12.6 Electrostatic Discharge Caution Thesedeviceshavelimitedbuilt-inESDprotection.Theleadsshouldbeshortedtogetherorthedeviceplacedinconductivefoam duringstorageorhandlingtopreventelectrostaticdamagetotheMOSgates. 12.7 Glossary SLYZ022—TIGlossary. Thisglossarylistsandexplainsterms,acronyms,anddefinitions. 13 Mechanical, Packaging, and Orderable Information The following pages include mechanical, packaging, and orderable information. This information is the most current data available for the designated devices. This data is subject to change without notice and revision of thisdocument.Forbrowser-basedversionsofthisdatasheet,refertotheleft-handnavigation. Copyright©1991–2016,TexasInstrumentsIncorporated SubmitDocumentationFeedback 21 ProductFolderLinks:TL1431 TL1431M

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) 5962-9962001Q2A ACTIVE LCCC FK 20 1 TBD POST-PLATE N / A for Pkg Type -55 to 125 5962- 9962001Q2A TL1431MFKB 5962-9962001QPA ACTIVE CDIP JG 8 1 TBD Call TI N / A for Pkg Type -55 to 125 9962001QPA TL1431M TL1431CD ACTIVE SOIC D 8 75 Green (RoHS NIPDAU Level-1-260C-UNLIM 0 to 70 1431C & no Sb/Br) TL1431CDE4 ACTIVE SOIC D 8 75 Green (RoHS NIPDAU Level-1-260C-UNLIM 0 to 70 1431C & no Sb/Br) TL1431CDG4 ACTIVE SOIC D 8 75 Green (RoHS NIPDAU Level-1-260C-UNLIM 0 to 70 1431C & no Sb/Br) TL1431CDR ACTIVE SOIC D 8 2500 Green (RoHS NIPDAU Level-1-260C-UNLIM 0 to 70 1431C & no Sb/Br) TL1431CDRE4 ACTIVE SOIC D 8 2500 Green (RoHS NIPDAU Level-1-260C-UNLIM 0 to 70 1431C & no Sb/Br) TL1431CDRG4 ACTIVE SOIC D 8 2500 Green (RoHS NIPDAU Level-1-260C-UNLIM 0 to 70 1431C & no Sb/Br) TL1431CLP ACTIVE TO-92 LP 3 1000 Pb-Free SN N / A for Pkg Type 0 to 70 TL1431C (RoHS) TL1431CLPE3 ACTIVE TO-92 LP 3 1000 Pb-Free SN N / A for Pkg Type 0 to 70 TL1431C (RoHS) TL1431CLPME3 ACTIVE TO-92 LP 3 2000 Pb-Free SN N / A for Pkg Type 0 to 70 TL1431C (RoHS) TL1431CLPR ACTIVE TO-92 LP 3 2000 Pb-Free SN N / A for Pkg Type 0 to 70 TL1431C (RoHS) TL1431CLPRE3 ACTIVE TO-92 LP 3 2000 Pb-Free SN N / A for Pkg Type 0 to 70 TL1431C (RoHS) TL1431CPWR ACTIVE TSSOP PW 8 2000 Green (RoHS NIPDAU | SN Level-1-260C-UNLIM 0 to 70 T1431 & no Sb/Br) TL1431CPWRG4 ACTIVE TSSOP PW 8 2000 Green (RoHS NIPDAU Level-1-260C-UNLIM 0 to 70 T1431 & no Sb/Br) TL1431MFK ACTIVE LCCC FK 20 1 TBD POST-PLATE N / A for Pkg Type -55 to 125 TL1431MFK TL1431MFKB ACTIVE LCCC FK 20 1 TBD POST-PLATE N / A for Pkg Type -55 to 125 5962- 9962001Q2A Addendum-Page 1

PACKAGE OPTION ADDENDUM www.ti.com 6-Feb-2020 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) TL1431MFKB TL1431MJG ACTIVE CDIP JG 8 1 TBD Call TI N / A for Pkg Type -55 to 125 TL1431MJG TL1431MJGB ACTIVE CDIP JG 8 1 TBD Call TI N / A for Pkg Type -55 to 125 9962001QPA TL1431M TL1431QD ACTIVE SOIC D 8 75 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 125 1431Q & no Sb/Br) TL1431QDG4 ACTIVE SOIC D 8 75 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 125 1431Q & no Sb/Br) TL1431QDR ACTIVE SOIC D 8 2500 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 125 1431Q & no Sb/Br) TL1431QDRG4 ACTIVE SOIC D 8 2500 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 125 1431Q & no Sb/Br) TL1431QPWRG4 ACTIVE TSSOP PW 8 2000 Green (RoHS NIPDAU Level-1-260C-UNLIM -40 to 125 1431Q & 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 2

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. OTHER QUALIFIED VERSIONS OF TL1431, TL1431M : •Catalog: TL1431 •Automotive: TL1431-Q1, TL1431-Q1 •Enhanced Product: TL1431-EP, TL1431-EP •Military: TL1431M •Space: TL1431-SP, TL1431-SP NOTE: Qualified Version Definitions: •Catalog - TI's standard catalog product •Automotive - Q100 devices qualified for high-reliability automotive applications targeting zero defects •Enhanced Product - Supports Defense, Aerospace and Medical Applications •Military - QML certified for Military and Defense Applications •Space - Radiation tolerant, ceramic packaging and qualified for use in Space-based application Addendum-Page 3

PACKAGE MATERIALS INFORMATION www.ti.com 5-Jul-2019 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) TL1431CDR SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 TL1431CPWR TSSOP PW 8 2000 330.0 12.4 7.0 3.6 1.6 8.0 12.0 Q1 TL1431CPWRG4 TSSOP PW 8 2000 330.0 12.4 7.0 3.6 1.6 8.0 12.0 Q1 TL1431QDR SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 TL1431QDRG4 SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 TL1431QPWRG4 TSSOP PW 8 2000 330.0 12.4 7.0 3.6 1.6 8.0 12.0 Q1 PackMaterials-Page1

PACKAGE MATERIALS INFORMATION www.ti.com 5-Jul-2019 *Alldimensionsarenominal Device PackageType PackageDrawing Pins SPQ Length(mm) Width(mm) Height(mm) TL1431CDR SOIC D 8 2500 340.5 338.1 20.6 TL1431CPWR TSSOP PW 8 2000 367.0 367.0 35.0 TL1431CPWRG4 TSSOP PW 8 2000 367.0 367.0 35.0 TL1431QDR SOIC D 8 2500 340.5 338.1 20.6 TL1431QDRG4 SOIC D 8 2500 350.0 350.0 43.0 TL1431QPWRG4 TSSOP PW 8 2000 367.0 367.0 35.0 PackMaterials-Page2

PACKAGE OUTLINE D0008A SOIC - 1.75 mm max height SCALE 2.800 SMALL OUTLINE INTEGRATED CIRCUIT C SEATING PLANE .228-.244 TYP [5.80-6.19] .004 [0.1] C A PIN 1 ID AREA 6X .050 [1.27] 8 1 2X .189-.197 [4.81-5.00] .150 NOTE 3 [3.81] 4X (0 -15 ) 4 5 8X .012-.020 B .150-.157 [0.31-0.51] .069 MAX [3.81-3.98] .010 [0.25] C A B [1.75] NOTE 4 .005-.010 TYP [0.13-0.25] 4X (0 -15 ) SEE DETAIL A .010 [0.25] .004-.010 0 - 8 [0.11-0.25] .016-.050 [0.41-1.27] DETAIL A (.041) TYPICAL [1.04] 4214825/C 02/2019 NOTES: 1. Linear dimensions are in inches [millimeters]. Dimensions in parenthesis are for reference only. Controlling dimensions are in inches. 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 .006 [0.15] per side. 4. This dimension does not include interlead flash. 5. Reference JEDEC registration MS-012, variation AA. www.ti.com

EXAMPLE BOARD LAYOUT D0008A SOIC - 1.75 mm max height SMALL OUTLINE INTEGRATED CIRCUIT 8X (.061 ) [1.55] SYMM SEE DETAILS 1 8 8X (.024) [0.6] SYMM (R.002 ) TYP [0.05] 5 4 6X (.050 ) [1.27] (.213) [5.4] LAND PATTERN EXAMPLE EXPOSED METAL SHOWN SCALE:8X SOLDER MASK SOLDER MASK METAL OPENING OPENING METAL UNDER SOLDER MASK EXPOSED METAL EXPOSED METAL .0028 MAX .0028 MIN [0.07] [0.07] ALL AROUND ALL AROUND NON SOLDER MASK SOLDER MASK DEFINED DEFINED SOLDER MASK DETAILS 4214825/C 02/2019 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. www.ti.com

EXAMPLE STENCIL DESIGN D0008A SOIC - 1.75 mm max height SMALL OUTLINE INTEGRATED CIRCUIT 8X (.061 ) [1.55] SYMM 1 8 8X (.024) [0.6] SYMM (R.002 ) TYP [0.05] 5 4 6X (.050 ) [1.27] (.213) [5.4] SOLDER PASTE EXAMPLE BASED ON .005 INCH [0.125 MM] THICK STENCIL SCALE:8X 4214825/C 02/2019 NOTES: (continued) 8. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate design recommendations. 9. Board assembly site may have different recommendations for stencil design. www.ti.com

MECHANICAL DATA MCER001A – JANUARY 1995 – REVISED JANUARY 1997 JG (R-GDIP-T8) CERAMIC DUAL-IN-LINE 0.400 (10,16) 0.355 (9,00) 8 5 0.280 (7,11) 0.245 (6,22) 1 4 0.065 (1,65) 0.045 (1,14) 0.063 (1,60) 0.020 (0,51) MIN 0.310 (7,87) 0.015 (0,38) 0.290 (7,37) 0.200 (5,08) MAX Seating Plane 0.130 (3,30) MIN 0.023 (0,58) 0°–15° 0.015 (0,38) 0.100 (2,54) 0.014 (0,36) 0.008 (0,20) 4040107/C 08/96 NOTES: A. All linear dimensions are in inches (millimeters). B. This drawing is subject to change without notice. C. This package can be hermetically sealed with a ceramic lid using glass frit. D. Index point is provided on cap for terminal identification. E. Falls within MIL STD 1835 GDIP1-T8 • POST OFFICE BOX 655303 DALLAS, TEXAS 75265

PACKAGE OUTLINE PW0008A TSSOP - 1.2 mm max height SCALE 2.800 SMALL OUTLINE PACKAGE C 6.6 TYP SEATING PLANE 6.2 PIN 1 ID A 0.1 C AREA 6X 0.65 8 1 3.1 2X 2.9 NOTE 3 1.95 4 5 0.30 8X 0.19 4.5 1.2 MAX B 0.1 C A B 4.3 NOTE 4 (0.15) TYP SEE DETAIL A 0.25 GAGE PLANE 0.15 0.75 0 - 8 0.05 0.50 DETAIL A TYPICAL 4221848/A 02/2015 NOTES: 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 AA. www.ti.com

EXAMPLE BOARD LAYOUT PW0008A TSSOP - 1.2 mm max height SMALL OUTLINE PACKAGE 8X (1.5) 8X (0.45) SYMM (R0.05) 1 TYP 8 SYMM 6X (0.65) 5 4 (5.8) LAND PATTERN EXAMPLE SCALE:10X SOOPLEDNEINRG MASK METAL MSOELTDAEL RU NMDAESRK SOOPLEDNEINRG MASK 0.05 MAX 0.05 MIN ALL AROUND ALL AROUND NON SOLDER MASK SOLDER MASK DEFINED DEFINED SOLDER MASK DETAILS NOT TO SCALE 4221848/A 02/2015 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. www.ti.com

EXAMPLE STENCIL DESIGN PW0008A TSSOP - 1.2 mm max height SMALL OUTLINE PACKAGE 8X (1.5) SYMM (R0.05) TYP 8X (0.45) 1 8 SYMM 6X (0.65) 5 4 (5.8) SOLDER PASTE EXAMPLE BASED ON 0.125 mm THICK STENCIL SCALE:10X 4221848/A 02/2015 NOTES: (continued) 8. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate design recommendations. 9. Board assembly site may have different recommendations for stencil design. www.ti.com

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PACKAGE OUTLINE LP0003A TO-92 - 5.34 mm max height SCALE 1.200 SCALE 1.200 TO-92 5.21 4.44 EJECTOR PIN OPTIONAL 5.34 4.32 (1.5) TYP (2.54) SEATING 2X NOTE 3 PLANE 4 MAX (0.51) TYP 6X 0.076 MAX SEATING PLANE 3X 12.7 MIN 0.43 2X 0.55 3X 3X 0.35 2.6 0.2 0.38 2X 1.27 0.13 FORMED LEAD OPTION OTHER DIMENSIONS IDENTICAL STRAIGHT LEAD OPTION TO STRAIGHT LEAD OPTION 2.67 3X 2.03 4.19 3.17 3 2 1 3.43 MIN 4215214/B 04/2017 NOTES: 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. Lead dimensions are not controlled within this area. 4. Reference JEDEC TO-226, variation AA. 5. Shipping method: a. Straight lead option available in bulk pack only. b. Formed lead option available in tape and reel or ammo pack. c. Specific products can be offered in limited combinations of shipping medium and lead options. d. Consult product folder for more information on available options. www.ti.com

EXAMPLE BOARD LAYOUT LP0003A TO-92 - 5.34 mm max height TO-92 FULL R TYP 0.05 MAX (1.07) ALL AROUND METAL 3X ( 0.85) HOLE TYP TYP 2X METAL (1.5) 2X (1.5) 2X SOLDER MASK OPENING 1 2 3 (R0.05) TYP 2X (1.07) (1.27) SOLDER MASK (2.54) OPENING LAND PATTERN EXAMPLE STRAIGHT LEAD OPTION NON-SOLDER MASK DEFINED SCALE:15X 0.05 MAX ( 1.4) 2X ( 1.4) ALL AROUND METAL TYP 3X ( 0.9) HOLE METAL 2X (R0.05) TYP 1 2 3 SOLDER MASK OPENING (2.6) SOLDER MASK OPENING (5.2) LAND PATTERN EXAMPLE FORMED LEAD OPTION NON-SOLDER MASK DEFINED SCALE:15X 4215214/B 04/2017 www.ti.com

TAPE SPECIFICATIONS LP0003A TO-92 - 5.34 mm max height TO-92 13.7 11.7 32 23 (2.5) TYP 0.5 MIN 16.5 15.5 11.0 9.75 8.5 8.50 19.0 17.5 2.9 6.75 3.7-4.3 TYP TYP 2.4 5.95 13.0 12.4 FOR FORMED LEAD OPTION PACKAGE 4215214/B 04/2017 www.ti.com

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