Using the TPS2500/1 EVM User's Guide LiteratureNumber:SLUU363 June2009

User's Guide SLUU363–June2009 TPS2500/1, Power-Distribution Switch With Low Voltage Input EVM This user’s guide describes the TPS2500/1DRCEVM evaluation modules (EVM). This guide contains the EVMschematic,billofmaterials,assemblydrawing,andtopandbottomboardlayouts. 1 Introduction TheTPS2500/1DRCEVMisanevaluationmodule(EVM)forTexasInstruments’familyof power-distributionswitcheswithadjustablecurrent-limit.TheseEVMsoperateovera1.8-Vto5.25-V rangeproviding5-VoutputforUSBdevices.Anonboardjumpersetstheoutputcurrent-limittoeither0.5 Aor1A.Testpointsprovideconvenientaccesstoallcriticalnodevoltages. ThesilkscreenoutlineonthePCBtop-sideenclosescomponentsfoundinatypicalUSBapplication. TheTPS2500/1isinanSONpackagewithathermalpad.Theseswitcheshaveanenableinput,an overcurrentstatusoutput,andovertemperatureshutdown. 1.1 Related Documentation from Texas Instruments TPS2500/1datasheet(TILiteratureNumberSLVS886) 2 Electrical Specifications TheEVMmeetstheelectricalspecificationsinTable1overtherecommendedoperating junction-temperaturerangeof-40(cid:176) C£ T £ 125(cid:176) CfortheDRV(SON)package. J Table1.EVMElectricalSpecifications PARAMETER CONDITION MIN TYP MAX UNIT Inputvoltage,V J1 1.8 – 6.5 V IN J2shorting-jumperisabsent,J3isshort 0.600 0.652 0.710 Short-circuitoutput circuited,TPS2500/1isenabled A current-limit,ILIMIT J2shorting-jumperispresent,J3isshort 1.215 1.283 1.362 circuited,TPS2500/1isenabled 2.1 Electrostatic Discharge TheEVMhasbeentestedtoIEC61000-4-2.Thelevelusedwas8-kVcontactdischargeand15-kVair discharge.SurgeswereappliedtotheEVMinputandoutput.NodamagetotheTPS2500/1was observed. 2 TPS2500/1,Power-DistributionSwitch SLUU363–June2009 WithLowVoltageInputEVM SubmitDocumentationFeedback

www.ti.com Schematic 3 Schematic 3.1 EVM Options Table2.EVMOptions HPA337 DEVICE DEVICEPACKAGE ECOMODE -1 TPS2500DRC SON Enabled -2 TPS2501DRC SON Disabled 3.2 Schematic Figure1.EVMSchematic SLUU363–June2009 TPS2500/1,Power-DistributionSwitch 3 SubmitDocumentationFeedback WithLowVoltageInputEVM

EVMSetup www.ti.com 4 EVM Setup 4.1 Recommended Test Equipment Thefollowingtestequipmentisrecommended: • Two-channelstorageoscilloscope • Currentprobe • Voltageprobe • Anadjustablepowersupplywitha1.75-Vto6.5-Voutputanda10-Aoutputcurrent-limit • Volt-ohmmeter • Apassiveoractiveloadcapableofhandling3A. 4.2 Measuring the Short-Circuit Output Current-Limit TheusershouldreadtheTPS2500/1datasheetbeforeusingtheEVM. Figure2showstheEVMtestsetupformeasuringcurrent-limit.SwitchS1enablesthepower-distribution switchintoashortcircuitforthismeasurement.Figure3showsthecurrentwaveformfortheTPS2500/1 EVMwithashortingjumperpopulatingheaderJ3;Figure4showsthecurrentwaveformwithheaderJ3 unpopulated. Oscilloscope Voltage Probe FAULT Current Probe + + IN EVM OUT 0-W 5V,5A - - 7"Twisted Pair, #20AWG Figure2.EVMSetupForMeasuringCurrent-Limit 4 TPS2500/1,Power-DistributionSwitch SLUU363–June2009 WithLowVoltageInputEVM SubmitDocumentationFeedback

www.ti.com EVMSetup Figure3.TPS2500EVMShort-CircuitOutput Figure4.TPS2500EVMShort-CircuitOutput Currentand Currentand FAULTStatusWithJ3ShortingJumper FAULTStatusWithJ3ShortingJumper Present. Absent. 4.3 Adjusting the Short-Circuit Output Current-Limit TheEVMprovidestwocurrent-limitsettings.Ifadifferentsettingisrequired,thenpopulateheaderJ3with ashortingjumperandmodifyresistorR3usingthecurrentlimitresistorcalculator,TILiteratureNumber SLVC163. SeetheTPS2500/1datasheetfortheworst-casecurrent-limitvariation. SLUU363–June2009 TPS2500/1,Power-DistributionSwitch 5 SubmitDocumentationFeedback WithLowVoltageInputEVM

BoardLayout www.ti.com 5 Board Layout Figure5.EVMTopAssembly 6 TPS2500/1,Power-DistributionSwitch SLUU363–June2009 WithLowVoltageInputEVM SubmitDocumentationFeedback

www.ti.com BoardLayout Figure6.EVMTop-SideLayout SLUU363–June2009 TPS2500/1,Power-DistributionSwitch 7 SubmitDocumentationFeedback WithLowVoltageInputEVM

BoardLayout www.ti.com Figure7.EVMBottomAssembly 8 TPS2500/1,Power-DistributionSwitch SLUU363–June2009 WithLowVoltageInputEVM SubmitDocumentationFeedback

www.ti.com BoardLayout Figure8.EVMBottom-SideLayout SLUU363–June2009 TPS2500/1,Power-DistributionSwitch 9 SubmitDocumentationFeedback WithLowVoltageInputEVM

ListofMaterials www.ti.com 6 List of Materials Table3.TPS2500/1ListofMaterials(1)(2)(3)(4) TPS2501 TPS2500 REFDES DESCRIPTION PARTNUMBER MFR 1 1 C1 Capacitor,ceramic,10V,X5R,10%,10m F,0805 C2012X5R1A10 TDK 6K 2 2 C2,C5 Capacitor,ceramic,16V,X7R,10%,0.1m F,0805 STD STD 1 1 C3 Capacitor,aluminum,SM,20%,6.3V,100m F,DCode EEVFK0J101P Panasonic 1 1 C4 Capacitor,ceramic,10V,X5R,10%,22m F,1210 C3225X5R1A22 TDK 6M Capacitor,tantalum,150m F,10V,100mW ,10%,150m F, B45197A2157K 1 1 C6 KEMET 7343(D) 409 Capacitor,aluminum,6.3V,20%,470m F,0.328x0.390 1 1 C7 EEVFK0J471P Panasonic inch 3 3 J1,J5,J6 Terminalblock,2pin,6A,3.5mm,0.27x0.25inch ED1514 OST Header,male2pin,100-milspacing,(36-pinstrip),0.100 3 3 J2,J3,J4 PTC36SAAN Sullins inchx2 1 1 L1 Inductor,SMT,2.3A,70mW ,2.2m H,0.153x0.153inch LPS4018-222ML Coilcraft 0 0 L2 Inductor,SMT,4.2A,16.5mW ,2.2m H,0.300sq" DR73-2R2-R Coiltronics 3 3 R1,R4, Resistor,chip,1/16W,5%,10kW ,0603 CRCW0603- Vishay R5 103-J 2 2 R2,R3 Resistor,chip,1/16W,1%,20.0kW ,0603 CRCW0603- Vishay 2002-F 0 0 SH1 Groundsymbol TP1,TP2, 4 4 Testpoint,SM,0.150x0.090,5016,0.185x0.135inch 5016 Keystone TP3,TP4 TP5,TP6, TP7,TP8, TP9, Testpoint,white,thruholecolorkeyed,5002,0.100x 8 8 5002 Keystone TP10, 0.100inch TP11, TP12 0 1 U1 IntegratedUSBSwitchw/BoostConverter,DRC10 TPS2500DRC TI 1 0 U1 IntegratedUSBSwitchw/BoostConverter,DRC10 TPS2500DRC TI 1 1 -- PCB,2.3Inx2.7Inx0.062In HPA337 Any 3 3 -- Shunt,100mil,black,0.100 929950-00 3M (1) 1.TheseassembliesareESDsensitive,ESDprecautionsshallbeobserved. (2) 2.Theseassembliesmustbecleanandfreefromfluxandallcontaminants.Useofnocleanfluxisnotacceptable. (3) TheseassembliesmustcomplywithworkmanshipstandardsIPC-A-610Class2. (4) Refdesignatorsmarkedwithanasterisk('**')cannotbesubstituted.Allothercomponentscanbesubstitutedwithequivalent MFG'scomponents. 10 TPS2500/1,Power-DistributionSwitch SLUU363–June2009 WithLowVoltageInputEVM SubmitDocumentationFeedback

EVALUATIONBOARD/KITIMPORTANTNOTICE TexasInstruments(TI)providestheenclosedproduct(s)underthefollowingconditions: Thisevaluationboard/kitisintendedforuseforENGINEERINGDEVELOPMENT,DEMONSTRATION,OREVALUATIONPURPOSES ONLYandisnotconsideredbyTItobeafinishedend-productfitforgeneralconsumeruse.Personshandlingtheproduct(s)musthave electronicstrainingandobservegoodengineeringpracticestandards.Assuch,thegoodsbeingprovidedarenotintendedtobecomplete intermsofrequireddesign-,marketing-,and/ormanufacturing-relatedprotectiveconsiderations,includingproductsafetyandenvironmental measurestypicallyfoundinendproductsthatincorporatesuchsemiconductorcomponentsorcircuitboards.Thisevaluationboard/kitdoes notfallwithinthescopeoftheEuropeanUniondirectivesregardingelectromagneticcompatibility,restrictedsubstances(RoHS),recycling (WEEE),FCC,CEorUL,andthereforemaynotmeetthetechnicalrequirementsofthesedirectivesorotherrelateddirectives. Shouldthisevaluationboard/kitnotmeetthespecificationsindicatedintheUser’sGuide,theboard/kitmaybereturnedwithin30daysfrom thedateofdeliveryforafullrefund.THEFOREGOINGWARRANTYISTHEEXCLUSIVEWARRANTYMADEBYSELLERTOBUYER ANDISINLIEUOFALLOTHERWARRANTIES,EXPRESSED,IMPLIED,ORSTATUTORY,INCLUDINGANYWARRANTYOF MERCHANTABILITYORFITNESSFORANYPARTICULARPURPOSE. Theuserassumesallresponsibilityandliabilityforproperandsafehandlingofthegoods.Further,theuserindemnifiesTIfromallclaims arisingfromthehandlingoruseofthegoods.Duetotheopenconstructionoftheproduct,itistheuser’sresponsibilitytotakeanyandall appropriateprecautionswithregardtoelectrostaticdischarge. EXCEPTTOTHEEXTENTOFTHEINDEMNITYSETFORTHABOVE,NEITHERPARTYSHALLBELIABLETOTHEOTHERFORANY INDIRECT,SPECIAL,INCIDENTAL,ORCONSEQUENTIALDAMAGES. TIcurrentlydealswithavarietyofcustomersforproducts,andthereforeourarrangementwiththeuserisnotexclusive. TIassumesnoliabilityforapplicationsassistance,customerproductdesign,softwareperformance,orinfringementofpatentsor servicesdescribedherein. PleasereadtheUser’sGuideand,specifically,theWarningsandRestrictionsnoticeintheUser’sGuidepriortohandlingtheproduct.This noticecontainsimportantsafetyinformationabouttemperaturesandvoltages.ForadditionalinformationonTI’senvironmentaland/or safetyprograms,pleasecontacttheTIapplicationengineerorvisitwww.ti.com/esh. NolicenseisgrantedunderanypatentrightorotherintellectualpropertyrightofTIcoveringorrelatingtoanymachine,process,or combinationinwhichsuchTIproductsorservicesmightbeorareused. FCCWarning Thisevaluationboard/kitisintendedforuseforENGINEERINGDEVELOPMENT,DEMONSTRATION,OREVALUATIONPURPOSES ONLYandisnotconsideredbyTItobeafinishedend-productfitforgeneralconsumeruse.Itgenerates,uses,andcanradiateradio frequencyenergyandhasnotbeentestedforcompliancewiththelimitsofcomputingdevicespursuanttopart15ofFCCrules,whichare designedtoprovidereasonableprotectionagainstradiofrequencyinterference.Operationofthisequipmentinotherenvironmentsmay causeinterferencewithradiocommunications,inwhichcasetheuserathisownexpensewillberequiredtotakewhatevermeasuresmay berequiredtocorrectthisinterference. EVMWARNINGSANDRESTRICTIONS ItisimportanttooperatethisEVMwithintheinputvoltagerangeof1.8Vto5.5Vandtheoutputvoltagerangeof1.8Vto5.5V. Exceedingthespecifiedinputrangemaycauseunexpectedoperationand/orirreversibledamagetotheEVM.Iftherearequestions concerningtheinputrange,pleasecontactaTIfieldrepresentativepriortoconnectingtheinputpower. Applyingloadsoutsideofthespecifiedoutputrangemayresultinunintendedoperationand/orpossiblepermanentdamagetotheEVM. PleaseconsulttheEVMUser'sGuidepriortoconnectinganyloadtotheEVMoutput.Ifthereisuncertaintyastotheloadspecification, pleasecontactaTIfieldrepresentative. Duringnormaloperation,somecircuitcomponentsmayhavecasetemperaturesgreaterthan85(cid:176) C.TheEVMisdesignedtooperate properlywithcertaincomponentsabove85(cid:176) Caslongastheinputandoutputrangesaremaintained.Thesecomponentsincludebutare notlimitedtolinearregulators,switchingtransistors,passtransistors,andcurrentsenseresistors.Thesetypesofdevicescanbeidentified usingtheEVMschematiclocatedintheEVMUser'sGuide.Whenplacingmeasurementprobesnearthesedevicesduringoperation, pleasebeawarethatthesedevicesmaybeverywarmtothetouch. MailingAddress:TexasInstruments,PostOfficeBox655303,Dallas,Texas75265 Copyright©2008,TexasInstrumentsIncorporated

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