TPS82671EVM-646

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User's Guide SLVU383D –October2010–RevisedNovember 2011 TPS826xxEVM Thisuser’s guidedescribesthecharacteristics,operation,and use oftheTPS826xxEVM-646 evaluation module (EVM). The TPS826xxEVM-646 is a fullyassembled and testedplatformforevaluatingthe performance of the TPS82671 , TPS82672 , TPS82675 , TPS82690 and TPS82695 high-frequency, synchronous,step-down dc-dc convertersoptimizedfor battery-poweredportableapplications.This document includesschematicdiagrams,a printedcircuitboard (PCB) layout,billof materials,and test data.Throughoutthisdocument, the abbreviationsEVM and TPS826xxEVM and the term evaluation module aresynonymous withtheTPS826xxEVM-646 unlessotherwisenoted.

1 Introduction

The TPS82671, TPS82672, TPS82675, TPS82690 and TPS82695 devicesareseriesofhigh-frequency, synchronous,step-downdc-dcconvertersoptimizedforbattery-poweredportableapplications.Intended forlow-powerapplications,theTPS8267x supportup to600-mA loadcurrentand theTPS8269 supportup to500-mA and allallowtheuse oflow-costchipinductorsand capacitors.Witha wideinputvoltagerange of2.3V to4.8V,thedevicessupportapplicationspowered by lithium-ion(Li-Ion)batterieswithextended voltageranges.DifferentfixedvoltageoutputversionsoftheTPS826xx areavailable.These converters operateata regulated5.5-MHz (TPS8267x)and 4-MHz (TPS8269x)switchingfrequencyand entera power-savemode operationunderlightloadcurrentsinordertomaintainhighefficiencyovertheentire loadcurrentrange.A PFM mode extendsthebatterylifeby reducingthequiescentcurrentto17 µA (typ) duringlightloadoperation.

1.1 Features

Inputvoltagerange:2.3V up to4.8V
Fixedoutputvoltages
Up to600-mA outputcurrent(TPS8267x)
Up to500-mA outputcurrent(TPS8269x)
5.5-MHz regulatedfrequencyoperation(TPS8267x)
4-MHz regulatedfrequencyoperation(TPS8269x)
Outputcapacitordischarge(optional)
Totalsolutionsize:< 6.7mm 2

1.2 Applications

Cellphones,smartphones
WLAN, GPS, and Bluetooth® applications
DTV tuners
Point-of-Load(PoL)applications

1.3 EVM OrderingOptions

Table1 providestheorderinginformationforthevariousEVM options. Table1.OrderingInformation Maximum Output OrderableEVM Number Device PartNumber Output Voltage Current TPS82671EVM-646 TPS82671 1.8V 600 mA TPS82672EVM-646 TPS82672 1.5V 600 mA TPS82675EVM-646 TPS82675 1.2V 600 mA TPS82690EVM-646 TPS82690 2.8V 500 mA TPS82695EVM-646 TPS82695 2.5V 500 mA

2 TPS826xxEVM SLVU383D –October2010–RevisedNovember 2011

www.ti.com TPS826xxEVM Schematic

2 TPS826xxEVM Schematic

Figure1 illustratestheTPS826xxEVM-646 schematic. NOTE: Forreferenceonly;see Table2 forspecificvalues. Figure1.TPS826xxEVM Schematic

3 Connector and TestPointDescriptions

3.1 Input/Output Connectors:TPS826xxEVM

3.1.1 J1 VIN

Thisheaderisthepositiveconnectiontotheinputpower supply.The power supplymust be connected between J1 and J3 (GND).The leadstotheinputsupplyshouldbe twistedand keptas shortas possible. The inputvoltagemust be between 2.3V and 4.8V.

3.1.2 J2 S+/S–

J2 S+/S– arethesense connectionfortheinputoftheconverter.Connecta voltmeter,sense connection ofa power supply,oroscilloscopetothisheader.

3.1.3 J3 GND

Thisheaderisthereturnconnectiontotheinputpower supply.Connectthepower supplybetween J3 and J1 (VIN).The leadstotheinputsupplyshouldbe twistedand keptas shortas possible.The inputvoltage must be between 2.3V and 4.8V. CapacitorC3 compensatesforparasiticinductanceas a resultofthewiresfromthedc power supplyto theEVM. Itisnotrequiredinan actualapplicationcircuit. 3SLVU383D –October2010–RevisedNovember 2011 TPS826xxEVM SubmitDocumentationFeedback Copyright© 2010–2011,Texas InstrumentsIncorporated

Connectorand TestPointDescriptions www.ti.com

3.1.4 J4 VOUT

Thisheaderisthepositiveoutputofthestep-downconverter.The outputvoltageofthedevicesinthe TPS826xx familieshave fixedoutputvoltages;refertothespecificdevicedatasheetfordetailed informationon thedeviceoutputvoltage.

3.1.5 J5 S+/S–

J5 S+/S– arethesense connectionfortheoutputoftheconverter.Connecta voltmeter,sense connection ofan electronicload,oroscilloscopetothisheader.

3.1.6 J6 GND

J6 isthereturnconnectionoftheconverter.A loadcan be connectedbetween J6 and J4 (VOUT).

3.2 Jumpers and Switches

3.2.1 JP1 ENABLE

Thisjumperenables/disablestheconverteron theEVM. Placinga shortingbarbetween ENABLE and ON turnson theconverter.Placinga shortingbarbetween ENABLE and OFF disablestheconverter.

3.2.2 JP2 MODE

Thisjumperenables/disablesthepower-savingmode underlightloads.Placinga shortingbarbetween MODE and PWM disablesthepower-savingmode. Ifthepower-savemode isdisabled,theconverter operatesinforcedPWM mode overtheentireloadcurrentrange. Placinga shortingbarbetween MODE and PSM enablesthepower-savingmode. The deviceoperatesin power-savingmode underlightloadconditions.See thespecificdevicedatasheetfordetailedinformation.

4 TPS826xxEVM SLVU383D –October2010–RevisedNovember 2011

/c45 S/c45TPS826xxEVM-646DC Power Supply Load Oscilloscope /c45 www.ti.com TestConfiguration

4 TestConfiguration

4.1 Hardware Setup

Figure2 illustratesa typicalhardwaretestconfiguration. Figure2.Hardware Board Connection

4.2 Procedure

Followtheseprocedureswhen configuringtheEVM fortesting. CAUTION Many ofthecomponents on theTPS826xxEVM-646 aresusceptibletodamage by electrostaticdischarge(ESD). Customers are advisedto observe proper ESD handlingprecautionswhen unpackingand handlingthe EVM, including the use of a grounded wriststrap,bootstraps,or mats at an approved ESD workstation.An electrostaticsmock and safetyglassesshouldalsobe worn. 1. Work atan ESD workstation.Make surethatany wriststraps,bootstraps,ormats areconnectedand referencetheusertoearthgroundbeforepower isappliedtotheEVM. Electrostaticsmocks and safetyglassesshouldalsobe worn. 2. Connecta dc power supplybetween J1 and J2 on theTPS826xxEVM. Note thattheinputvoltage shouldrangefrom2.3V to4.8V.Keep thewiresfromtheinputpower supplytoEVM as shortas possibleand twisted. 3. Connecta dc voltmeteroroscilloscopetotheoutputsense connectionoftheEVM. 4. A loadcan be connectedbetween J4 and J6 on theTPS826xxEVM. 5. To enabletheconverter,connecttheshortingbaron JP1 between ENABLE and ON on the TPS826xxEVM. 6. The TPS826xxEVM has a featurethatallowsuserstoswitchbetween Power-Save Mode underlight loadsand forcedPWM mode, withjumperJP2. 5SLVU383D –October2010–RevisedNovember 2011 TPS826xxEVM SubmitDocumentationFeedback Copyright© 2010–2011,Texas InstrumentsIncorporated

TPS826xxEVM TestData www.ti.com

5 TPS826xxEVM TestData

ThissectionpresentstypicalperformancedatafortheTPS826xxEVM. Actualperformancedatacan be affectedby measurement techniquesand environmentalvariables;therefore,theseresultsarepresented forreferenceand may differfromactualresultsobtainedby some users.

5.1 Thermal Performance

Figure3 and Figure4 show thetypicalthermalperformancefortheTPS826xx forboththetopsideand thebottomside,respectively.

5.1.1 Top Side

Figure3.Top Side Thermal Measurement

6 TPS826xxEVM SLVU383D –October2010–RevisedNovember 2011

www.ti.com TPS826xxEVM TestData

5.1.2 Bottom Side

TPS826xxEVM Assembly Drawingsand Layout www.ti.com

6 TPS826xxEVM Assembly Drawings and Layout

Figure5 throughFigure7 show thedesignoftheshow thedesignoftheTPS826xxEVM-646 printed circuitboards.The EVM has been designedusinga two-layer,1-ouncecopper-cladPCB withall components inan activeareaon thetopsideoftheboard.Moving components tobothsidesofthePCB orusingadditionalinternallayerscan offeradditionalsizereductionforspace-constrainedsystems. NOTE: Board layoutsarenottoscale.These figuresareintendedtoshow how theboardislaidout; theyarenotintendedtobe used formanufacturingTPS826xxEVM-646 PCBs. Note theconnectionoftheTPS8267x feedback(FB)pin.Itisrecommended toconnectthe FB pindirectlytotheinductor,notdirectlyon theVOUT connectionoftheoutputcapacitor.The connectiontotheinductorisrecommended because itprovidesbettertransientresponse performance. Figure5.TPS826xxEVM Component Placement (Top View)

8 TPS826xxEVM SLVU383D –October2010–RevisedNovember 2011

www.ti.com TPS826xxEVM Assembly Drawingsand Layout Figure6.TPS826xxEVM Top-SideCopper (Top View) 9SLVU383D –October2010–RevisedNovember 2011 TPS826xxEVM SubmitDocumentationFeedback Copyright© 2010–2011,Texas InstrumentsIncorporated

TPS826xxEVM Assembly Drawingsand Layout www.ti.com Figure7.TPS826xxEVM Bottom-SideCopper (Bottom View)

10 TPS826xxEVM SLVU383D –October2010–RevisedNovember 2011

www.ti.com BillofMaterials

7 BillofMaterials

Table2 liststhebillofmaterialsfortheTPS826xxEVM. Table2.TPS826xxEVM-646 BillofMaterials EVM Device Option:Count -001 -002 -003 -004 -005 RefDes Value Description Size PartNumber Mfr 0 0 0 0 0 C1, C2 Open Capacitor,Ceramic 0603 Std Std Capacitor,Tantalum,6.3V,70 m Ω,1 1 1 1 1 C3 150 µF 3528(B) T520B157M006ATE070 Kemet20% Connector,SMA ,Straight,PC0 0 0 0 0 J7 Open 901-144-8RFX AMP0.210in2 mount IC,600-mA, High-FreqµModule1 0 0 0 0 U1 TPS82671SIP SIP-8 TPS82671SIP TIStep-Down Converter IC,600-mA, High-FreqµModule0 1 0 0 0 U1 TPS82675SIP SIP-8 TPS82675SIP TIStep-Down Converter IC,500-mA, High-FreqµModule0 0 1 0 0 U1 TPS82690SIP SIP-8 TPS82690SIP TIStep-Down Converter IC,500-mA, High-FreqµModule0 0 0 1 0 U1 TPS82695SIP SIP-8 TPS82695SIP TIStep-Down Converter IC,600-mA, High-FreqµModule0 0 0 0 1 U1 TPS82672SIP SIP-8 TPS82672SIP TIStep-Down Converter

8 Marking Information

Table3 providesthemarkinginformationforthisEVM. Table3.Marking Information Assembly Number Marking Text HPA646-001 TPS82671EVM-646 HPA646-002 TPS82675EVM-646 HPA646-003 TPS82690EVM-646 HPA646-004 TPS82695EVM-646 HPA646-005 TPS82672EVM-646 RevisionHistory NOTE: Page numbers forpreviousrevisionsmay differfrompage numbers inthecurrentversion. 11SLVU383D –October2010–RevisedNovember 2011 RevisionHistory SubmitDocumentationFeedback Copyright© 2010–2011,Texas InstrumentsIncorporated

EvaluationBoard/KitImportantNotice Texas Instruments(TI)providestheenclosedproduct(s)underthefollowingconditions: Thisevaluationboard/kitisintendedforuse forENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and isnotconsideredby TItobe a finishedend-productfitforgeneralconsumer use.Personshandlingthe product(s)must have electronicstrainingand observegood engineeringpracticestandards.As such,thegoods beingprovidedare notintendedtobe completeintermsofrequireddesign-,marketing-,and/ormanufacturing-relatedprotectiveconsiderations, includingproductsafetyand environmentalmeasures typicallyfoundinend productsthatincorporatesuch semiconductor components orcircuitboards.Thisevaluationboard/kitdoes notfallwithinthescope oftheEuropean Uniondirectivesregarding electromagneticcompatibility,restrictedsubstances(RoHS),recycling(WEEE), FCC, CE orUL, and thereforemay notmeet the technicalrequirementsofthesedirectivesorotherrelateddirectives. Shouldthisevaluationboard/kitnotmeet thespecificationsindicatedintheUser’s Guide,theboard/kitmay be returnedwithin30 days fromthedateofdeliveryfora fullrefund.THE FOREGOING WARRANTY ISTHE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER AND ISIN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED,OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. The userassumes allresponsibilityand liabilityforproperand safehandlingofthegoods.Further,theuserindemnifiesTIfromall claimsarisingfromthehandlingoruse ofthegoods.Due totheopen constructionoftheproduct,itistheuser’s responsibilityto takeany and allappropriateprecautionswithregardtoelectrostaticdischarge. EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. TIcurrentlydealswitha varietyofcustomersforproducts,and thereforeourarrangementwiththeuserisnot exclusive. TIassumes no liabilityforapplicationsassistance,customer productdesign,softwareperformance,or infringementof patentsor servicesdescribedherein. PleasereadtheUser’s Guide and,specifically,theWarningsand RestrictionsnoticeintheUser’s Guide priortohandlingthe product.Thisnoticecontainsimportantsafetyinformationabouttemperaturesand voltages.Foradditionalinformationon TI’s environmentaland/orsafetyprograms,pleasecontacttheTIapplicationengineerorvisitwww.ti.com/esh. No licenseisgrantedunderany patentrightorotherintellectualpropertyrightofTIcoveringorrelatingtoany machine,process,or combinationinwhichsuch TIproductsorservicesmightbe orareused. FCC Warning Thisevaluationboard/kitisintendedforuse forENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and isnotconsideredby TItobe a finishedend-productfitforgeneralconsumer use.Itgenerates,uses,and can radiateradiofrequencyenergyand has notbeen testedforcompliancewiththelimitsofcomputingdevicespursuanttopart15 ofFCC rules,whicharedesignedtoprovidereasonableprotectionagainstradiofrequencyinterference.Operationofthis equipmentinotherenvironmentsmay cause interferencewithradiocommunications,inwhichcase theuserathisown expense willbe requiredtotakewhatevermeasures may be requiredtocorrectthisinterference. EVM Warnings and Restrictions Exceedingthespecifiedinputrangemay cause unexpectedoperationand/orirreversibledamage totheEVM. Ifthereare questionsconcerningtheinputrange,pleasecontacta TIfieldrepresentativepriortoconnectingtheinputpower. Applyingloadsoutsideofthespecifiedoutputrangemay resultinunintendedoperationand/orpossiblepermanentdamage tothe EVM. PleaseconsulttheEVM User's Guide priortoconnectingany loadtotheEVM output.Ifthereisuncertaintyas totheload specification,pleasecontacta TIfieldrepresentative. Duringnormaloperation,some circuitcomponents may have case temperaturesgreaterthan+60°C. The EVM isdesignedto operateproperlywithcertaincomponents above +60°C as longas theinputand outputrangesaremaintained.These components includebutarenotlimitedtolinearregulators,switchingtransistors,pass transistors,and currentsense resistors.These typesof devicescan be identifiedusingtheEVM schematiclocatedintheEVM User's Guide.When placingmeasurement probesnear thesedevicesduringoperation,pleasebe aware thatthesedevicesmay be verywarm tothetouch. MailingAddress:Texas Instruments,PostOfficeBox 655303,Dallas,Texas 75265 Copyright© 2011,Texas InstrumentsIncorporated

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Product Information

TPS82671EVM-646 specifications and overview.

Summary

TPS826xxEVM

Description