High Current Single Inductor Buck-Boost Converter ...

1 Output Current (mA)Efficiency (%)TPS63025, Power Save EnabledVIN= , VOUT= , VOUT= , VOUT= , VOUT= V up to 2A1 H10 V VVINAP roductFolderSample &BuyTechnicalDocumentsTools &SoftwareSupport &CommunityTPS630250 TPS630251,TPS630252 SLVSBJ9B MAY2014 REVISEDMARCH2015 TPS63025xHigh Current , high EfficiencySingleInductorBuck-BoostConver ter1 Features3 DescriptionTheTPS63025xare highefficiency,low quiescent1 RealBuckor BoostOperationwith Automaticandcurrentbuck-boostconverterss uitablefor applicationSeamlessTransitionBetweenBuck and Boostwherethe inputvoltageis higheror go as highas 2 A in V to V inputvoltagerangeboostmodeand as highas 4 A in the switchesis limitedto 2 A ContinuousOutputCurrent: VIN V,a typicalvalueof 4 A.

2 The TPS63025xregulatestheVOUT= Voutputvoltageoverthe completeinputvoltagerange Adjustableand FixedOutputVoltageby automaticallyswitchingbetweenbuckor boost Efficiencyup to 95%in Buckor BoostModeandmodedependingon the inputvoltageensuringaup to 97%whenVIN= buck -boostconverteris basedon a fixedfrequency,pulse-width- (PWM)controllerusingsynchronous 35- A OperatingQuiescentCurrentrectificationto low load IntegratedSoft Startcurrents,the converterentersPowerSaveModeto PowerSaveModemaintainhighefficiencyovert he a PFM/PWMpin that allows TrueShutdownFunctionthe userto choosebetweenautomaticPFM/PWM OutputCapacitorDischargeFunctionmodeoper ationand Over-TemperatureProtectionand Over-CurrentPWMmodea fixed-frequencyof outputvoltageis programmableusinganexternalresistordivid er,or is fixedinternallyon the disabledto minimize x , , mm x 3 mm,14-pinHot a 20-pinWCSP packagemeasuring2 x mm x 3mm.

3 CellularPhones,SmartPhones TabletsPCDeviceInformation(1) PC and SmartPhoneaccessoriesPARTNUMBERPACKAGEBO DYSIZE(NOM) Pointof load regulationDSBGA(20) BatteryPoweredApplicationsVQFN(14)(2) mm x 3 mm(1) For all availablepackages,see the orderableaddendumatthe end of the datasheet.(2) ProductPreview4 TypicalApplicationspEfficiencyvs OutputCurrent1An IMPORTANTNOTICEat the end of this datasheetaddressesavailability,warranty, changes,use in safety-criticalapplications,intellectual propertymattersand ,this ,TPS630252 SLVSBJ9B MAY2014 Applicationand Pin Configurationand Deviceand Mechanical,Packaging,and RevisionHistoryNOTE:Pagenumbersfor previousrevisionsmay differfrompagenumbersin the (May2014)to RevisionBPage AddedVQFN(RNC) ChangedUVLOin theElectricalCharacteristicsFrom:MAX= V To: 2 V.

4 5 ChangesfromOriginal(May2014)to RevisionAPage AddeddevicesTPS630250,TPS630251,and AddedSpecifications,DetailedDescriptions ection,Applicationand Implementationsection,PowerSupplyRecomme ndationssection,Layoutsection,Deviceand DocumentationSupportsection;and, ChangedLoadRegulationTyp specfrom"125 mV/A" to " mV/A" ..62 SubmitDocumentationFeedbackCopyright 2014 2015,TexasInstrumentsIncorporatedProduct FolderLinks:TPS630251 TPS630252131214123456789 1011A2A4A1A3B1B4B2B3C3C4C1C2D3D2D4D1E3E2 E4E1 TPS630250 TPS630251, MAY2014 REVISEDMARCH20156 V7 Pin Configurationand FunctionsVQFN14-PinDSBGA20-PinRNCP ackageYFF PackageTop ViewTop ViewProductPreviewPin FunctionsPINI/ODESCRIPTIONNAMEDSBGARNCVO UTA1,A2,A312, 13, 14 PWRBuck-BoostconverteroutputFBA411 INVoltagefeedbackof adjustableversion,mustbe connectedto VOUTon fixedoutputvoltageversionsL2B1,B2,B31 PWRC onnectionfor InductorPFM/PWMB410 INset low for PFMmode,set high for mustnot be left floatingPGNDC1,C2,C32 PWRP owerGroundGNDC49 PWRA nalogGroundL1D1,D2.

5 D33 PWRC onnectionfor high to enableand low to mustnot be left ,E2,E34, 5, 6 PWRS upplyvoltagefor powerstageVINAE47 PWRS upplyvoltagefor 2014 2015,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback3 ProductFolderLinks:TPS630251 TPS630252 TPS630250 TPS630251,TPS630252 SLVSBJ9B MAY2014 (1)overjunctiontemperaturerange(unlessot herwisenoted)VALUEMINMAXUNITV oltage(2)VIN,L1, EN, VINA,PFM/PWM ,FB (3) (4) L1(5) 40125 CTstgStoragetemperaturerange 65150(1)StressesbeyondthoselistedunderAb soluteMaximumRatingsmay causepermanentdamageto the stressratingsonly,whichdo not implyfunctionaloperationof the deviceat theseor any otherconditionsbeyondthoseindicatedunder RecommendedOperatingConditions.

6 Exposureto absolute-maximum-ratedconditionsfor extendedperiodsmay affectdevicereliability.(2)All voltagevaluesare with respectto networkgroundpin.(3)DC voltagerating.(4)AC voltagerating.(5) ,underthoseconditiondo not exceed105 C for morethan25% (HBM),per ANSI/ESDA/JEDECJS-001(1) 2000V(ESD)ElectrostaticdischargeVCharged -devicemodel(CDM),per JEDEC specificationJESD22- 700C101(2)(1)JEDEC documentJEP155statesthat 500-VHBM allowssafe manufacturingwith a standardESDcontrolprocess.(2)JEDEC documentJEP157statesthat 250-VCDM allowssafe manufacturingwith a (1) (2) HCoutOutputCapacitance(3)20 FTAO peratingambienttemperature 4085 CTJO peratingvirtualjunctiontemperature 40125 C(1)Referto the ApplicationInformationsectionfor furtherinformation(2)Effectiveinductance valueat nominalvaluegivenmatchesa typicalinductorto be chosento meettheinductancerequired.

7 (3)Due to the dc bias effectof ceramiccapacitors,the effectivecapacitanceis lowerthenthe nominalvaluewhena voltageis why the capacitanceis specifiedto allowthe selectionof the nominalcapacitorrequiredwith the dc bias effectfor this type nominalvaluegivenmatchesa typicalcapacitorto be chosento meetthe 2014 2015,TexasInstrumentsIncorporatedProduct FolderLinks:TPS630251 TPS630252 TPS630250 TPS630251, MAY2014 (1)YFF (DSBGA)RNC(VQFN)(2)UNIT20 PINS14 PINSR JC(top)Junction-to-case(top) C/W JC(bot)Junction-to-case(bottom)thermalre sistanceN/AN/A(1)For moreinformationabouttraditionaland new thermalmetrics,see theIC PackageThermalMetricsapplicationreport,S PRA953.

8 (2) ,TJ= 40 C to 125 C, typicalvaluesare at TA= 25 C (unlessotherwisenoted) turn on into full loadIOUT= (1)VIN>= ,VOUT= 0mA,EN = VIN= ,3570 AIQQ uiescentcurrentVOUT= -40 C to 85 C,VOUT12 Anot switchingIsdShutdowncurrentEN = low, TJ= -40 C to 85 CThermalShutdownhysteresis20 CLOGICSIGNALSEN, PFM/PWMVIHH ighlevelinputvoltageVIN= levelinputvoltageVIN= = GNDor ,TPS630250-1%1%VFBF eedbackvoltageaccuracy(2)PFMmode,TPS6302 50-1% +3%VOUTO utputvoltageaccuracyPWMmode, (2)PFMmode, , (2)PFMmode, enterPFMmodeVIN= 3V; VOUT= currentVFB= FET on-resistanceVIN= ,VOUT= RDS_Buck(on)Low side FET on-resistanceVIN= ,VOUT= Highside FET on-resistanceVIN= ,VOUT= RDS_Boost(on)Low side FET on-resistanceVIN= ,VOUT= (1)For minimumoutputcurrentin a specificworkingpointsee Figure5 and Equation1 troughEquation4.

9 (2)Conditions:L = 1 H, COUT= 2 22 2014 2015,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback5 ProductFolderLinks:TPS630251 TPS630252 Input Voltage (V)Resistance (m ) -40 C= 85 CTA= 25 CTATATPS630252 Input Voltage (V)Quiescent Current (mA) -40 C= 85 CTA= 25 CTATATPS630250 TPS630251,TPS630252 SLVSBJ9B MAY2014 (continued)VIN= ,TJ= 40 C to 125 C, typicalvaluesare at TA= 25 C (unlessotherwisenoted)PARAMETERTESTCONDI TIONSMINTYPMAXUNITVIN= ,VOUT= (3) C to 125 = low120 mV/Line regulationVIN= ,IOUT= ,IOUT= 0A to 2A5A(3)For variationof this parameterwith Inputvoltageand temperaturesee V to V, TJ= 40 C to 125 C, typicalvaluesare at TA= 25 C (unlessotherwisenoted)

10 PARAMETERTESTCONDITIONSMINTYPMAXUNITOUTP UTVOUT=EN=lowto high ,BuckmodeVIN= ,VOUT= ,450 sIOUT=2 AtSSSoft-starttimeVOUT=EN=lowto high ,BoostmodeVIN= ,VOUT= ,700 sIOUT=2 ATimefromwhenEN=hightotdStartup delay100 HighSideFET On-Resistancevs InputVoltageFigure2. QuiescentCurrentvs InputVoltage6 SubmitDocumentationFeedbackCopyright 2014 2015,TexasInstrumentsIncorporatedProduct FolderLinks:TPS630251 TPS630252_+PGNDPGNDVINVOUT+-VREFPGNDPGND FBVOUTL2L1 VINVINAPFM/PWMENGNDC urrentSensorGateControlModulatorOscillat orDeviceControlTemperatureControl_+PGNDE NTPS630250 TPS630251, MAY2014 REVISEDMARCH20159 TPS63025xuse 4 internalN-channelMOSFETsto maintainsynchronouspowerconversionat all deviceto keephighefficiencyoverthe completeinputvoltageand regulatethe outputvoltageat all possibleinputvoltageconditions,the deviceautomaticallyswitchesfrombuckopera tionto boostoperationand backas requiredby the alwaysusesoneactiveswitch,one rectifyingswitch,one switchis heldon, and one switchheldoff.