SLVS984B –SEPTEMBER 2009–REVISED MARCH …

1 PowerSupplyVINVOUTCLONOCGNDONOFFRLOADCLO ADVDDCINP roductFolderSample &BuyTechnicalDocumentsTools &SoftwareSupport &CommunityTPS22946 SLVS984B SEPTEMBER2009 REVISEDMARCH2015 TPS22946 UltralowPower,Low Input Voltage,Current-LimitedLoad SwitchWith Shutoff,Auto-Restart,and OvercurrentConditionTime-OutWhenthe switchcurrentreachesthe maximumlimit,1 Featuresthe TPS22946operatesin a constant-currentmodeto1 UltralowQuiescentCurrent1 A (Typical) VIN= VThe currentlimit can be selectedusingthe CL input: to Va high CL inputsets the currentlimit to 155 mA, a lowCL inputsetsthe currentlimitto 70 mA,anda Low ON-ResistancefloatingCL inputsets the currentlimit to 30 mA. rON= 300 m at VIN= VIf the constantcurrentconditionpersistsafter10 ms, rON= 400 m at VIN= Vthe switchis turnedoff and the fault signalpin (OC)is rON= 500 m at VIN= Vpulledlow.

2 The TPS22946has an auto-restartfeature rON= 600 m at VIN= Vwhichturnsthe switchon againafter70 ms if the ONpin is still the TPS22946remainsin an over- SelectableMinimumCurrentLimit:currentcon ditionfor 5 seconds,the deviceshutsoff155 mA, 70 mA, or 30 mAuntilit is turnedon againby settingthe ON control IntegratedInrushCurrentTime-out(8 ms)signaloff and thenon. ShutdownCurrent:< 1 AIf the deviceis usedto protectan LDO,the inrush ThermalShutdowncurrentrequiredby the LDOat startupcan,in some FaultBlankingcases,exceedthe currentlimit and initiatea blanking(currentlimiting) AutoRestartallowancefor this scenarioduringstartupof the LDO OvercurrentConditionTime-out(Automaticby temporarilyincreasingthe currentlimit to 435 mADisablefor PermanentOvercurrent)for 8 ms afterthe load switchis enabled.

3 Availablein space-saving6-pin ESDP erformanceTestedPer JESD22 DSBGA(YZP) deviceis characterized 6000-VHuman-BodyModelfor operationoverthe free-airtemperaturerangeof 40 C to 85 C.(A114-B,ClassII) Tiny mm mm (YZP)DeviceInformation(1)PARTNUMBERPACKA GEBODYSIZE(NOM)2 ApplicationsTPS22946 DSBGA(6) FingerprintModuleProtection(1) For all availablepackages,see the orderableaddendumat PortableConsumerElectronicsthe end of the datasheet. MobilePhonesTypicalApplicationSchematic Smartphones Notebooks GPSD evices3 DescriptionThe TPS22946is an ultralowpowerloadswitchthatprovidesprote ctionto systemsandloadsin 300-m current-limitedP-channelMOSFET that can operateoveran inputvoltagerangeof to V. Theswitchis controlledby an on/offinput(ON),whichcaninterfacedirectl ywith the devicewhena continuousover-currentconditioncausesexc essiveheatingbyturningoff the IMPORTANTNOTICEat the end of this datasheetaddressesavailability,warranty, changes,use in safety-criticalapplications,intellectual propertymattersand SEPTEMBER2009 Applicationand Pin Configurationand Deviceand Mechanical,Packaging,and Orderable8 RevisionHistoryChangesfromRevisionA (February2010)

4 To RevisionBPage AddedPinConfigurationandFunctionssection ,ESDR atingstable,FeatureDescriptionsection,De viceFunctionalModes,ApplicationandImplem entationsection,PowerSupplyRecommendatio nssection,Layoutsection,DeviceandDocumen tationSupportsection,andMechanical,Packa ging, 2009 2015,TexasInstrumentsIncorporatedProduct FolderLinks:TPS22946 Bump View12 BCAL aser Marking SEPTEMBER2009 REVISEDMARCH20155 Pin Configurationand Functions6-PinDSBGAYZPP ackagePin AssignmentsCONOCBCLGNDAVINVOUT21 Pin the the powerswitchand the supplyvoltagefor the deviceB1 GND GroundCurrentlimit high is 155-mAcurrentlimit,CL low is 70-mAcurrentlimit,and CL Active-lowopen-drainoutputthat indicatesan overcurrent,supplyundervoltage,C1 OCOor 2009 2015,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback3 ProductFolderLinks.

5 TPS22946 TPS22946 SLVS984B SEPTEMBER2009 (unlessotherwisenoted)MINMAXUNITVII nputvoltageVIN, VOUT, ON, CL 40125 CTstgStoragetemperature 65150 (HBM),per JEDEC specificationJESD22(A114-B, 6000 ClassII)(1)V(ESD)ElectrostaticdischargeV Charged-devicemodel(CDM),per JEDEC specificationJESD22- 2000C101(2)(1)JEDEC documentJEP155statesthat 500-VHBM allowssafe manufacturingwith a standardESDcontrolprocess.(2)JEDEC documentJEP157statesthat 250-VCDM allowssafe manufacturingwith a (unlessotherwisenoted) pin pin voltage0 VINVVOUTOUTpin voltage0 VINVTAA mbientfree-airtemperature 4085 CtCLSETCL pin settingtime8msCINI nputcapacitor1(1) FVIN= high-levelinputvoltageVVIN= low-levelinputvoltageVVIN= low-levelinputvoltageVIN= to V, IIH= 55 VINVINVVILCL high-levelinputvoltageVIN= to V, IIL= 55 VINV(1) (1)YZP(DSBGA)UNIT6 PINSR JAJunction-to-ambientthermalresistance13 1R JC(top)Junction-to-case(top) C/W (1)For moreinformationabouttraditionaland new thermalmetrics,see theICPackageThermalMetricsapplicationrep ort, 2009 2015, SEPTEMBER2009 to V, TYPvaluesat TA= 25 C (unlessotherwisenoted)PARAMETERTESTCONDI TIONSTA(1)

6 MINTYPMAXUNITIOUT= 0 mA, VIN= V to VFull 0 mA, VIN= V to AIOUT= 0 mA, VIN= to (OFF)OFFstatesupplycurrentVON= 0 VVIN= V, VOUT openFull AVIN= V,IOUT(LEAKAGE)OFFstateswitchcurrentVON= 0 VFull AVOUT shortto GND25 VFull VFull 100 mAVIN= V Full VFull range1 IONON inputleakagecurrentVON= VINor GNDFull range1 AVIN= V, VOUT= V, CL = GNDFull range7085120 VIN= V, VOUT= V, CL = GNDFull range6080115 VIN= V, VOUT= V, CL = VINFull range155175235 ILIMC urrentlimitmAVIN= V, VOUT= V, CL = VINFull range135165230 VIN= V, VOUT= V, CL floatingFull range304560 VIN= V, VOUT= V, CL floatingFull range284060 Ilimit_inrushInrushcurrentlimitRl= 1 , VIN= V, VOUT= VFull range375435685mAShutdownthreshold135 Thermalshutdown(2)

7 ReturnfromshutdownFull range125 CHysteresis10 VIN= 5 V, ISINK= 10 outputlogiclow voltageFull rangeVVIN= V, ISINK= 10 outputhigh leakagecurrentVIN= 5 V, SwitchONFull range1 A(1)Full rangeTA= 40 C to 85 C(2) 2009 2015,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback5 ProductFolderLinks:TPS22946 TPS22946 SLVS984B SEPTEMBER2009 V, RL= 50 , CL = 1 F, TA= 40 C to 85 C, TYPvaluesat TA= 25 C (unlessotherwisenoted)PARAMETERTESTCONDI TIONSMINTYPMAXUNITtPWRONP ower-ontimeRL= 50 , CL= 1 F192 stPWROFFP ower-offtimeRL= 50 , CL= 1 stONTurnontimeRL= 50 , CL= 1 F125 stOFFT urnofftimeRL= 50 , CL= 1 F115 stRVOUT rise timeRL= 50 , CL= 1 F35 stFVOUT fall timeRL= 50 , CL= 1 F120 stBLANKO vercurrentblankingtime71015mstRSTARTAuto -restarttime507095mstTIMEOUTO vercurrentdetectiontime-out(1)VIN= VON= V, hardshort(2) VON= V, (3)tMODOC msmaximumresponsetimeVIN= VON= V, Moderateovercurrentcondition(3) VON= V, hardshort(2)270tHARDSHORHard-shortdetect ionmaximum sTresponsetimeVIN= VON= V, hardshort(2)295(1)

8 SeeAutomaticDisableinCaseofPermanentOver current.(2)Hardshortcheckis performedat the outputvoltageof the activewhenVOUT< 2/3 VIN.(3)If the currentgoingthroughthe switchis aboveILIM, thenthe moderateover-currentconditionis activated6 SubmitDocumentationFeedbackCopyright 2009 2015,TexasInstrumentsIncorporatedProduct FolderLinks:TPS2294602040608010012014016 0180200-50-250255075100 Temperature ( C)ILIM(mA)CL = HighCL = LowCL = ( C)IIN(Off) (nA)VIN= VVIN= VVIN= ( C)IIN(Leakage) (nA)VIN= VVIN= VVIN= ( C)IIN(Quiescent) ( A)VIN= VVIN= VVIN= ( C)ON Resistance (Ohm)VIN= VVIN= VVIN= Resistance (Ohm)TA= 85 CTA= 25 CTA= -40 SEPTEMBER2009 ON-Resistancevs InputVoltageFigure2. ON-ResistanceVs TemperatureFigure3. InputCurrent(Quiescent)vs TemperatureFigure4.

9 InputCurrent(Leakage)vs TemperatureFigure5. InputCurrent(Off)vs TemperatureFigure6. CurrentLimitvs TemperatureCopyright 2009 2015,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback7 ( C)tPWROFF( s) (V)VOUT(V)VIN= VVIN= VVIN= VVIN= VVIN= V6668707274767880-50-250255075100 Temperature ( C)tRestart(ms)VIN= VVIN= VVIN= V050100150200250-402585 Temperature ( C)tPWRON( s)0204060801001201401601802000123456 VIN(V)ILIM(mA)CL = HighCL = LowCL = ( C)tBlank(ms)VIN= VVIN= VVIN= VTPS22946 SLVS984B SEPTEMBER2009 (continued)Figure7. CurrentLimitvs InputVoltageFigure8. tBlankvs TemperatureFigure10. tPWRONvs TemperatureFigure9. tResetvs TemperatureFigure11. tPWROFFvs TemperatureFigure12. ON Threshold8 SubmitDocumentationFeedbackCopyright 2009 2015,TexasInstrumentsIncorporatedProduct FolderLinks:TPS22946 VONIOUTVOUTV = VC = 10 FC= 1 FININOUTVINIOUTVOUTI nput and enable pins tied togetherVshorted to GNDV = V = VC = 10 FC= 1 FR = 2 OUTINONINOUTLWV(see Note)DRVVOUTIOUTVOCNOTE: Vsignal forces the device to go into over-current (see Note)DRVVOUTIOUTVOCNOTE: Vsignal forces the device to go into over-current = VC = 1 FC= FR = 500 mININOUTLWIOUTVONV = VC = 1 FC= FR = 500 SEPTEMBER2009 REVISEDMARCH2015 TypicalCharacteristics(continued)Figure1 3.

10 TONResponseFigure14. tOFFR esponseFigure16. tRestartResponseFigure15. tBlankResponseFigure17. HardShort-CircuitResponseFigure18. Short-CircuitResponseCopyright 2009 2015,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback9 ProductFolderLinks:TPS22946 VONIOUTVOUTV = V = VC = 10 FC= 1 FR = 5 INONINOUTLWVINTPS22946 SLVS984B SEPTEMBER2009 (continued)Figure19. ModerateOvercurrentResponse10 SubmitDocumentationFeedbackCopyright 2009 2015,TexasInstrumentsIncorporatedProduct FolderLinks:TPS22946tPWRONtPWROFFVIN0 VVOUTVONVIN/2 VIN/2 VOUT/2 VOUT/2 VIN0 VVOLVOHON(A)OFFTPS22946 GNDGNDGNDRLCLVOUTVINCIN=1 F + 90%90%VOUT trtf10%10%V/2 OUTVOUTV/2 OUTV/2 ONV/2 ONVONVON0 V0 VVOHVOLtONtOFFTEST CIRCUITt/tWAVEFORMSON SEPTEMBER2009 REVISEDMARCH20157 ParameterMeasurementInformationFigure20.