SLVS984B –SEPTEMBER 2009–REVISED MARCH 2015 …

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. 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.

2 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. 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.

3 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)to RevisionBPage AddedPinConfigurationandFunctionssection ,ESDR atingstable,FeatureDescriptionsection,De viceFunctionalModes,ApplicationandImplem entationsection,PowerSupplyRecommendatio nssection,Layoutsection,DeviceandDocumen tationSupportsection,andMechanical,Packa ging, 2009 2015,TexasInstrumentsIncorporatedProduct FolderLinks.

4 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: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)MINTYPMAXUNITIOUT= 0 mA, VIN= V to VFull 0 mA, VIN= V to AIOUT= 0 mA, VIN= to (OFF)

5 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)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)SeeAutomaticDisableinC aseofPermanentOvercurrent.

6 (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. 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.

7 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. 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.

8 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. TestCircuitand tON/tOFFW aveformsFigure21. tPWRON/tPWROFFW aveformsCopyright 2009 2015,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback11 ProductFolderLinks:TPS22946 VINCLONA2B2C2 GNDB1 OCC1 VOUTA1 Hard-ShortDetectionCurrentLimitOscillato rControlLogicThermalShutdownTPS22946 SLVS984B SEPTEMBER2009 TPS22946is an ultralowpowerload switchthat providesprotectionto systemsand loadsin devicecontainsa 300-m current-limitedP-channelMOSFET that can operateoveran inputvoltagerangeof to V.

9 The switchis controlledby an on/offinput(ON),whichis capableofinterfacingdirectlywith TPS22946includesthermalshutdownprotectio nthatpreventsdamageto the devicewhena continuousover-currentconditioncausesexc essiveheatingbyturningoff the switchcurrentreachesthe maximumlimit,the TPS22946operatesin a currentlimit can be selectedusingthe CL input:ahighCL inputsets the currentlimit to 155 mA, a low CL inputsets the currentlimit to 70 mA, and a floatingCL inputsets the currentlimit to 30 the constantcurrentconditionstill persistsafter10 ms, the switchis turnedoff and the fault signalpin (OC)is pulledlow. The TPS22946has an auto-restartfeaturewhichturnsthe switchon againafter70 ms if theON pin is still the TPS22946remainsin an over-currentconditionfor 5 seconds,the deviceshutsoff until it is turnedon againby settingthe ON controlsignaloff and the deviceis usedto protectan LDO,the inrushcurrentrequiredby the LDOat startupcan,in somecases,exceedthe currentlimitand initiatea blanking(currentlimiting) TPS22946deviceprovidesallowancefor this scenarioduringstartupof the LDOby temporarilyincreasingthe currentlimit to435 mA for 8 ms afterthe load switchis TPS22946is availablein a space-saving6-pinDSBGA(YZP) deviceis characterizedforoperationoverthe free-airtemperaturerangeof 40 C to 85 FeatureListAUTO-rON(TYP) VCURRENTTIME-OUTBLANKINGTIMETIME-OUTTIME 30 mA, 70 mA, orTPS22946300 m Yes10 ms70 ms6 sActivehigh155 2009 2015,TexasInstrumentsIncorporatedProduct FolderLinks.

10 TPS22946 VOUTV is tied directly to VONINtPWRONV /2 INV /2 OUTVIN0 VVON0 VTemperature ( C)Normal Temperature140 C129 COver msOFFONOver temperature detectedduring the ON cycleOver Temperatureresumes the normal cycleOFF8mSInrush current windowtOVRTMPtOVRTMPSWITCHOPENSWITCHOPEN SWITCHCLOSESWITCHCLOSELoad Switch SEPTEMBER2009 thermalshutdowndetectioncircuitis activeevery8 ms for a periodof ms. The thermalshutdownprotectsthe part frominternallyor over-temperatureconditionthe switchis turned-off(Open).The switchautomaticallyturns-on(closes)again if temperatureof thedie dropsbelowthe thresholdtemperaturewhilethe part is still addition,if an overcurrentfaultconditionis detecteddue to a moderateovercurrentor a hard-short,thethermalshutdownis activatedimmediatelyand stayson continuouslyfor the durationof blanking(seeFigure32).NOTE:Casewherethe temperaturecausesthe overtemperaturedetectioncircuitto trip beforethe OvertemperatureDetectionCopyright 2009 2015,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback13 ProductFolderLinks:TPS22946 VOUTIOUTHard ShortDetectionA hard short occurs onVoutV is tied directly to VONINC urrent increasesthrough switchproportional to VOUTtPWRONV /2 INV /2 OUTVIN0 VVON0 VOver current due to hardshortCurrent islimitedNo is offOver short detected during the ON cycletBLANKtRSTARTtRSTARTtBLANKtBLANKtRS TARTI nrush Current window8 mstHARDSHORTtTIMEOUTSWITCHOPENSWITCHCLOS ESWITCHOPENSWITCHOPENSWITCHCLOSELoad Switch StatusTPS22946 SLVS984B SEPTEMBER2009 (continued) hard-shortdetectioncircuitis activeevery250 s for a periodof 125 s.