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tps3808g33

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简介:本文档为《tps3808g33pdf》,可适用于IT/计算机领域

wwwticomFEATURESDESCRIPTIONAPPLICATIONSTypicalApplicationCircuitVVTPSGTPSGDSPSENSEVDDVDDSENSEVIOVCOREGPIOGNDGNDGNDRESETMRCTCTRESETDBVPACKAGESOT(TOPVIEW)VDDSENSECTRESETGNDMRRESETGNDMRVDDSENSECTDRVPACKAGEmmxmmQFN(TOPVIEW)PowerPADTPSSBVSE–MAY–REVISEDOCTOBERLowQuiescentCurrent,ProgrammableDelaySupervisoryCircuit•PowerOnResetGeneratorwithAdjustableDelayTime:mstosTheTPSxxxfamilyofmicroprocessorsupervisorycircuitsmonitorsystemvoltagesfrom•VeryLowQuiescentCurrent:µAtypVtoV,assertinganopendrainRESETsignal•HighThresholdAccuracy:typwhentheSENSEvoltagedropsbelowapreset•FixedThresholdVoltagesforStandardthresholdorwhenthemanualreset(MR)pindropstoVoltageRailsfromVtoVandAdjustablealogiclowTheRESEToutputremainslowfortheVoltageDowntoVAreAvailableuseradjustabledelaytimeaftertheSENSEvoltageandmanualreset(MR)returnabovetheirthresholds•ManualReset(MR)Input•OpenDrainRESETOutputTheTPSusesaprecisionreferencetoachievethresholdaccuracyforVIT≤VThereset•TemperatureRange:–°Cto°Cdelaytimecanbesettomsbydisconnectingthe•SmallSOTandmm×mmQFNPackagesCTpin,msbyconnectingtheCTpintoVDDusingaresistor,orcanbeuseradjustedbetweenmsandsbyconnectingtheCTpintoanexternal•DSPorMicrocontrollerApplicationscapacitorTheTPShasaverylowtypicalquiescentcurrentofµAsoitiswellsuitedto•NotebookDesktopComputersbatterypoweredapplicationsItisavailableinasmall•PDAsHandHeldProductsSOTandanultrasmallmm×mmQFN•PortableBatteryPoweredProductsPowerPAD™packageandisfullyspecifiedovera•FPGAASICApplicationstemperaturerangeof–°Cto°C(TJ)Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheetPowerPADisatrademarkofTexasInstrumentsAlltrademarksarethepropertyoftheirrespectiveownersPRODUCTIONDATAinformationiscurrentasofpublicationdateCopyright©–,TexasInstrumentsIncorporatedProductsconformtospecificationsperthetermsoftheTexasInstrumentsstandardwarrantyProductionprocessingdoesnotnecessarilyincludetestingofallparameterswwwticomABSOLUTEMAXIMUMRATINGSTPSSBVSE–MAY–REVISEDOCTOBERThisintegratedcircuitcanbedamagedbyESDTexasInstrumentsrecommendsthatallintegratedcircuitsbehandledwithappropriateprecautionsFailuretoobserveproperhandlingandinstallationprocedurescancausedamageESDdamagecanrangefromsubtleperformancedegradationtocompletedevicefailurePrecisionintegratedcircuitsmaybemoresusceptibletodamagebecauseverysmallparametricchangescouldcausethedevicenottomeetitspublishedspecificationsORDERINGINFORMATION()PRODUCTNOMINALSUPPLYVOLTAGE()THRESHOLDVOLTAGE(VIT)TPSGAdjustableVTPSGVVTPSGVVTPSGVVTPSGVVTPSGVVTPSGVVTPSGVVTPSGVV()ForthemostcurrentpackageandorderinginformationseethePackageOptionAddendumattheendofthisdocument,orseetheTIwebsiteatwwwticom()CustomthresholdvoltagesfromVtoV,VtoVareavailablethroughtheuseoffactoryEEPROMprogrammingMinimumorderquantitiesapplyContactfactoryfordetailsandavailabilityoveroperatingjunctiontemperaturerange(unlessotherwisenoted)()TPSUNITInputvoltagerange,VDD–toVCTvoltagerange,VCT–toVDDVOthervoltageranges:VRESET,VMR,VSENSE–toVRESETpincurrentmAOperatingjunctiontemperaturerange,TJ()–to°CStoragetemperaturerange,TSTG–to°CESDrating,HBMkVESDrating,CDMV()StressesbeyondthoselistedunderabsolutemaximumratingsmaycausepermanentdamagetothedeviceThesearestressratingsonly,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedundertheElectricalCharacteristicsisnotimpliedExposuretoabsolutemaximumratedconditionsforextendedperiodsmayaffectdevicereliability()Duetothelowdissipatedpowerinthisdevice,itisassumedthatTJ=TAwwwticomELECTRICALCHARACTERISTICSTPSSBVSE–MAY–REVISEDOCTOBERV≤VDD≤V,RLRESET=kΩ,CLRESET=pF,overoperatingtemperaturerange(TJ=–°Cto°C),unlessotherwisenotedTypicalvaluesareatTJ=°CPARAMETERTESTCONDITIONSMINTYPMAXUNITVDDInputsupplyrangeVVDD=V,RESETnotassertedµAMR,RESET,CTopenIDDSupplycurrent(currentintoVDDpin)VDD=V,RESETnotassertedµAMR,RESET,CTopenV≤VDD<V,IOL=mAVVOLLowleveloutputvoltageV≤VDD≤V,IOL=mAVPowerupresetvoltage()VOL(max)=V,IRESET=µAVTPSG–±VIT≤V–±NegativegoingVITinputthresholdV<VIT≤V–±accuracyVIT≤V–°C<TJ<°C–±V<VIT≤V–°C<TJ<°C–±TPSGVHYSHysteresisonVITpinVITFixedversionsRMRMRInternalpullupresistancekΩTPSGVSENSE=VIT–nAInputcurrentatISENSESENSEpinFixedversionsVSENSE=VµAIOHRESETleakagecurrentVRESET=V,RESETnotassertednACTpinVIN=VtoVDDInputcapacitance,CINpFanypinOtherpinsVIN=VtoVVILMRlogiclowinputVDDVVIHMRlogichighinputVDDSENSEVIH=VIT,VIL=VITMaximumtransienttwµsdurationMRVIH=VDD,VIL=VDDCT=OpenmsCT=VDDmstdRESETdelaytimeSeetimingdiagramCT=pFmsCT=nFsPropagationdelayMRtoRESETVIH=VDD,VIL=VDDnstpHLHightolowlevelSENSEtoRESETVIH=VIT,VIL=VITµsRESETdelayθJAThermalresistance,junctiontoambient°CW()Thelowestsupplyvoltage(VDD)atwhichRESETbecomesactiveTrise(VDD)≥µsVwwwticomAdjustableVoltageVersionFixedVoltageVersionResetLogicTimer−kVDDVDDGNDVVREFSENSEMRCTRESETTPSGAdjustableVoltageResetLogicTimer−kVDDVDDGNDVVREFSENSEMRCTRESETRRRR=MΩPINASSIGNMENTSDBVPACKAGESOT(TOPVIEW)VDDSENSECTRESETGNDMRRESETGNDMRVDDSENSECTDRVPACKAGEmmxmmQFN(TOPVIEW)PowerPADTPSSBVSE–MAY–REVISEDOCTOBERFUNCTIONALBLOCKDIAGRAMSFigureAdjustableandFixedVoltageVersionsTERMINALFUNCTIONSTERMINALSOT(DBV)NAMEPINNODESCRIPTIONRESETRESETisanopendrainoutputthatisdriventoalowimpedancestatewhenRESETisasserted(eithertheSENSEinputislowerthanthethresholdvoltage(VIT)ortheMRpinissettoalogiclow)RESETwillremainlow(asserted)fortheresetperiodafterbothSENSEisaboveVITandMRissettoalogichighApullupresistorfromkΩtoMΩshouldbeusedonthispin,andallowstheresetpintoattainvoltageshigherthanVDDGNDGroundMRDrivingthemanualresetpin(MR)lowassertsRESETMRisinternallytiedtoVDDbyakΩpullupresistorCTResetperiodprogrammingpinConnectingthispintoVDDthroughakΩtokΩresistororleavingitopenresultsinfixeddelaytimes(seeElectricalCharacteristics)Connectingthispintoagroundreferencedcapacitor≥pFgivesauserprogrammabledelaytimeSeeSelectingTheResetDelayTimeintheDeviceOperationsectionformoreinformationSENSEThispinisconnectedtothevoltagetobemonitoredIfthevoltageatthisterminaldropsbelowthethresholdvoltageVIT,thenRESETisassertedVDDSupplyvoltageItisgoodanalogdesignpracticetoplaceaµFceramiccapacitorclosetothispinPowerPADPowerPADConnecttogroundplanetoenhancethermalperformanceofpackagewwwticomTimeVVVITVHYSVITVDDVDDMRSENSERESETVDDtDtDtDtD=ResetDelay=UndefinedStateTRUTHTABLETPSSBVSE–MAY–REVISEDOCTOBERTIMINGDIAGRAMFigureTPSTimingDiagramShowingMRandSENSEResetTimingMRSENSE>VITRESETLLLLHLHHwwwticomTYPICALCHARACTERISTICS−�C�C�C�CIDD(µA)VDD(V)CT(µF)−°C,°C,°CRESETTimeout(sec)Temperature(°C)−−−−−−−−NormalizedRESETTimeoutPeriod()Overdrive(VIT)TransientDurationbelowVIT(µs)RESETOCCURSABOVETHECURVETPSSBVSE–MAY–REVISEDOCTOBERAtTJ=°C,VDD=V,RLRESET=kΩ,andCLRESET=pF,unlessotherwisenotedSUPPLYCURRENTRESETTIMEOUTPERIODvsvsSUPPLYVOLTAGECTFigureFigureNORMALIZEDRESETTIMEOUTPERIODvsMAXIMUMTRANSIENTDURATIONATSENSETEMPERATUREvs(CT=OPEN,CT=VDD,CT=Any)SENSETHRESHOLDOVERDRIVEVOLTAGEFigureFigurewwwticomVOLLow−LevelRESETVoltage(V)VDD=VRESETCurrent(mA)Temperature(°C)−−−−−−−−NormalizedVIT()VOLLow−LevelRESETVoltage(V)RESETCurrent(mA)VDD=VVDD=VTPSSBVSE–MAY–REVISEDOCTOBERAtTJ=°C,VDD=V,RLRESET=kΩ,andCLRESET=pF,unlessotherwisenotedNORMALIZEDSENSETHRESHOLDVOLTAGE(VIT)LOWLEVELRESETVOLTAGEvsvsTEMPERATURERESETCURRENTFigureFigureLOWLEVELRESETVOLTAGEvsRESETCURRENTFigurewwwticomDEVICEOPERATIONSENSEINPUTRESETOUTPUTVINTPSGVDDSENSEGNDRESETRRnFVIT′=()RRVOUTMANUALRESET(MR)INPUTVTPSGOMAPVDDSENSEVDDSHV,,,,GNDGNDCTMRRESETMΩRESPWRONTPSSBVSE–MAY–REVISEDOCTOBERsupplylinecanbeusedtoallowtheresetsignalforTheTPSmicroprocessorsupervisoryproductthemicroprocessortohaveavoltagehigherthanVDDfamilyisdesignedtoassertaRESETsignalwhen(uptoV)ThepullupresistorshouldbenoeithertheSENSEpinvoltagedropsbelowVITorthesmallerthankΩasaresultofthefiniteimpedancemanualreset(MR)isdrivenlowTheRESEToutputoftheRESETlineremainsassertedforauseradjustabletimeafterboththemanualreset(MR)andSENSEvoltagesreturnabovetheirthresholdsAbroadrangeofvoltagethresholdandresetdelaytimeadjustmentsareTheSENSEinputprovidesaterminalatwhichanyavailable,allowingthesedevicestobeusedinawidesystemvoltagecanbemonitoredIfthevoltageonarrayofapplicationsResetthresholdvoltagescanbethispindropsbelowVIT,thenRESETisassertedfactorysetfromVtoVorfromVtoV,ThecomparatorhasabuiltinhysteresistoensurewhiletheTPSGcanbesettoanyvoltagesmoothRESETassertionsanddeassertionsItisaboveVusinganexternalresistordividerTwogoodanalogdesignpracticetoputanFtonFpresetdelaytimesarealsouserselectable:bypasscapacitorontheSENSEinputtoreduceconnectingtheCTpintoVDDresultsinamsresetsensitivitytotransientsandlayoutparasiticsdelay,whileleavingtheCTpinopenyieldsamsTheTPSGcanbeusedtomonitoranyresetdelayInaddition,connectingacapacitorvoltageraildowntoVusingthecircuitshowninbetweenCTandGNDallowsthedesignertoselectFigureanyresetdelayperiodfrommstosAtypicalapplicationoftheTPSGusedwiththeOMAPprocessorisshowninFigureTheopendrainRESEToutputistypicallyconnectedtotheRESETinputofamicroprocessorApullupresistormustbeusedtoholdthislinehighwhenRESETisnotassertedTheRESEToutputisundefinedforvoltagebelowV,butthisisnormallynotaproblemsincemostmicroprocessorsdonotfunctionbelowthisvoltageRESETremainshighFigureUsingtheTPSGtoMonitora(unasserted)aslongasSENSEisaboveitsthresholdUserDefinedThresholdVoltage(VIT)andthemanualreset(MR)islogichighIfeitherSENSEfallsbelowVITorMRisdrivenlow,RESETisasserted,drivingtheRESETpintoalowimpedanceThemanualreset(MR)inputallowsaprocessororotherlogiccircuitstoinitiatearesetAlogiclow(VDD)onMRcausesRESETtoassertAfterMRreturnstoalogichighandSENSEisaboveitsresetthreshold,RESETisdeassertedaftertheuserdefinedresetdelayexpiresNotethatMRisinternallytiedtoVDDusingakΩresistorsothispincanbeleftunconnectedifMRwillnotbeusedSeeFigureforhowMRcanbeusedtomonitormultiplesystemvoltagesNotethatifthelogicsignalFigureTypicalApplicationoftheTPSdrivingMRdoesnotgofullytoVDD,therewillbewithanOMAPProcessorsomeadditionalcurrentdrawintoVDDasaresultoftheinternalpullupresistoronMRTominimizeOnceMRisagainlogichighandSENSEisaboveVITcurrentdraw,alogiclevelFETcanbeusedasVHYS(thethresholdhysteresis),adelaycircuitisillustratedinFigureenabledwhichholdsRESETlowforaspecifiedresetdelayperiodOncetheresetdelayhasexpired,theRESETpingoestoahighimpedancestateThepullupresistorfromtheopendrainRESETtothewwwticomCT(nF)��tD(s)���(s)��()VVTPSGTPSGDSPSENSEVDDVDDSENSEVIOVCOREGPIOGNDGNDGNDRESETMRCTCTRESETIMMUNITYTOSENSEPINVOLTAGEVTPSxxxVDDSENSECTkΩGNDSELECTINGTHERESETDELAYTIMEDelay(s)=CT(nF)x−(s)msDelaymsDelay(c)(b)(a)VTPSGVDDSENSECTRESETVTPSGVDDSENSECTCTRESETVTPSGVDDSENSECTkΩRESETTPSSBVSE–MAY–REVISEDOCTOBERbythechoiceofresistorFigurebshowsafixedmsdelaytimebyleavingtheCTpinopenFigurecshowsagroundreferencedcapacitorconnectedtoCTforauserdefinedprogramtimebetweenmsandsThecapacitorCTshouldbe≥pFnominalvalueinorderfortheTPSxxxtorecognizethatthecapacitorispresentThecapacitorvalueforagivendelaytimecanbecalculatedusingthefollowingequation:TheresetdelaytimeisdeterminedbythetimeitFigureUsingMRtoMonitorMultipleSystemtakesanonchipprecisionnAcurrentsourcetoVoltageschargetheexternalcapacitortoVWhenaRESETisassertedthecapacitorisdischargedWhentheRESETconditionsarecleared,theinternalcurrentsourceisenabledandbeginstochargetheexternalcapacitorWhenthevoltageonthiscapacitorreachesV,RESETisdeassertedNotethatalowleakagetypecapacitorsuchasaceramicshouldbeused,andthatstraycapacitancearoundthispinmaycauseerrorsintheresetdelaytimeTRANSIENTSTheTPSisrelativelyimmunetoshortnegativeFigureUsinganExternalMOSFETtoMinimizetransientsontheSENSEpinSensitivitytotransientsIDDWhenMRSignalDoesNotGotoVDDisdependentonthresholdoverdrive,asshownintheMaximumTransientDurationatSensevsSenseThresholdOverdriveVoltagegraph(Figure)intheTypicalCharacteristicssectionTheTPShasthreeoptionsforsettingtheRESETdelaytimeasshowninFigureFigureashowstheconfigurationforafixedmstypicaldelaytimebytyingCTtoVDDaresistorfromkΩtokΩmustbeusedSupplycurrentisnotaffectedFigureConfigurationUsedtoSettheRESETDelayTimePACKAGINGINFORMATIONOrderableDeviceStatus()PackageTypePackageDrawingPinsPackageQtyEcoPlan()LeadBallFinishMSLPeakTemp()TPSGDBVRACTIVESOTDBVGreen(RoHSnoSbBr)CUNIPDAULevelCUNLIMTPSGDBVRGACTIVESOTDBVGreen(RoHSnoSbBr)CUNIPDAULevelCUNLIMTPSGDBVTACTIVESOTDBVGreen(RoHSnoSbBr)CUNIPDAULevelCUNLIMTPSGDBVTGACTIVESOTDBVGreen(RoHSnoSbBr)CUNIPDAULevelCUNLIMTPSGDBVRACTIVESOTDBVGreen(RoHSnoSbBr)CUNIPDAULevelCUNLIMTPSGDBVTACTIVESOTDBVGreen(RoHSnoSbBr)CUNIPDAULevelCUNLIMTPSGDBVTGACTIVESOTDBVGreen(RoHSnoSbBr)CUNIPDAULevelCUNLIMTPSGDBVRACTIVESOTDBVGreen(RoHSnoSbBr)CUNIPDAULevelCUNLIMTPSGDBVRGACTIVESOTDBVGreen(RoHSnoSbBr)CUNIPDAULevelCUNLIMTPSGDBVTACTIVESOTDBVGreen(RoHSnoSbBr)CUNIPDAULevelCUNLIMTPSGDBVTGACTIVESOTDBVGreen(RoHSnoSbBr)CUNIPDAULevelCUNLIMTPSGDRVRPREVIEWSONDRVTBDCallTICallTITPSGDRVTPREVIEWSONDRVTBDCallTICallTITPSGDBVRACTIVESOTDBVGreen(RoHSnoSbBr)CUNIPDAULevelCUNLIMTPSGDBVRGACTIVESOTDBVGreen(RoHSnoSbBr)CUNIPDAULevelCUNLIMTPSGDBVTACTIVESOTDBVGreen(RoHSnoSbBr)CUNIPDAULevelCUNLIMTPSGDBVTGACTIVESOTDBVGreen(RoHSnoSbBr)CUNIPDAULevelCUNLIMTPSGDBVRACTIVESOTDBVGreen(RoHSnoSbBr)CUNIPDAULevelCUNLIMTPSGDBVRGACTIVESOTDBVGreen(RoHSnoSbBr)CUNIPDAULevelCUNLIMTPSGDBVTACTIVESOTDBVGreen(RoHSnoSbBr)CUNIPDAULevelCUNLIMTPSGDBVTGACTIVESOTDBVGreen(RoHSnoSbBr)CUNIPDAULevelCUNLIMTPSGDBVRACTIVESOTDBVGreen(RoHSnoSbBr)CUNIPDAULevelCUNLIMTPSGDBVRGACTIVESOTDBVGreen(RoHSnoSbBr)CUNIPDAULevelCUNLIMTPSGDBVTACTIVESOTDBVGreen(RoHSnoSbBr)CUNIPDAULevelCUNLIMTPSGDBVTGACTIVESOTDBVGreen(RoHSnoSbBr)CUNIPDAULevelCUNLIMTPSGDBVRACTIVESOTDBVGreen(RoHSCUNIPDAULevelCUNLIMPACKAGEOPTIONADDENDUMwwwticomOctAddendumPageOrderableDeviceStatus()PackageTypePackageDrawingPinsPackageQtyEcoPlan()LeadBallFinishMSLPeakTemp()noSbBr)TPSGDBVRGACTIVESOTDBVGreen(RoHSnoSbBr)CUNIPDAULevelCUNLIMTPSGDBVTACTIVESOTDBVGreen(RoHSnoSbBr)CUNIPDAULevelCUNLIMTPSGDBVTGACTIVESOTDBVGreen(RoHSnoSbBr)CUNIPDAULevelCUNLIMTPSGDBVRACTIVESOTDBVGreen(RoHSnoSbBr)CUNIPDAULevelCUNLIMTPSGDBVRGACTIVESOTDBVGreen(RoHSnoSbBr)CUNIPDAULevelCUNLIMTPSGDBVTACTIVESOT

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