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tps3808g33.pdf

tps3808g33.pdf

上传者: 卡卡西 2011-09-19 评分 0 0 0 0 0 0 暂无简介 简介 举报

简介:本文档为《tps3808g33pdf》,可适用于IT/计算机领域,主题内容包含wwwticomFEATURESDESCRIPTIONAPPLICATIONSTypicalApplicationCircuitVVTPSGTPSG符等。

wwwticomFEATURESDESCRIPTIONAPPLICATIONSTypicalApplicationCircuitVVTPSGTPSGDSPSENSEVDDVDDSENSEVIOVCOREGPIOGNDGNDGNDRESETMRCTCTRESETDBVPACKAGESOT(TOPVIEW)VDDSENSECTRESETGNDMRRESETGNDMRVDDSENSECTDRVPACKAGEmmxmmQFN(TOPVIEW)PowerPADTPSSBVSE–MAY–REVISEDOCTOBERLowQuiescentCurrent,ProgrammableDelaySupervisoryCircuit•PowerOnResetGeneratorwithAdjustableDelayTime:mstosTheTPSxxxfamilyofmicroprocessorsupervisorycircuitsmonitorsystemvoltagesfrom•VeryLowQuiescentCurrent:µAtypVtoV,assertinganopendrainRESETsignal•HighThresholdAccuracy:typwhentheSENSEvoltagedropsbelowapreset•FixedThresholdVoltagesforStandardthresholdorwhenthemanualreset(MR)pindropstoVoltageRailsfromVtoVandAdjustablealogiclowTheRESEToutputremainslowfortheVoltageDowntoVAreAvailableuseradjustabledelaytimeaftertheSENSEvoltageandmanualreset(MR)returnabovetheirthresholds•ManualReset(MR)Input•OpenDrainRESETOutputTheTPSusesaprecisionreferencetoachievethresholdaccuracyforVITVThereset•TemperatureRange:–CtoCdelaytimecanbesettomsbydisconnectingthe•SmallSOTandmmmmQFNPackagesCTpin,msbyconnectingtheCTpintoVDDusingaresistor,orcanbeuseradjustedbetweenmsandsbyconnectingtheCTpintoanexternal•DSPorMicrocontrollerApplicationscapacitorTheTPShasaverylowtypicalquiescentcurrentofµAsoitiswellsuitedto•NotebookDesktopComputersbatterypoweredapplicationsItisavailableinasmall•PDAsHandHeldProductsSOTandanultrasmallmmmmQFN•PortableBatteryPoweredProductsPowerPADpackageandisfullyspecifiedovera•FPGAASICApplicationstemperaturerangeof–CtoC(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()–toCStoragetemperaturerange,TSTG–toCESDrating,HBMkVESDrating,CDMV()StressesbeyondthoselistedunderabsolutemaximumratingsmaycausepermanentdamagetothedeviceThesearestressratingsonly,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedundertheElectricalCharacteristicsisnotimpliedExposuretoabsolutemaximumratedconditionsforextendedperiodsmayaffectdevicereliability()Duetothelowdissipatedpowerinthisdevice,itisassumedthatTJ=TAwwwticomELECTRICALCHARACTERISTICSTPSSBVSE–MAY–REVISEDOCTOBERVVDDV,RLRESET=kΩ,CLRESET=pF,overoperatingtemperaturerange(TJ=–CtoC),unlessotherwisenotedTypicalvaluesareatTJ=CPARAMETERTESTCONDITIONSMINTYPMAXUNITVDDInputsupplyrangeVVDD=V,RESETnotassertedµAMR,RESET,CTopenIDDSupplycurrent(currentintoVDDpin)VDD=V,RESETnotassertedµAMR,RESET,CTopenVVDD<V,IOL=mAVVOLLowleveloutputvoltageVVDDV,IOL=mAVPowerupresetvoltage()VOL(max)=V,IRESET=µAVTPSG–VITV–NegativegoingVITinputthresholdV<VITV–accuracyVITV–C<TJ<C–V<VITV–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,junctiontoambientCW()Thelowestsupplyvoltage(VDD)atwhichRESETbecomesactiveTrise(VDD)µsVwwwticomAdjustableVoltageVersionFixedVoltageVersionResetLogicTimerkVDDVDDGNDVVREFSENSEMRCTRESETTPSGAdjustableVoltageResetLogicTimerkVDDVDDGNDVVREFSENSEMRCTRESETRRRR=MΩPINASSIGNMENTSDBVPACKAGESOT(TOPVIEW)VDDSENSECTRESETGNDMRRESETGNDMRVDDSENSECTDRVPACKAGEmmxmmQFN(TOPVIEW)PowerPADTPSSBVSE–MAY–REVISEDOCTOBERFUNCTIONALBLOCKDIAGRAMSFigureAdjustableandFixedVoltageVersionsTERMINALFUNCTIONSTERMINALSOT(DBV)NAMEPINNODESCRIPTIONRESETRESETisanopendrainoutputthatisdriventoalowimpedancestatewhenRESETisasserted(eithertheSENSEinputislowerthanthethresholdvoltage(VIT)ortheMRpinissettoalogiclow)RESETwillremainlow(asserted)fortheresetperiodafterbothSENSEisaboveVITandMRissettoalogichighApullupresistorfromkΩtoMΩshouldbeusedonthispin,andallowstheresetpintoattainvoltageshigherthanVDDGNDGroundMRDrivingthemanualresetpin(MR)lowassertsRESETMRisinternallytiedtoVDDbyakΩpullupresistorCTResetperiodprogrammingpinConnectingthispintoVDDthroughakΩtokΩresistororleavingitopenresultsinfixeddelaytimes(seeElectricalCharacteristics)ConnectingthispintoagroundreferencedcapacitorpFgivesauserprogrammabledelaytimeSeeSelectingTheResetDelayTimeintheDeviceOperationsectionformoreinformationSENSEThispinisconnectedtothevoltagetobemonitoredIfthevoltageatthisterminaldropsbelowthethresholdvoltageVIT,thenRESETisassertedVDDSupplyvoltageItisgoodanalogdesignpracticetoplaceaµFceramiccapacitorclosetothispinPowerPADPowerPADConnecttogroundplanetoenhancethermalperformanceofpackagewwwticomTimeVVVITVHYSVITVDDVDDMRSENSERESETVDDtDtDtDtD=ResetDelay=UndefinedStateTRUTHTABLETPSSBVSE–MAY–REVISEDOCTOBERTIMINGDIAGRAMFigureTPSTimingDiagramShowingMRandSENSEResetTimingMRSENSE>VITRESETLLLLHLHHwwwticomTYPICALCHARACTERISTICSCCCCIDD(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)SENSETHRESHOLDOVERDRIVEVOLTAGEFigureFigurewwwticomVOLLowLevelRESETVoltage(V)VDD=VRESETCurrent(mA)Temperature(C)NormalizedVIT()VOLLowLevelRESETVoltage(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–REVISEDOCTOBERbythechoiceofresistorFigurebshowsafixedmsdelaytimebyleavingtheCTpinopenFigurecshowsagroundreferencedcapacitorconnectedtoCTforauserdefinedprogramtimebetweenmsandsThecapacitorCTshouldbepFnominalvalueinorderfortheTPSxxxtorecognizethatthecapacitorispresentThecapacitorvalueforagivendelaytimecanbecalculatedusingthefollowingequation: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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