LMS33460 3-V Undervoltage Detector - TI.com

1 VINGNDGNDVDDVDDCPUR470 k: LMS33460 RESETVOUTC opyright 2016, Texas Instruments IncorporatedProductFolderSample &BuyTechnicalDocumentsTools &SoftwareSupport &CommunityAn IMPORTANTNOTICEat the end of this datasheetaddressesavailability,warranty, changes,use in safety-criticalapplications,intellectual propertymattersand MARCH2001 REVISEDDECEMBER2016 LMS334603-V UndervoltageDetector11 Features1 Ultra-LowPower 3-V Detection V to 7 V Open-DrainOutput Ultra-Small5-PinSC70 Package ExtendedTemperatureRange( 40 C to 85 C) Ultra-LowQuiescentCurrent(1 A Typical)2 Applications Low BatteryVoltageDetectors PowerFail Indicators ProcessorResetGenerators BatteryBackupControls Battery-OperatedEquipment Hand-HeldInstruments UndervoltageDetectors3 DescriptionTheLMS33460deviceis an undervoltagedetectorwitha 3 V LMS33460is specificallydesignedto is especiallysuitedto battery-poweredsystemswherelowquiescentc urrentand smallsize are ICgeneratesan activeoutputwhenevertheinputvoltagedrops below3 usesa precisionon-chipvoltagereferenceand a comparatorto measurethe hysteresishelpsto preventerraticoperationin thepresenceof UVDis availablein the (1)PARTNUMBERPACKAGEBODYSIZE(NOM)LMS3346 0SC70(5) (1)

2 For all availablepackages,see the orderableaddendumatthe end of the MARCH2001 : LMS33460 SubmitDocumentationFeedbackCopyright 2001 2016,TexasInstrumentsIncorporatedTableof Contents1 Pin Configurationand Applicationand Deviceand Mechanical,Packaging,and RevisionHistoryNOTE:Pagenumbersfor previousrevisionsmay differfrompagenumbersin the (April2013)to RevisionEPage AddedESDR atingstable,FeatureDescriptionsection,De viceFunctionalModes,ApplicationandImplem entationsection,PowerSupplyRecommendatio nssection,Layoutsection,DeviceandDocumen tationSupportsection,andMechanical,Packa ging, DeletedOrderingInformationtable;see POAat the end of the ChangedR JAvalueFrom:478 To: (April2013)to RevisionDPage Changedlayoutof NationalSemiconductorDataSheetto TI to MARCH2001 REVISEDDECEMBER2016 ProductFolderLinks: LMS33460 SubmitDocumentationFeedbackCopyright 2001 2016,TexasInstrumentsIncorporated5 Pin Configurationand FunctionsDCKP ackage5-PinSC70 Top ViewPin Internallyconnectedto be left floatingor connectedto GND(pin 3).

3 GND3 GroundNC1 No connectionVIN5 IInputsupplyVOUT4 OVoltageoutput(1)Stressesbeyondthoselist edunderAbsoluteMaximumRatingsmay causepermanentdamageto the stressratingsonly,whichdo not implyfunctionaloperationof the deviceat theseor any otherconditionsbeyondthoseindicatedunder RecommendedOperatingConditions. Exposureto absolute-maximum-ratedconditionsfor extendedperiodsmay (unlessotherwisenoted)(1)MINMAXUNITI nputvoltageto GND8 VOutputvoltageto GND8 VOutputcontinuousoutputcurrent30mAVaporp haseIR convectionreflow240 CJunctiontemperature,TJ150 CStoragetemperature,Tstg 65150 C(1)JEDEC documentJEP155statesthat 500-VHBM allowssafe manufacturingwith a (ESD)ElectrostaticdischargeHuman-bodymod el(HBM),per ANSI/ESDA/JEDECJS-001(1) 2500 VMachinemodel 4085 C4 LMS33460 SNVS158E MARCH2001.

4 LMS33460 SubmitDocumentationFeedbackCopyright 2001 2016,TexasInstrumentsIncorporated(1)For moreinformationabouttraditionaland new thermalmetrics,see (1) LMS33460 UNITDCK(SC70)5 PINSR C/WR JC(top)Junction-to-case(top) C/WR JBJunction-to-boardthermalresistance54 C/W C/W C/W(1) V, but is very low in the 25 C (unlessotherwisenoted) AVIN= AVIN= 7 V(1)25200 AVIN(MAX)Maximumoperatingvoltage7 VVIN(MIN) 40 C to 85 (LOW)OutputcurrentlowVOUT= , VIN= V, VIN= V211tPDHLO utputdelaytime (outputtransitionhigh to low )CL= 10 pF, RL= 470 k 130200 s VDET/ TDetectvoltagetemperaturecoefficientTJ= 40 C to 85 C 120 PPM/ C-40-1510356085110 TEMPERATURE ( C)050100150200250300 OUTPUT DELAY TIME ( s)tPDHLVINVOUTtPDHL-40-1510356085110 TEMPERATURE ( C)OUTPUT DELAY TIME ( s)tPDLHVINVOUTtPDLH050100150200250300-50 -250255075100 TEMPERATURE ( C) (VIN RISING)VDET (VIN FALLING) THRESHOLD (V) CURRENT ( A)INPUT VOLTAGE VIN (V) MARCH2001 REVISEDDECEMBER2016 ProductFolderLinks: LMS33460 SubmitDocumentationFeedbackCopyright 2001 2016, 25 C, RL= 470 k , and CL= 10 pF (unlessotherwisenoted)Figure1.

5 DetectorThresholdvs TemperatureFigure2. SupplyCurrentvs InputVoltageFigure3. PropagationDelayTime(tPDHL) vs TemperatureFigure4. PropagationDelayTime(tPDLH) vs TemperatureFigure5. VOUT(LOW)vs VINVINGND+ VRL470 k:CL10 pFLMS33640 VOUTC opyright 2016, Texas Instruments VOLTAGEOUTPUT VOLTAGEVDETVHYSVIN(MIN)VIN RisingThresholdVIN FallingThreshold6 LMS33460 SNVS158E MARCH2001 : LMS33460 SubmitDocumentationFeedbackCopyright 2001 2016,TexasInstrumentsIncorporated7 a micropowerundervoltage-sensingcircuitwit han open-drainoutputconfiguration,whichrequi resa pull LMS33460featuresa voltagereference,a comparatorwithprecisethresholdsand PropagationDelayTimingDiagramFigure7.

6 PropagationDelayTestCircuitVINGNDVREFLMS 33460+-Copyright 2016, Texas Instruments MARCH2001 REVISEDDECEMBER2016 ProductFolderLinks: LMS33460 SubmitDocumentationFeedbackCopyright 2001 2016, inputsupply(VIN) is the voltagethat is beingmonitoredand as it decreasespast3 V, the active-lowoutput(VOUT) transitionsto a logiclow V plus the built-inhysterisis,VOUT returnsto itsoriginalstateof LMS33460has built-inhysteresiswhenthe inputsupplyis comingbackup tohelp preventerraticoutputoperationwhenthe inputvoltagecrossesthe LMS33460is usefulin a varietyof applicationsthat requirelow voltagedetectionand is suitedfor battery-poweredsystemswherelow quiescentcurrentand smallpackagesizeis can alsobe usedas aprecisionresetcircuitfor the inputvoltage(VIN) rampsup, the output(VOUT)

7 Remainslogiclow until due to the built-in hysteresis(nominally150 mV).AfterVINcrossesthat threshold,VOUT remainslogichighuntil VINdropsbelowthe 3-V hysteresisonly appliesto the k: LMS33460 RESETVOUTC opyright 2016, Texas Instruments Incorporated8 LMS33460 SNVS158E MARCH2001 : LMS33460 SubmitDocumentationFeedbackCopyright 2001 2016,TexasInstrumentsIncorporated8 Applicationand ImplementationNOTEI nformationin the followingapplicationssectionsis not partof the TI componentspecification,and TI doesnot warrantits accuracyor s customersareresponsiblefor determiningsuitabilityof componentsfor test theirdesignimplementationto idealto use in battery-poweredor microprocessorbasedsystemsand can be usedas a lowvoltageindicatoror this designexample.

8 Use the parameterslistedin Table1 as the DesignParametersPARAMETEREXAMPLEVALUEI nputsupplyvoltagemaximum7 VVOUT maximum7 VVOUT minimum0 VPullupresistor470 k LMS33460is a veryeasyto use low that requiredis the inputsupplyvoltageand apullupresistorat the recommends470 k for the MARCH2001 REVISEDDECEMBER2016 ProductFolderLinks: LMS33460 SubmitDocumentationFeedbackCopyright 2001 2016, 475 k * See Figure4 for tPDLH values** See Figure3 for tPDHL valuesFigure9. LMS33460 Turnon9 PowerSupplyRecommendationsThe inputof the LMS33460is designedto handleup to the recommendedsupplyvoltageof 7 V and remaininthe inputcapacitoris outputpullupresistor,and delaycapacitorif used,as closeas possibleto the IC.

9 Keeptracesshortbetweenthe IC and the componentsusedat the outputto ensurethe timingdelayis as accurateas LayoutExampleDiagram10 LMS33460 SNVS158E MARCH2001 : LMS33460 SubmitDocumentationFeedbackCopyright 2001 2016,TexasInstrumentsIncorporated11 Deviceand DocumentationUpdatesTo receivenotificationof documentationupdates,navigateto the deviceproductfolderon the upperrightcorner,clickonAlertmeto registerand receivea weeklydigestof any productinformationthat changedetails,reviewthe revisionhistoryincludedin any followinglinksconnectto TI provided"AS IS" by the not constituteTI specificationsand do not necessarilyreflectTI's views;see TI's E2E OnlineCommunityTI'sEngineer-to-Engineer( E2E)

10 ,you can ask questions,shareknowledge,exploreideasand helpsolveproblemswith 'sDesignSupportQuicklyfind helpfulE2E forumsalongwith designsupporttoolsandcontactinformationf or is a trademarkof othertrademarksare the propertyof be damagedby all integratedcircuitsbe observeproperhandlingand installationprocedurescan rangefromsubtleperformancedegradationto be moresusceptibleto damagebecausevery smallparametricchangescouldcausethe devicenot to meetits glossarylists and explainsterms,acronyms,and Mechanical,Packaging,and OrderableInformationThe followingpagesincludemechanical,packagin g,and the mostcurrentdataavailablefor the subjectto changewithoutnoticeand revisionofthis browser-basedversionsof this datasheet,referto the OPTION 1 PACKAGING INFORMATIONO rderable DeviceStatus(1)Package TypePackageDrawingPinsPackageQtyEco Plan(2)Lead finish/Ball material(6)MSL Peak Temp(3)Op Temp ( C)Device Marking(4/5)SamplesLMS33460 MGNRNDSC70 DCK51000 Non-RoHS& GreenCall TILevel-1-260C-UNLIM-40 to 85C33 LMS33460MG/NOPBACTIVESC70 DCK51000 RoHS & GreenSNLevel-1-260C-UNLIM-40 to 85C33 (1) The marketing status values are defined as follows:ACTIVE: Product device recommended for new.