HT7827
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HT78XXSeries500mATinyPowerTMLDO
SelectionTablePartNo.OutputVoltageTolerancePackageHT78181.8V
±2%SOT-89TO-92HT78252.5VHT78272.7VHT78303.0VHT78333.3VHT78505.0V
BlockDiagram
Rev.1.001March2,2007Features·Outputvoltageranges:Fixedrangeof1.8V,2.5V,2.7V,3.0V,3.3V,5.0Vtype.·Highlyaccuracy:±2%·Lowvoltagedrop:360mV(typ.),VOUT=5.0Vat500mA·Guaranteedoutputcurrent:500mA·Lowquiescentcurrent:5mA(typ.)·Currentlimiting·Over-temperatureshutdown·SOT-89,TO-92Packages
Applications·Batterypoweredsystems·PersonalDigitalAssistants·Peripheralcards·PCMCIAcards·PersonalCommunicationEquipment
GeneralDescriptionTheHT78XXseriesofpositive,linearregulatorsfea-tureslowquiescentcurrent(5mAtyp.)withlowdropoutvoltage,makingthemidealforbatteryapplications.Thedevicesarecapableofsupplying500mAofoutputcur-rentcontinuously.Theyareavailablewithseveralfixedoutputvoltagesrangingfrom1.8Vto5.0V.Althoughdesignedprimarilyasfixedvoltageregulators,thesedevicescanbeusedwithexternalcomponentstoobtainvariablevoltagesandcurrents.TheseruggeddeviceshaveThermalShutdownandCurrentLimitingtopreventdevicefailureunderthe²Worst²ofoperating
conditions.PinAssignment
AbsoluteMaximumRatings*MaximumSupplyVoltage............................upto8.5VStorageTemperature..........................-50°Cto125°COperatingTemperature.........................-40°Cto85°CNote:Thesearestressratingsonly.Stressesexceedingtherangespecifiedunder²AbsoluteMaximumRatings²maycausesubstantialdamagetothedevice.Functionaloperationofthisdeviceatotherconditionsbeyondthoselistedinthespecificationisnotimpliedandprolongedexposuretoextremeconditionsmayaffectdevicereliability.²*²Absolutemaximumratingsindicatelimitsbeyondwhichdamagetothedevicemayoccur.OperatingRatingsin-dicateconditionsforwhichthedeviceisintendedtobefunctional,butdonotguaranteespecificperformancelimits.Theguaranteedspecificationsapplyonlyforthetestconditionslisted.
ThermalInformationSymbolParameterPackageMax.Unit
qJAThermalResistance(Junctionto
Ambient)(Assumenoambientairflow,noheatsink)SOT-89200°C/WTO-92200°C/W
PDPowerDissipationSOT-890.50WTO-920.50WNote:PDismeasuredat
Ta=25°CHT78XXSeries
Rev.1.002March2,2007ElectricalCharacteristicsTj=25°C,VIN=VOUT+1.0V,IO=1mA,unlessotherwisespecifiedSymbol
Parameter
TestConditionsMin.Typ.Max.UnitVINInputVoltage¾¾¾8VDVOUTOutputVoltageTolerance¾-2¾2%ISSQuiescentCurrentIO=0mA¾57mADVLOADLoadRegulation(Note1)1mA£IOUT£500mA¾0.0040.008%/mA
VDROPDropoutVoltage(Note2)DVOUT=2%IOUT=500mAVO£1.8V¾8001200mV2.5V£VO£2.7V¾5006503.0V£VO£5.0V¾360500DVLINELineRegulationVOUT+1.0V£VIN£8.0V¾0.20.3%/VILIMCurrentLimit(Note3)DVOUT=10%500¾¾mATemperatureCoefficient-40°C
ApplicationCircuitsBasicCircuits
TypicalApplicationCircuits·HighoutputcurrentpositivevoltageregulatorHT78XXSeries
Rev.1.003March2,2007·IncreasedOutputvoltageCircuit
V=V(1+R2R1)+IR2OUTXXSS·DualSupplyCircuit
V=V+VOUT1XX2XX1V=VOUT2XX2
·TrackingVoltageRegulator
-V=VxRROOA
BHT78XXSeries
Rev.1.004March2,2007PackageInformation3-PinSOT-89OutlineDimensionsSymbol
DimensionsinmilMin.Nom.Max.A173¾181B64¾72C90¾102D35¾47E155¾167F14¾19G17¾
22H¾59¾I55¾63J14¾17HT78XXSeries
Rev.1.005March2,20073-PinTO-92OutlineDimensionsSymbol
DimensionsinmilMin.Nom.Max.A170¾200B170¾200C500¾¾D11¾20E90¾110F45¾55G45¾
65H130¾160I8¾18a4°¾6°HT78XXSeries
Rev.1.006March2,2007ProductTapeandReelSpecificationsReelDimensionsSOT-89
SymbolDescriptionDimensionsinmmAReelOuterDiameter180±1.0BReelInnerDiameter62±1.5CSpindleHoleDiameter12.75+0.15DKeySlitWidth1.9±0.15T1Space
BetweenFlange12.4+0.2T2ReelThickness17-0.4HT78XXSeries
Rev.1.007March2,2007TO-92ReelDimensions(Unit:mm)HT78XXSeries
Rev.1.008March2,2007CarrierTapeDimensionsSOT-89
SymbolDescriptionDimensionsinmmWCarrierTapeWidth12.0+0.3-0.1PCavityPitch8.0±0.1EPerforationPosition1.75±0.1FCavitytoPerforation(WidthDirection)5.5±0.05
DPerforationDiameter1.5+0.1D1CavityHoleDiameter1.5+0.1P0PerforationPitch4.0±0.1P1CavitytoPerforation(LengthDirection)2.0±0.10A0CavityLength4.8±0.1B0CavityWidth4.5±0.1K0CavityDepth1.8±0.1tCarrierTapeThickness0.30±0.013CCoverTapeWidth9.3HT78XXSeries
Rev.1.009March2,2007
