Texas Instruments LP3995 Bedienungsanleitung

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LP3995

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LP3995

SNVS179F–FEBRUARY2003–REVISEDSEPTEMBER2015

LP3995Micropower150-mACMOSVoltageRegulatorWithActiveShutdown

1Features3Description

TheLP3995linearregulatorisdesignedtomeetthe

1

•InputRange:2.5Vto6V

requirementsofportablebattery-powered

•AccurateOutputVoltage:±75mV/2%

applications,providinganaccurateoutputvoltage

•TypicalDropoutwith150mALoad:60mV

withlownoiseandlowquiescentcurrent.Ideally

suitedforpoweringRFandanalogdevices,this

•VirtuallyZeroQuiescentCurrentWhenDisabled

devicecanalsobeusedtomeetmoregeneralcircuit

•LowOutputVoltageNoise

needsinwhichafastturnoffisessential.

•StableWitha1-µFOutputCapacitor

Forbattery-poweredapplicationsthelowdropoutand

•OutputCurrent:150mA

lowgroundcurrentprovidedbythedeviceallowsthe

•FastTurnon:30µs(Typical)

lifetimeofthebatterytobemaximized.The

Enable(/Disable)controlfunctionallowsthesystemto

•FastTurnoff:175µs(Typical)

furtherextendthebatterylifetimebyreducingthe

•StableWithCeramicCapacitor

powerconsumptiontovirtuallyzero.Thisfunction

•LogicControlledEnable

alsoincorporatesanactivedischargecircuitonthe

•FastTurnon

outputforfasterdeviceshutdown.Wherethefast

turnoffisnotrequiredtheLP3999linearregulatoris

•ActiveDisableforFastTurnoff

recommended.TheLP3995alsofeaturesinternal

•Thermal-OverloadandShort-CircuitProtection

protectionagainstshort-circuitcurrentsand

•−40to+125°CJunctionTemperatureRangefor

overtemperatureconditions.

Operation

TheLP3995isdesignedtobestablewithsmall1-µF

ceramiccapacitors.ThesmalloutlineoftheLP3995

2Applications

DSBGApackagewiththerequiredceramiccapacitors

canrealizeasystemapplicationwithinminimalboard

•GSMPortablePhones

area.Performanceisspecifiedfora−40°Cto+125°C

•CDMACellularHandsets

temperaturerange.

•WidebandCDMACellularHandsets

TheLP3995isavailableinfixedoutputvoltagesfrom

•BluetoothDevices

1.5Vto3.3V,inDSBGAorWSONpackages.For

•PortableInformationAppliances

otherpackageoptionsoroutput-voltageoptions,

contactyourlocalTIsalesoffice.

DeviceInformation

(1)

PARTNUMBERPACKAGEBODYSIZE

DSBGA(5)1.502mm×1.045mm(MAX)

LP3995

WSON(6)3.29mm×2.92mm(NOM)

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

TypicalApplicationCircuit

1

AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

Produktspezifikationen