Texas Instruments LP3988 Bedienungsanleitung

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LP3988

SNVS161E–OCTOBER2001–REVISEDOCTOBER2015

LP3988Micropower,150-mAUltra-Low-DropoutCMOSVoltageRegulator

WithPowerGood

1Features3Description

TheLP3988isa150-mAlowdropoutregulator

1

•InputVoltageRange:2.5Vto6V

designedspeciallytomeetrequirementsofportable

•OutputCurrent:150mA

batteryapplications.TheLP3988isdesignedtowork

•PSRRat10kHz:40dB

withspace-saving,small1-µFceramiccapacitors.

TheLP3988featuresaPowerGood(PG)outputthat

•QuiescentCurrentWhenShutDown:≤1µA

indicatesafaultyoutputcondition.Thedeviceisideal

•FastTurnonTime:100µs(Typical)

formobilephoneandsimilarbattery-powered

•DropoutWith150-mAload:80mV(Typical)

wirelessapplications.Itprovidesupto150mAoutput

currentfroma2.5-Vto6-Vinput,consumingless

•JunctionTemperatureRangeforOperation:

than1µAindisablemodeandhasfastturnontime

−40°Cto+125°C

lessthan200µs.

•Power-GoodFlagOutput

TheLP3988device'sperformanceisoptimizedfor

•LogicControlledEnable

battery-poweredsystemstodeliverlownoise,

•ThermalShutdownandShort-CircuitCurrentLimit

extremelylowdropoutvoltage,andlowquiescent

•StablewithCeramicandHigh-QualityTantalum

current.Regulatorgroundcurrentincreasesonly

Capacitors

slightlyindropout,furtherprolongingthebatterylife.

Powersupplyrejectionisbetterthan60dBatlow

2Applications

frequenciesandstartstorolloffat10kHz.High

•CDMACellularHandsets

power-supplyrejectionismaintaineddowntolower

input-voltagelevelscommontobattery-operated

•WidebandCDMACellularHandsets

circuits.

•GSMCellularHandsets

TheLP3988isavailableina5-pinSOT-23package

•PortableInformationAppliances

anda5-pinthinDSBGApackage.Performanceis

•Tiny3.3V±5%to2.85V,150-mAConverter

specifiedfor−40°Cto+125°Ctemperaturerange.For

allavailableoutputvoltageandpackageoptions,see

thePackageOptionAddendum(POA)attheendof

thedatasheet.

DeviceInformation

(1)

PARTNUMBERPACKAGEBODYSIZE(NOM)

SOT-23(5)2.90mm×1.60mm

LP3988

DSBGA(5)1.502mm×1.045mm

(2)

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

(2)Bodysizedimensionismaximum.

SimplifiedSchematic

1

AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

Produktspezifikationen