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LP3986

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SNVS142U–AUGUST2001–REVISEDFEBRUARY2013

LP3986DualMicropower150mAUltraLow-DropoutCMOSVoltageRegulatorsinDSBGA

Package

CheckforSamples:LP3986

1

FEATURES

DESCRIPTION

TheLP3986isa150mAduallowdropoutregulator

2

•Miniature8-I/ODSBGAPackage

designedforportableandwirelessapplicationswith

•StableWith1µFCeramicandHighQuality

demandingperformanceandboardspace

TantalumOutputCapacitors

requirements.

•FastTurn-on

TheLP3986isstablewithasmall1µF±30%

•TwoIndependentRegulators

ceramicoutputcapacitorrequiringsmallestpossible

boardspace.

•LogicControlledEnable

•OverCurrentandThermalProtection

TheLP3986'sperformanceisoptimizedforbattery

poweredsystemstodeliverultralownoise,extremely

APPLICATIONS

lowdropoutvoltageandlowquiescentcurrent

independentofloadcurrent.Regulatorgroundcurrent

•CDMACellularHandsets

increasesveryslightlyindropout,furtherprolonging

•GSMCellularHandsets

thebatterylife.Optionalexternalbypasscapacitor

reducestheoutputnoisefurtherwithoutslowingdown

•PortableInformationAppliances

theloadtransientresponse.Faststart-uptimeis

•PortableBatteryApplications

achievedbyutilizingaspeed-upcircuitthatactively

pre-chargesthebypasscapacitor.Powersupply

rejectionisbetterthan60dBatlowfrequenciesand

55dBat10kHz.Highpowersupplyrejectionis

maintainedatlowinputvoltagelevelscommonto

batteryoperatedcircuits.

TheLP3986isavailableinaDSBGApackage.

Performanceisspecifiedfora−40°Cto+125°C

temperaturerange.ForsingleLDOapplications,

pleaserefertotheLP3985datasheet.

Table1.KeySpecifications

VALUEUNIT

Guaranteedoutputcurrentperregulator150mA

Typicalquiescentcurrentwhenbothregulatorsinshutdownmode1nA

Typicaldropoutvoltageat150mAoutputcurrent60mV

Typicalgroundcurrent115µA

Typicaloutputnoise40µV

Fastturn-oncircuit200µs

Junctiontemperature−40to+125°C

1

Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof

TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

2Alltrademarksarethepropertyoftheirrespectiveowners.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2001–2013,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Produktspecifikationer