Texas Instruments LP3882 Handleiding

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LP3882

www.ti.com

SNVS226F–MARCH2003–REVISEDAPRIL2013

LP38821.5AFast-ResponseUltraLowDropoutLinearRegulators

CheckforSamples:LP3882

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FEATURES

DESCRIPTION

TheLP3882isahighcurrent,fastresponseregulator

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•UltraLowDropoutVoltage(110mVat

whichcanmaintainoutputvoltageregulationwith

1.5Atyp)

minimuminputtooutputvoltagedrop.Fabricatedon

•LowGroundPinCurrent

aCMOSprocess,thedeviceoperatesfromtwoinput

voltages:Vbiasprovidesvoltagetodrivethegateof

•LoadRegulationof0.04%/A

theN-MOSpowertransistor,whileVinistheinput

•60nATypicalQuiescentCurrentinShutdown

voltagewhichsuppliespowertotheload.Theuseof

•1.5%OutputAccuracy(25°C)

anexternalbiasrailallowstheparttooperatefrom

•TO-220,DDPAK/TO-263andSOPowerPadultralowVinvoltages.Unlikebipolarregulators,the

CMOSarchitectureconsumesextremelylow

Packages

quiescentcurrentatanyoutputloadcurrent.Theuse

•OverTemperature/OverCurrentProtection

ofanN-MOSpowertransistorresultsinwide

•−40°Cto+125°CJunctionTemperatureRange

bandwidth,yetminimumexternalcapacitanceis

requiredtomaintainloopstability.

APPLICATIONS

Thefasttransientresponseofthesedevicesmakes

•DSPPowerSupplies

themsuitableforuseinpoweringDSP,

MicrocontrollerCorevoltagesandSwitchMode

•ServerCoreandI/OSupplies

PowerSupplypostregulators.Thepartsareavailable

•PCAdd-in-Cards

inTO-220,DDPAK/TO-263andSOPowerPad

•LocalRegulatorsinSet-TopBoxes

packages.

•MicrocontrollerPowerSupplies

DropoutVoltage:110mV(typ)at1.5Aloadcurrent.

•HighEfficiencyPowerSupplies

GroundPinCurrent:3mA(typ)atfullload.

•SMPSPost-Regulators

ShutdownCurrent:60nA(typ)whenS/Dpinislow.

PrecisionOutputVoltage:1.5%roomtemperature

accuracy.

TYPICALAPPLICATIONCIRCUIT

Atleast4.7µFofinputandoutputcapacitanceisrequiredforstability.

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Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof

TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

2Alltrademarksarethepropertyoftheirrespectiveowners.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2003–2013,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Product specificaties