Texas Instruments LP2988 Handleiding

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LP2987,LP2988

www.ti.com

SNVS004J–MARCH1999–REVISEDAPRIL2013

LP2987/LP2988Micropower,200mAUltraLow-DropoutVoltageRegulatorwith

ProgrammablePower-OnResetDelay;LowNoiseVersionAvailable(LP2988)

CheckforSamples:LP2987,LP2988

1

FEATURES

DESCRIPTION

TheLP2987/8arefixed-output200mAprecisionLDO

2

•UltraLowDropoutVoltage

voltageregulatorswithpower-ONresetdelaywhich

•Power-ONResetDelayRequiresOnlyOne

canbeimplementedusingasingleexternalcapacitor.

Component

TheLP2988isspecificallydesignedfornoise-critical

•BypassPinforReducedOutputNoise

applications.Asingleexternalcapacitorconnectedto

(LP2988)

theBypasspinreducesregulatoroutputnoise.

•SpecifiedContinuousOutputCurrent200mA

UsinganoptimizedVIP(VerticallyIntegratedPNP)

•SpecifiedPeakOutputCurrent>250mA

process,theseregulatorsdeliversuperior

•SOIC-8andVSSOP-8SurfaceMountPackages

performance:

•<2μAQuiescentCurrentwhenShutdown

DropoutVoltage:180mV@200mAload,and1

•LowGroundPinCurrentatAllLoads

mV@1mAload(typical).

•0.5%OutputVoltageAccuracy(“A”Grade)

GroundPinCurrent:1mA@200mAload,and200

μA@10mAload(typical).

•WideSupplyVoltageRange(16VMax)

•Overtemperature/overcurrentProtection

SleepMode:TheLP2987/8drawslessthan2μA

quiescentcurrentwhenshutdownpinisheldlow.

•−40°Cto+125°CJunctionTemperatureRange

ErrorFlag/Reset:Theerrorflaggoeslowwhenthe

APPLICATIONS

outputdropsapproximately5%belownominal.This

pinalsoprovidesapower-ONresetsignalifa

•CellularPhone

capacitorisconnectedtotheDELAYpin.

•Palmtop/LaptopComputer

PrecisionOutput:Standardproductversionsofthe

•Camcorder,PersonalStereo,Camera

LP2987andLP2988areavailablewithoutput

voltagesof5.0V,3.8V,3.3V,3.2V,3.0V,or2.8V,with

specifiedaccuracyof0.5%(“A”grade)and1%

(standardgrade)atroomtemperature.

BlockDiagram

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Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof

TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

2Alltrademarksarethepropertyoftheirrespectiveowners.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©1999–2013,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Product specificaties