Texas Instruments LP2989LV Handleiding

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LP2989LV

SNVS086K–MAY2000–REVISEDJULY2015

LP2989LVMicropowerandLow-Noise,500-mAUltraLow-DropoutRegulatorforUseWith

CeramicOutputCapacitors

1Features3Description

TheLP2989LVisafixed-output500-mAprecision

1

•2.1-Vto16-VInputVoltageRange

LDOregulatordesignedforusewithceramicoutput

•Ultra-LowDropoutVoltage

capacitors.

•500-mAContinuousOutputCurrent

Outputnoisecanbereducedto18μV(typical)by

•VeryLowOutputNoiseWithExternalCapacitor

connectinganexternal10-nFcapacitortothebypass

•<0.8-µAQuiescentCurrentWhenShutDown

pin.

•LowGroundPinCurrentatAllLoads

UsinganoptimizedVerticallyIntegratedPNP(VIP)

•0.75%OutputVoltageAccuracy(AGrade)

process,theLP2989LVdeliverssuperior

performance:

•HighPeakCurrentCapability(800-mAtypical)

•OvertemperatureandOvercurrentProtection

GroundPinCurrent:Typically3mAat500-mAload,

and110µAat100-µAload.

•−40°Cto+125°CJunctionTemperatureRange

SleepMode:TheLP2989LVdrawslessthan0.8-µA

2Applications

quiescentcurrentwhenSHUTDOWNpinispulled

low.

•NotebooksandDesktopPCs

ERRORFlag:Thebuilt-inERRORflaggoeslow

•PDAsandPalmtopComputers

whentheoutputdropsapproximately5%below

•WirelessCommunicationPins

nominal.

•SMPSPost-Regulators

PrecisionOutput:Outputvoltageaccuracyis0.75%

(Agrade)and1.25%(standardgrade)atroom

temperature.

Foroutputvoltagesgreaterthanorequalto2V,see

theLP2989(SNVS083)datasheet.

DeviceInformation

(1)

PARTNUMBERPACKAGEBODYSIZE(NOM)

WSON(8)4.00mmx4.00mm

LP2989LV

SOIC(8)4.90mmx3.91mm

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

TypicalApplication

*Capacitancevaluesshownareminimumrequiredtoassurestability,butmaybeincreasedwithoutlimit.Larger

outputcapacitorprovidesimproveddynamicresponse.SeetheOutputCapacitorsection.

**Shutdownmustbeactivelyterminated(seetheShutdownInputOperationsection).TietoIN(pin4)ifnotuse.

1

AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

Product specificaties