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INOUT

S/D

ADJ

BYPASSGND

LP3878-ADJ

V

IN

**S/D

*0.01 µF

V

OUT

*4.7 µF

(Ceramic or

Tantalum

recommended)

*10 µF

(Ceramic

recommended)

C

FF

R1

R2

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Design

LP3878-ADJ

SNVS311D–MAY2005–REVISEDFEBRUARY2015

LP3878-ADJMicropower800-mALow-Noise"CeramicStable"AdjustableVoltage

Regulatorfor1-Vto5-VApplications

1Features3Description

TheLP3878-ADJisan800-mA,adjustableoutput,

1

•InputSupplyVoltage:2.5Vto16V

voltageregulatordesignedtoprovidehigh

•OutputVoltageRange:1Vto5.5V

performanceandlownoiseinapplicationsrequiring

•DesignedforUseWithLow-ESRCeramic

outputvoltagesaslowas1V.

Capacitors

UsinganoptimizedVIP(VerticallyIntegratedPNP)

•VeryLowOutputNoise

process,theLP3878-ADJdeliverssuperior

•8-LeadSOPowerPAD™andWSONSurface-

performance:

MountPackages

•GroundPinCurrent:Typically5.5mAat800-mA

load,and180µAat100-µAload.

•<10-μAQuiescentCurrentinShutdown

•LowPowerShutdown:TheLP3878-ADJdraws

•LowGroundPinCurrentatallLoads

lessthan10-μAquiescentcurrentwhenthe

•OvertemperatureandOvercurrentProtection

SHUTDOWNpinispulledlow.

•–40°Cto125°COperatingJunctionTemperature

•PrecisionOutput:Ensuredoutputvoltage

Range

accuracyis1%atroomtemperature.

•LowNoise:Broadbandoutputnoiseisonly18μV

2Applications

(typical)witha10-nFbypasscapacitor.

•ASICPowerSuppliesIn:

DeviceInformation

(1)

–Desktops,Notebooks,andGraphicCards

PARTNUMBERPACKAGEBODYSIZE(NOM)

–SetTopBoxes,Printers,andCopiers

SOPowerPAD(8)4.89mm×3.90mm

LP3878-ADJ

•DSPandFPGAPowerSupplies

WSON(8)4.00mm×4.00mm

•SMPSPost-Regulator

(1)Forallavailablepackages,seetheorderableaddendumat

•MedicalInstrumentation

theendofthedatasheet.

BasicApplicationCircuit

*Capacitorvaluesshownareminimumrequiredtoassurestability.Alargeroutputcapacitorprovidesimproved

dynamicresponse.OutputcapacitormustmeetESRrequirements(seeApplicationInformation).

**TheSHUTDOWN(orS/D)pinmustbeactivelyterminated(seeDeviceFunctionalModes).TietoIN(pin4)ifnot

used.

1

AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

Produktspecifikationer