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2.2 PF

SHDN

GND

IN

OUT

FAULT

100

kŸ

2.2 PF

CERAMIC

V

IN

V

O

CC

33 nF

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Design

AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

LP3982

SNVS185F–FEBRUARY2002–REVISEDAPRIL2017

LP3982Micropower,Ultra-Low-Dropout,Low-Noise,300-mACMOSRegulator

1

1Features

1

•2.5-Vto6-VInputRange

•MAX8860Pin,Package,andSpecification

Compatible

•300-mAOutputCurrent

•120-mVTypicalDropoutat300mA

•90-μATypicalQuiescentCurrent

•1-nATypicalShutdownMode

•60-dBTypicalPSRR

•120-μsTypicalTurnonTime

•StableWithSmallCeramicOutputCapacitors

•37-μV

RMS

OutputVoltageNoise

(10Hzto100kHz)

•Overtemperature/OvercurrentProtection

•±2%OutputVoltageTolerance

•CreateaCustomDesignUsingtheLP3982With

theWEBENCH

®

PowerDesigner

2Applications

•WirelessHandsets

•DSPCorePower

•BatteryPoweredElectronics

•PortableInformationAppliances

3Description

TheLP3982low-dropout(LDO)CMOSlinear

regulatorisavailablein1.8-V,2.5-V,2.82-V,3-V,

3.3-V,andadjustableversions.Theydeliver300mA

ofoutputcurrent.Packagedinan8-pinVSSOP,the

LP3982ispin-andpackage-compatiblewithMaxim's

MAX8860.TheLM3982isalsoavailableinthesmall

footprintWSONpackage.

TheLP3982suitsbattery-poweredapplications

becauseofitsshutdownmode(1nAtypical),low

quiescentcurrent(90μAtypical),andLDOvoltage

(120mVtypical).Thelowdropoutvoltageallowsfor

moreutilizationofabattery’savailableenergyby

operatingclosertoitsend-of-lifevoltage.TheLP3982

device'sPMOSoutputtransistorconsumesrelatively

nodrivecurrentcomparedtoPNPLDOregulators.

ThisPMOSregulatorisstablewithsmallceramic

capacitiveloads(2.2μFtypical).

Thesedevicesalsoincluderegulationfaultdetection,

abandgapvoltagereference,constantcurrent

limiting,andthermal-overloadprotection.

DeviceInformation

(1)

PARTNUMBERPACKAGEBODYSIZE(NOM)

LP3982

WSON(8)2.50mm×3.00mm

VSSOP(8)3.00mm×3.00mm

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

ApplicationCircuit(FixedV

OUT

Version)

Produktspecifikationer