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LP38690

-ADJ

INOUT

GND

V

OUT

V

IN

R1

R2

ADJ

LP38692

-ADJ

IN

OUT

GND

V

OUT

V

IN

R1

R2

V

EN

EN

ADJ

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Reference

Design

AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

LP38690-ADJ

,

LP38692-ADJ

SNVS323I–DECEMBER2004–REVISEDFEBRUARY2016

LP3869x-ADJ1-ALowDropoutCMOSLinearRegulatorWithAdjustableOutput-

StableWithCeramicOutputCapacitors

1

1Features

1

•InputVoltageRange:2.7Vto10V

•OutputVoltageRange:1.25Vto9V

•2.5%AdjustPinVoltageAccuracy(25°C)

•LowDropoutVoltage:450mVat1A(5-VTypical

V

OUT

)

•Precision(Trimmed)BandgapReference

•EnsuredSpecsfor–40°Cto+125°C

•1-µAOff-StateQuiescentCurrent

•ThermalOverloadProtection

•FoldbackCurrentLimiting

•Enable(EN)Pin(LP38692-ADJ)

•5-PinSOT-223and6-PinWSONPackages

2Applications

•HardDiskDrives

•NotebookComputers

•Battery-PoweredDevices

•PortableInstrumentation

3Description

TheLP38690-ADJandLP38692-ADJlowdropout

CMOSlinearregulatorsprovide2.5%precision

referencevoltage,extremelylowdropoutvoltage

(450mVat1-Aloadcurrent,V

OUT

=5V)and

excellentACperformanceutilizingultralowequivalent

seriesresistance(ESR)ceramicoutputcapacitors.

ThelowthermalresistanceoftheWSONandSOT-

223packagesallowthefulloperatingcurrenttobe

usedeveninhighambienttemperature

environments.

TheuseofaPMOSpowertransistormeansthatno

DCbasedrivecurrentisrequiredtobiasitallowing

groundpincurrenttoremainbelow100µA

regardlessofloadcurrent,inputvoltage,oroperating

temperature.

•DropoutVoltage:450mV(typical)at1A(typical

5-Vout)

•GroundPinCurrent:55µA(typical)atfullload

•AdjustPinVoltage:2.5%(25°C)accuracy

DeviceInformation

(1)

PARTNUMBERPACKAGEBODYSIZE(NOM)

LP38690-ADJ

WSON(6)3.00mm×3.00mm

LP38692-ADJ

LP38692-ADJSOT-223(5)6.50mm×3.56mm

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

SimplifiedSchematicLP38690-ADJSimplifiedSchematicLP38692-ADJ

V

OUT

=V

ADJ

×(1+R1/R2)

Produktspecifikationer