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Design

AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

LP2954

,

LP2954A

SNVS096E–JUNE1999–REVISEDJULY2016

LP2954,LP2954A5-VandAdjustableMicropowerLDOs

1

1Features

1

•5-VOutputwithin1.2%OverTemperature

(AGrade)

•Adjustable1.23-Vto29-VOutputVoltage

Available(LP2954IMandLP2954AIM)

•Ensured250-mAOutputCurrent

•ExtremelyLowQuiescentCurrent

•LowDropoutVoltage

•ReverseBatteryProtection

•ExtremelyTightLineandLoadRegulation

•VeryLowTemperatureCoefficient

•CurrentandThermalLimiting

•PinCompatiblewithLM2940andLM340

(5-VVersionOnly)

•AdjustableVersionAddsERRORFlagtoWarnof

OutputDropandaLogic-ControlledShutdown

2Applications

•High-EfficiencyLinearRegulator

•LowDropoutBattery-PoweredRegulator

3Description

TheLP2954isa5-VmicropowerLDOwithverylow

quiescentcurrent(90μAtypicalat1-mAload)and

verylowdropoutvoltage(typically60mVatlight

loadsand470mVat250-mAloadcurrent).

Thequiescentcurrentincreasesonlyslightlyat

dropout(120μAtypical),whichprolongsbatterylife.

TheLP2954withafixed5-Voutputisavailablein

three-pinTO-220andDDPAK/TO-263packages.The

adjustableLP2954isprovidedinan8-pin,small-

outlineSOICpackage.Theadjustableversionalso

providesaresistornetworkwhichcanbepin

strappedtosettheoutputtoanyvoltagefromto

1.23Vto29V.

ReversebatteryprotectionisprovidedfortheINpin.

Thetightlineandloadregulation(0.04%typical),as

wellasverylowoutputtemperaturecoefficientmake

theLP2954wellsuitedforuseasalow-power

voltagereference.

Outputaccuracyisensuredatbothroomtemperature

andovertheentireoperatingtemperaturerange.

DeviceInformation

(1)

PARTNUMBERPACKAGEBODYSIZE(NOM)

LP2954

SOIC(8)4.90mm×3.91mm

DDPAK/TO-263(3)10.18mm×8.41mm

TO-220(3)14.986mm×10.16mm

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

SimplifiedSchematic

Produktspecifikationer