Texas Instruments LP3990 Handleiding

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EN

INOUT

GND

V

IN

V

EN

GND

V

OUT

LP3990

C

OUT

1 µF

C

IN

1 µF

OFF

ON

GND

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LP3990

SNVS251J–MAY2004–REVISEDSEPTEMBER2014

LP3990150-mALinearVoltageRegulatorforDigitalApplications

1Features3Description

TheLP3990regulatorisdesignedtomeetthe

1

•1%VoltageAccuracyatRoomTemperature

requirementsofportable,battery-poweredsystems

•StablewithCeramicCapacitor

providinganaccurateoutputvoltage,low-noise,and

•LogicControlledEnable

low-quiescentcurrent.TheLP3990willprovidea0.8-

Voutputfromthelowinputvoltageof2Vatuptoa

•NoNoiseBypassCapacitorRequired

150-mAloadcurrent.Whenswitchedintoshutdown

•Thermal-OverloadandShort-CircuitProtection

modeviaalogicsignalattheenablepin(EN),the

•InputVoltageRange,2Vto6V

powerconsumptionisreducedtovirtuallyzero.

•OutputVoltageRange,0.8Vto3.3V

TheLP3990isdesignedtobestablewithspace-

•OutputCurrent,150mA

savingceramiccapacitorswithvaluesaslowas1µF.

•OutputStable-Capacitors,1µF

Performanceisspecifiedfora–40°Cto125°C

•VirtuallyZeroI

Q

(Disabled),<10nA

junctiontemperaturerange.

•VeryLowI

Q

(Enabled),43µA

Foroutputvoltagesotherthan0.8V,1.2V,1.35V,

•LowOutputNoise,150µV

RMS

1.5V,1.8V,2.5V,2.8V,or3.3V,pleasecontact

theTexasInstrumentssalesoffice.

•PSRR,55dBat1kHz

•FastStart-Up,105µs

DeviceInformation

(1)

PARTNUMBERPACKAGEBODYSIZE(NOM)

2Applications

DSBGA(4)1.324mmx1.045mm(MAX)

•CellularHandsets

LP3990WSON(6)2.90mmx1.60mm

•Hand-HeldInformationAppliances

SOT-23(5)3.00mmx3.00mm

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

SimplifiedSchematic

1

AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

Product specificaties