2024年4月19日发(作者：)

元器件交易网

LP2985LV

Micropower

150

mA

Low-Noise

Low-Dropout

Regulator

in

SOT-23

and

micro

SMD

packages

for

Applications

with

Output

Voltages

≤

2.3V

May2004

LP2985LV

Micropower150mALow-NoiseLow-DropoutRegulator

inSOT-23andmicroSMDpackagesforApplications

withOutputVoltages≤2.3V

DesignedforUsewithVeryLowESROutputCapacitors

GeneralDescription

TheLP2985LVisa150mA,fixed-outputvoltageregulator

designedtoprovidehighperformanceandlownoiseinap-

plicationsrequiringoutputvoltages

<

2.3V.

UsinganoptimizedVIP

™

(VerticallyIntegratedPNP)pro-

cess,theLP2985LVdeliversunequalledperformanceinall

specificationscriticaltobattery-powereddesigns:

GroundPinCurrent:Typically825µA

@

150mAload,and

75µA

@

1mAload.

EnhancedStability:TheLP2985LVisstablewithoutput

capacitorESRaslowas5mΩ,whichallowstheuseof

ceramiccapacitorsontheoutput.

SleepMode:Lessthan1µAquiescentcurrentwhenON/

OFFpinispulledlow.

SmallestPossibleSize:microSMDpackageusesabsolute

minimumboardspace.

PrecisionOutput:1%toleranceoutputvoltagesavailable

(Agrade).

LowNoise:Byaddinga10nFbypasscapacitor,output

noisecanbereducedto30µV(typical).

Features

n

n

n

n

n

n

n

n

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n

n

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n

Guaranteed150mAoutputcurrent

Smallestpossiblesize(microSMD)

Requiresminimumexternalcomponents

Stablewithlow-ESRoutputcapacitor

<

1µAquiescentcurrentwhenshutdown

Lowgroundpincurrentatallloads

Outputvoltageaccuracy1%(AGrade)

Highpeakcurrentcapability

Widesupplyvoltagerange(16Vmax)

LowZ

OUT

:0.3Ωtypical(10Hzto1MHz)

Overtemperature/overcurrentprotection

−40˚Cto+125˚Cjunctiontemperaturerange

Customvoltagesavailable

Applications

n

n

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CellularPhone

Palmtop/LaptopComputer

PersonalDigitalAssistant(PDA)

Camcorder,PersonalStereo,Camera

BlockDiagram

10129501

VIP

™

isatrademarkofNationalSemiconductorCorporation.

©

元器件交易网

L

P

2

9

8

5

L

V

BasicApplicationCircuit

10129502

*ON/

IN

ifthisfunctionisnottobeused.

**Minimumcapacitanceisshowntoensurestability(maybeincreasedwithoutlimit).Ceramiccapacitorrequiredforoutput(seeApplicationHints).

***Reducesoutputnoise(maybeomittedifapplicationisnotnoisecritical).Useceramicorfilmtypewithverylowleakagecurrent(seeApplicationHints).

ConnectionDiagrams

5-LeadSmallOutlinePackage(M5)microSMD,5BumpPackage(BPA05&BLA05)

10129503

TopView

SeeNSPackageNumberMF05A

FororderinginformationseeTable1

10129523

Note:Theactualphysicalplacementofthepackagemarkingwillvaryfrom

emarkingcontainsdatecodeandlottraceability

information,emarkingdoesnotcorrelate

todevicetype.

TopView

SeeNSPackageNumberBPA05&BLA05

PinDescrption

Name

SOT-23

V

IN

GND

ON/OFF

BYPASS

V

OUT

1

2

3

4

5

PinNumber

microSMD

C3

A1

A3

B2

C1

InputVoltage

CommonGround(devicesubstrate)

Logichighenableinput

Bypasscapacitorforlownoiseoperation

Regulatedoutputvoltage

Function

2