Texas Instruments LM34910C Handleiding

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BST

I

SEN

S

GND

RTN

R

ON

/SD

SS

FB

SW

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10

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V

CC

V

IN

LM34910C

www.ti.com

SNVS517B–MAY2007–REVISEDMARCH2013

LM34910CHighVoltage(50V,1.25A)StepDownSwitchingRegulator

CheckforSamples:LM34910C

1

FEATURES

DESCRIPTION

TheLM34910CStepDownSwitchingRegulator

2

•Integrated55V,N-ChannelBuckSwitch

featuresallofthefunctionsneededtoimplementa

•IntegratedStart-UpRegulator

lowcost,efficient,buckbiasregulatorcapableof

•InputVoltageRange:8Vto50V

supplying1.25Atotheload.Thisbuckregulator

containsa55VN-ChannelBuckSwitch,andis

•NoLoopCompensationRequired

availableinthethermallyenhancedWSON-10

•Ultra-FastTransientResponse

package.Thehystereticregulationschemerequires

•OperatingFrequencyRemainsConstantwith

noloopcompensation,resultsinfastloadtransient

LoadCurrentandInputVoltage

response,andsimplifiescircuitimplementation.The

operatingfrequencyremainsconstantwithlineand

•MaximumDutyCycleLimitedDuringStart-Up

loadvariationsduetotheinverserelationship

•AdjustableOutputVoltage

betweentheinputvoltageandtheon-time.The

•ValleyCurrentLimitAt1.25A

currentlimitdetectionissetat1.25A.Additional

featuresinclude:VCCunder-voltagelockout,thermal

•PrecisionInternalReference

shutdown,gatedriveunder-voltagelockout,and

•LowBiasCurrent

maximumdutycyclelimiter.

•HighlyEfficientOperation

•ThermalShutdown

Package

•WSON-10(4mmx4mm)

TYPICALAPPLICATIONS

•ExposedThermalPadForImprovedHeat

Dissipation

•HighEfficiencyPoint-Of-Load(POL)Regulator

•Non-IsolatedTelecommunicationBuck

Regulator

•SecondaryHighVoltagePostRegulator

ConnectionDiagram

10-LeadWSON

1

Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof

TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

2Alltrademarksarethepropertyoftheirrespectiveowners.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2007–2013,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Product specificaties