Texas Instruments LM25575 Handleiding

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AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

LM25575

SNVS479H–JANUARY2007–REVISEDAUGUST2017

LM2557542-V,1.5-AStep-DownSwitchingRegulator

1

1Features

1

•Integrated42-V,330-mΩN-ChannelMOSFET

•Ultra-WideInputVoltageRangeFrom6Vto42V

•AdjustableOutputVoltageasLowas1.225V

•1.5%FeedbackReferenceAccuracy

•OperatingFrequencyAdjustableBetween50kHz

and1MHzWithSingleResistor

•MasterorSlaveFrequencySynchronization

•AdjustableSoft-Start

•EmulatedCurrentModeControlArchitecture

•WideBandwidthErrorAmplifier

•Built-InProtection

•HTSSOP-16EP(ExposedPad)

•CreateaCustomDesignUsingtheLM25575With

theWEBENCH

®

PowerDesigner

2Applications

•Industrial

3Description

TheLM25575isaneasytousebuckregulatorwhich

allowsdesignengineerstodesignandoptimizea

robustpowersupplyusingaminimumsetof

components.Operatingwithaninputvoltagerangeof

6Vto42V,theLM25575delivers1.5-Aof

continuousoutputcurrentwithanintegrated330-mΩ

N-ChannelMOSFET.Theregulatorutilizesan

EmulatedCurrentModearchitecturewhichprovides

inherentlineregulation,tightloadtransientresponse,

andeaseofloopcompensationwithouttheusual

limitationoflow-dutycyclesassociatedwithcurrent

moderegulators.Theoperatingfrequencyis

adjustablefrom50-kHzto1-MHztoallow

optimizationofsizeandefficiency.ToreduceEMI,a

frequencysynchronizationpinallowsmultipleIC’s

fromtheLM(2)557xfamilytoself-synchronizeorto

synchronizetoanexternalclock.TheLM25575

ensuresrobustnesswithcycle-by-cyclecurrentlimit,

short-circuitprotection,thermalshut-down,and

remoteshut-down.Thedeviceisavailableinapower

enhancedHTSSOP-16packagefeaturingan

exposeddieattachpadforthermaldissipation.The

LM25575issupportedbythefullsuiteof

WEBENCH

®

On-Linedesigntools.

DeviceInformation

(1)

PARTNUMBERPACKAGEBODYSIZE(NOM)

LM25575HTSSOP(16)5.00mm×4.40mm

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

SimplifiedApplicationSchematic

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