Texas Instruments LM43602 Handleiding

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Radiated EMI Emissions (dBµV/m)

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Evaluation Board

EN 55022 Class B Limit

EN 55022 Class A Limit

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C001

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VCC

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SYNC

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ENABLE

SS/TRK

AGND

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LM43602

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VCC

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AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

LM43602

SNVSA36C–APRIL2014–REVISEDOCTOBER2017

LM436023.5-Vto36-V,2-ASynchronousStep-DownVoltageConverter

1

1Features

1

•27-µAQuiescentCurrentinRegulation

•HighEfficiencyatLightLoad(DCMandPFM)

•MeetsEN55022/CISPR22EMIstandards

•IntegratedSynchronousRectification

•AdjustableFrequencyRange:200kHzto2.2MHz

(500kHzDefault)

•FrequencySynchronizationtoExternalClock

•InternalCompensation

•StablewithAlmostAnyCombinationofCeramic,

Polymer,Tantalum,andAluminumCapacitors

•Power-GoodFlag

•Soft-StartintoaPre-BiasedLoad

•InternalSoftStart:4.1ms

•ExtendableSoft-StartTimebyExternalCapacitor

•OutputVoltageTrackingCapability

•PrecisionEnabletoProgramSystemUVLO

•OutputShortCircuitProtectionwithHiccupMode

•OvertemperatureThermalShutdownProtection

•CreateaCustomDesignUsingtheLM43602with

theWEBENCH®PowerDesigner

2Applications

•IndustrialPowerSupplies

•TelecommunicationsSystems

•Sub-AMBandAutomotive

•GeneralPurposeWideV

IN

Regulation

•HighEfficiencyPoint-Of-LoadRegulation

space

3Description

TheLM43602regulatorisaneasy-to-use

synchronousstep-downDC-DCconvertercapableof

drivingupto2Aofloadcurrentfromaninputvoltage

rangingfrom3.5Vto36V(42-Vabsolutemaximum).

TheLM43602providesexceptionalefficiency,output

accuracy,anddropoutvoltageinaverysmallsolution

size.Anextendedfamilyisavailablein0.5-A,1-A,

and3-Aloadcurrentoptionsinpin-to-pincompatible

packages.Peakcurrent-modecontrolisemployedto

achievesimplecontrolloopcompensationandcycle-

by-cyclecurrentlimiting.Optionalfeaturessuchas

programmableswitchingfrequency,synchronization,

power-goodflag,precisionenable,internalsoftstart,

extendablesoftstart,andtrackingprovideaflexible

andeasy-to-useplatformforawiderangeof

applications.Discontinuousconductionandautomatic

frequencymodulationatlightloadsimprovelight-load

efficiency.Thefamilyrequiresfewexternal

componentsandterminalarrangementallowssimple,

optimumPCBlayout.Protectionfeaturesinclude

thermalshutdown,V

CC

undervoltagelockout,cycle-

by-cyclecurrentlimit,andoutputshortcircuit

protection.TheLM43602deviceisavailableina16-

leadHTSSOPpackage(5.1mm×6.6mm×1.2mm)

and16-pinVSONpackagewithwettableflanks.

DeviceInformation

ORDERNUMBERPACKAGEBODYSIZE

LM43602

HTSSOP(16)5.10mm×6.60mm

VSON(16)4.10mm×5.10mm

SimplifiedSchematic

LM43602PWPEVMRadiatedEmissionGraph

12

VIN

to3.3V

OUT

,

F

S

=500kHz,I

OUT

=2A

Product specificaties