Texas Instruments LM43600 Handleiding

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EN 55022 Class B Limit

Frequency (MHz)

dBuV

80

70

60

50

40

30

20

10

30

Evaluation Board Emissions

1000100

Vertical Polarization

Horizontal Polarization

SWVIN

PGND

CBOOT

VCC

BIAS

SYNC

RT

ENABLE

SS/TRK

AGND

FB

LM43600

V

IN

C

OUT

C

BOOT

C

IN

C

VCC

V

OUT

C

BIAS

R

FBT

R

FBB

C

FF

L

PGOOD

Product

Folder

Order

Now

Technical

Documents

Tools &

Software

Support &

Community

AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

LM43600

SNVSA43B–AUGUST2014–REVISEDSEPTEMBER2017

LM436003.5-Vto36-V,0.5-ASynchronousStep-DownVoltageConverter

1

1Features

1

•33-µAQuiescentCurrentinRegulation

•HighEfficiencyatLightLoad(DCMandPFM)

•MeetsEN55022/CISPR22EMIstandards

•IntegratedSynchronousRectification

•AdjustableFrequencyRange:200kHzto2.2MHz

(500kHzdefault)

•FrequencySynchronizationtoExternalClock

•InternalCompensation

•StablewithAlmostAnyCombinationofCeramic,

Polymer,Tantalum,andAluminumCapacitors

•Power-GoodFlag

•SoftStartintoPre-BiasedLoad

•InternalSoftStart:4.1ms

•ExtendableSoft-StartTimebyExternalCapacitor

•OutputVoltageTrackingCapability

•PrecisionEnabletoProgramSystemUVLO

•OutputShort-CircuitProtectionwithHiccupMode

•OvertemperatureThermalShutdownProtection

•CreateaCustomDesignUsingtheLM43600With

theWEBENCH

®

PowerDesigner

2Applications

•IndustrialPowerSupplies

•TelecommunicationsSystems

•Sub-AMBandAutomotive

•GeneralPurposeWideV

IN

Regulation

•HighEfficiencyPoint-Of-LoadRegulation

3Description

TheLM43600regulatorisaneasy-to-use

synchronousstep-downDC-DCconvertercapableof

drivingupto0.5Aofloadcurrentfromaninput

voltagerangingfrom3.5Vto36V(42Vtransient).

TheLM43600providesexceptionalefficiency,output

accuracyanddrop-outvoltageinaverysmall

solutionsize.Anextendedfamilyisavailablein1-A,

2-Aand3-Aloadcurrentoptionsinpin-to-pin

compatiblepackages.Peakcurrentmodecontrolis

employedtoachievesimplecontrolloop

compensationandcycle-by-cyclecurrentlimiting.

Optionalfeaturessuchasprogrammableswitching

frequency,synchronization,power-goodflag,

precisionenable,internalsoftstart,extendablesoft

start,andtrackingprovideaflexibleandeasy-to-use

platformforawiderangeofapplications.

Discontinuousconductionandautomaticfrequency

modulationatlightloadsimprovelightloadefficiency.

Thefamilyrequiresfewexternalcomponentsandpin

arrangementallowssimple,optimumPCBlayout.

Protectionfeaturesincludethermalshutdown,V

CC

undervoltagelockout,cycle-by-cyclecurrentlimit,and

outputshort-circuitprotection.TheLM43600deviceis

availableinthe16-pinHTSSOP(PWP)leaded

package(6.6mm×5.1mm×1.2mm)with0.65-mm

leadpitch.Pin-to-pincompatiblewithLM46000,

LM46001,LM46002,LM43601,LM43602,and

LM43603devices.

DeviceInformation

(1)

PARTNUMBERPACKAGEBODYSIZE(NOM)

LM43600HTSSOP(16)6.60mm×5.10mm

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

4SimplifiedSchematic

RadiatedEmissionGraph

withV

IN

=12V,V

OUT

=3.3V,F

SW

=500kHz,I

OUT

=

0.5A

Product specificaties