Texas Instruments LMZ31503 Bedienungsanleitung

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00.511.522.53

Output Current (A)

Efficiency (%)

V

IN

= PV

IN

= 5 V, V

OUT

= 3.3V, f

SW

= 630 kHz

V

IN

= PV

IN

= 12 V, V

OUT

= 3.3V, f

SW

= 630 kHz

G000

VOUTVIN

LMZ31503

SENSE+

VADJ

AGNDPGND

V

OUT

V

IN

PWRGD

RT/CLK

INH/UVLO

SS/TR

STSEL

C

IN

R

SET

C

OUT

PVIN

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Reference

Design

AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

LMZ31503

SNVS992B–JULY2013–REVISEDAPRIL2018

LMZ315033-APowerModuleWith4.5-Vto14.5-VInput

inQFNPackage

1

1Features

1

•CompleteIntegratedPowerSolutionAllows

SmallFootprint,Low-ProfileDesign

•9mm×15mm×2.8mmpackage

-PinCompatiblewithLMZ31506

•EfficienciesUpTo95%

•Wide-OutputVoltageAdjust

0.8Vto5.5V,with1%ReferenceAccuracy

•OptionalSplitPowerRailAllows

InputVoltageDownto1.6V

•AdjustableSwitchingFrequency

(330kHzto780kHz)

•SynchronizestoanExternalClock

•AdjustableSlow-Start

•OutputVoltageSequencing/Tracking

•PowerGoodOutput

•ProgrammableUndervoltageLockout(UVLO)

•OvercurrentProtection(Hiccup-Mode)

•OverTemperatureProtection

•Pre-biasOutputStart-up

•OperatingTemperatureRange:–40°Cto+85°C

•EnhancedThermalPerformance:13°C/W

•MeetsEN55022ClassBEmissions

-IntegratedShieldedInductor

•CreateaCustomDesignUsingtheLMZ31503

WiththeWEBENCH

®

PowerDesigner

2Applications

•Broadband&CommunicationsInfrastructure

•AutomatedTestandMedicalEquipment

•CompactPCI/PCIExpress/PXIExpress

•DSPandFPGAPointofLoadApplications

•HighDensityDistributedPowerSystems

Efficiency

3Description

TheLMZ31503powermoduleisaneasy-to-use

integratedpowersolutionthatcombinesa3-ADC/DC

converterwithpowerMOSFETs,ashieldedinductor,

andpassivesintoalowprofile,QFNpackage.This

totalpowersolutionallowsasfewas3external

componentsandeliminatestheloopcompensation

andmagneticsdesignprocess.

The9×15×2.8mmQFNpackageiseasytosolder

ontoaprintedcircuitboardandallowsacompact

point-of-loaddesignwithupto95%efficiencyand

excellentpowerdissipationwithathermalimpedance

of13°C/Wjunctiontoambient.Thedevicedelivers

thefull3-Aratedoutputcurrentat85°Cambient

temperaturewithoutairflow.

TheLMZ31503offerstheflexibilityandthefeature-

setofadiscretepoint-of-loaddesignandisidealfor

poweringperformanceDSPsandFPGAs.Advanced

packagingtechnologyaffordarobustandreliable

powersolutioncompatiblewithstandardQFN

mountingandtestingtechniques.

SimplifiedSchematic

Produktspezifikationen