Texas Instruments LP8758-E0 Bedienungsanleitung

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SW_B0

SW_B1

SW_B2

SW_B3

VIN_B0

VIN_B1

VIN_B2

VIN_B3

VANA

V

IN

FB_B0

FB_B1

V

OUT3

LP8758

FB_B2

FB_B3

NRST

SDA

SCL

nINT

EN1

EN2

GNDs

V

OUT2

V

OUT1

V

OUT0

Output Current (A)

Efficiency (%)

0.0010.010.1155

70

75

80

85

90

95

100

D038

V

IN

= 3.3 V

2.5 V

1.8 V

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Reference

Design

AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

LP8758-E0

SNVSAC6B–JANUARY2016–REVISEDJUNE2018

LP8758-E0Four-OutputSynchronousStep-DownDC-DCConverter

1

1Features

1

•FullyIntegratedQuadBuck,upto4-A

ProgrammableMaximumOutputCurrentPer

Buck

–AutoPWM-PFMandForced-PWMOperations

–ProgrammableOutputVoltageSlewRate

From30mV/µsto0.5mV/µs

–InputVoltageRange:2.5Vto5.5V

–V

OUT

Range:0.5Vto3.36VwithDVS

•ProgrammableStart-UpandShutdown

SequencingWithEnableSignal

•I

2

C-CompatibleInterfaceThatSupportsStandard

(100kHz),Fast(400kHz),

Fast+(1MHz),andHigh-Speed(3.4MHz)Modes

•InterruptFunctionwithProgrammableMasking

•LoadCurrentMeasurement

•OutputShort-CircuitandOverloadProtection

•Spread-SpectrumModeforEMIReduction

•TheFourBuckCoresOperate90°outofPhase

TherebyReducingInputRippleCurrent

•OvertemperatureWarningandProtection

•UndervoltageLockout(UVLO)

2Applications

•SmartPhones,eBooks,andTablets

•NetworkProcessorCards(NPCs),Wirelessand

DSLModems

•SolidStateDrives

•GamingDevices

3Description

TheLP8758-E0deviceisdesignedtomeetpower

managementrequirementsforlow-powerprocessors

inmobilephones,networkcards,andsimilar

applications.Thedevicecontainsfourstep-downDC-

DCconvertercores,providingfouroutputvoltage

rails.ThedeviceiscontrolledbyanI

2

C-compatible

serialinterface.

TheautomaticPWM-PFM(AUTOmode)operation

maximizesefficiencyoverawideoutput-current

range.

TheLP8758-E0supportsprogrammablestart-upand

shutdownsequencingsynchronizedtohardware

Enableinputsignal.

Theprotectionfeaturesincludeshort-circuit

protection,currentlimits,inputsupplyUVLO,and

temperaturewarningandshutdownfunctions.

Severalerrorflagsareprovidedforstatusinformation

ofthedevice.Inaddition,theLP8758-E0device

supportsloadcurrentmeasurementwithoutthe

additionofexternalcurrentsenseresistors.During

start-upandvoltagechange,thedevicecontrolsthe

outputslewratetominimizeoutputvoltageovershoot

andtheinrushcurrent.

Table1.DeviceInformation

(1)

PARTNUMBERDEFAULTOUTPUTVOLTAGE

LP8758-E0

V

OUT0

1000mV

V

OUT1

2500mV

V

OUT2

1200mV

V

OUT3

1800mV

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

SimplifiedSchematicEfficiencyvsOutputCurrent

V

OUT

settings=1.8Vand2.5V

Produktspezifikationen