Texas Instruments LP8720 Bruksanvisning

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LDO1

1 µF

1.2V-3.3V

@300 mA

VIN1

VIN2

1 µF

1.2V-3.3V

@300 mA

V

DD

1.2V-3.3V

@300 mA

1 µF

LDO3

1 µF

0.8V-2.85V

@300 mA

LDO4

LDO5

1 µF

1.2V-3.3V

@300 mA

LDO2

A-type

LDO1

D-type

LDO3

A-type

LDO4

LO-type

LDO5

D-type

VBATT

V

BATT

2.2 µF2.2 µF

-+

LP8720

Voltage

Reference

Thermal

Shutdown

2.2 µF

LDO2

0.8V...2.3V

@400mA

Buck

10 µF

2.2 µH

SW

FB

GNDB

VINB

10 µF

V

BATT

10k1.5k1.5k

V

SI

SDA

IRQ_N

SCL

EN

DVS

Serial Interface

and

Control

V

BATT

DEFSEL

V

BATT

IDSEL

GND

LP8720

www.ti.com

SNVS575B–JULY2008–REVISEDMAY2013

LP8720OneStep-DownDC-DCandFiveLinearRegulatorswithI

2

C-CompatibleInterface

CheckforSamples:LP8720

1

FEATURES

APPLICATIONS

2

•5LowNoiseLDO’sforupto300mA

•CellularHandsets

•OneHigh-EfficiencySynchronousMagnetic•PortableHand-HeldProducts

BuckRegulator,I

OUT

400mA

DESCRIPTION

–HighEfficiencyPFMMode@LowI

OUT

TheLP8720isamulti-function,programmablePower

–AutoModePFM/PWMSwitch

ManagementUnit,optimizedforsubblockpower

–LowInductance2.2µH@2MHzClock

requirementsolutions.Thisdeviceintegratesone

–DynamicVoltageScaleControl

highlyefficient400mAstep-downDC-DCconverter

withDynamicVoltageScale(DVS),fivelow-noiselow

•I

2

C-CompatibleInterfacefortheControllingof

dropout(LDO)voltageregulators,anda400KHzI

2

C-

InternalRegisters

compatibleinterfacetoallowahostcontrolleraccess

•20-Bump2.5x2.0mmDSBGAPackage

totheinternalcontrolregistersoftheLP8720.

Additionally,theLP8720featuresprogrammable

KEYSPECIFICATIONS

power-onsequencing.

•ProgrammableV

OUT

from0.8Vto2.3VonDC-

LDOregulatorsprovidehighPSRRandlownoise

DC

ideallysuitedforsupplyingpowertobothanalogand

digitalloads.Thepackagewillbethesmallest2.5

•AutomaticSoftStartonDC-DC

mmx2.0mm20-bumpDSBGApackage.

•200mVTypDropoutVoltageat300mAon

LDO’s

•2%(Typ)OutputVoltageAccuracyonLDO’s

TypicalApplicationDiagram

1

Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof

TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

2Alltrademarksarethepropertyoftheirrespectiveowners.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2008–2013,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Produktspecifikationer