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I

OUT

(A)

EFFICIENCY (%)

0.00.10.20.30.40.50.60.70.80.91.0

0

10

20

30

40

50

60

70

80

90

100

D019

3.3V

2.65V

1.8V

1.2V

LP8728

FB_B1

SW_B1

V

OUT1

FB_B2

SW_B2

V

OUT2

FB_B3

SW_B3

V

OUT3

FB_B4

SW_B4

V

OUT4

1.5 µH

AGND

GND_B1

GND_B2

GND_B3

GND_B4

EN_B1

EN_B2

EN_B3

EN_B4

PG_B1

PG_B2

PG_B3

PG_B4

Micro

Controller

DEFSEL

AVDD

BYP

V

IN

V

IN

VIN_B1

V

IN

VIN_B2

V

IN

V

IN

VIN_B3

VIN_B4

VDDIO

1 µF

1 µF10 µF

1.5 µH

1.5 µH

1.5 µH

10 µF

10 µF

10 µF

10 µF

10 µF

10 µF

10 µF

Product

Folder

Sample &

Buy

Technical

Documents

Tools &

Software

Support &

Community

LP8728C-Q1

SNVSA71–FEBRUARY2015

LP8728C-Q1Quad-OutputStep-DownDC-DCConverter

1Features3Description

TheLP8728C-Q1isaquad-outputPower

1

•LP8728C-Q1isanAutomotiveGradeProductthat

ManagementUnit(PMU),optimizedforlow-power

isAECQ-100Grade1Qualified

FPGAs,microprocessors,andDSPsforautomotive

•FourHighEfficiencyStep-DownDC-DC

applications.Thisdeviceintegratesfourhighly

Converters:

efficientstep-downDC-DCconvertersintoone

package.Eachconverterhashighcurrentcapability

–93%PeakEfficiency(V

IN

=5V,V

OUT

=3.3V)

andseparatecontrolswhichallowsflexibilitytouse

–MaxOutputCurrent1A

thedeviceinmultipleapplications.Alltheconverters

–ForcedPWMOperation

operateabovetheAMbandwithafixed3.2-MHz

–Soft-StartControl

switchingfrequency.Thehigh-sideswitchturn-on

timeofeachconverterisphaseshiftedtominimize

–V

OUT1

=3.3V

inputcurrentspikes.

–V

OUT2

=1.2V

Protectionfeaturesincludeoutputshort-circuit

–V

OUT3

=1.8Vor2.65V(pinselectable)

protection,switchcurrentlimits,inputovervoltage

–V

OUT4

=1.8V

protection,inputundervoltagelockout,andthermal

•SeparateEnableInputsforeachConverter

shutdownfunctions.Duringstart-up,thedevice

controlstheoutputslewratetominimizeoutput

Control

voltageovershootandtheinputinrushcurrent.

•SeparatePowerGoodOutputsforeachConverter

•OutputOvercurrentandInputOvervoltage

DeviceInformation

(1)

Protection

PARTNUMBERPACKAGEBODYSIZE(NOM)

•OvertemperatureProtection

LP8728C-Q1WQFN(28)5.00mmx5.00mm

•UndervoltageLockout(UVLO)

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

2Applications

space

•FPGA,DSPCorePower

space

•ProcessorPowerforMobileDevices

space

•PeripheralI/OPower

space

•AutomotiveSafetyCameras

•AutomotiveInfotainment

space

space

SimplifiedSchematic

Efficiency

1

AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

Produktspecifikationer