矽力杰 Silergy SY8832 2.5-5.5V 输入双通道每通道 2A 输出高效同步降压稳压器 规格书 (Datasheet)佰祥电子

SY8832

HighEfficiency2MHz,Dual2A

SynchronousStepDownRegulator

GeneralDescriptionFeatures

TheSY8832isadual-output,highefficiency2MHzInputrange:2.5Vto5.5Vinputvoltage

synchronousstepdownDC-DCregulatorIC,capable2MHzswitchingfrequency

ofdeliveringupto2Aoutputcurrenteachoutput180°outofphaseoperation

channel.TheSY8832operatesoverawideinputOutputcurrent:2Aperchannel

voltagerangefrom2.5Vto5.5VandintegratesmainLowQuiescentCurrent:<45uAforbothchannels

switchandsynchronousswitchwithverylowRDS(ON)

LowRDS(ON)forinternalswitches(PFET/NFET):

tominimizetheconductionloss.125mΩ/100mΩ

Internalsoft-start

OrderingInformation100%dropoutoperation

RoHSCompliantandHalogenFree

SY8832□(□□)□Compactpackage:TSOT23-8

TemperatureCode

PackageCode

OptionalSpecCodeApplications

SSD

OrderingNumberPackagetypeNote

CellPhones

SY8832AICTSOT23-8--

DigitalCameras

PDAs

PortableMediaPlayers

TypicalApplications

Efficiencyvs.OutputCurrent

96

L1

1uH/6.7A94

VIN

INLX1VOUT1

+R192

C2C7C4

C1100k

22pF/50V22uF/6.3V)

100uF/16V10uF/10VGND

FB1%90

(

Ry

2c

49.9kn88

e

SY8832i

c

L2i

f

f86

1uH/6.7A

E

LX2VOUT2V=3.3V,V=1.8V

84INOUT

R5

C8C5VIN=4.2V,VOUT=1.8V

100k

EN222pF/50V22uF/6.3V82VIN=5.0V,VOUT=1.8V

FB2

EN1R680

49.9k1101001000

R4R3

1M1M

OutputCurrent(mA)

Figure1.SchematicDiagramFigure2.Efficiencyvs.OutputCurrent

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SY8832

Pinout(topview)

FB118FB2

IN27EN1

LX136EN2

GND45LX2

TopMark:Rtxyz(Devicecode:Rt;x=yearcode,y=weekcode,z=lotnumbercode)

PinNamePinNumberPinDescription

Feedbackpinforoutput1.Connectthispintothecenterpointoftheoutputresistor

FB11divider(asshowninFigure1)toprogramtheoutput1voltage:

VOUT1=0.6V×(1+RH1/RL1)

IN2Powerinputpin.Decouplethispintogroundpinatleast10uFceramiccap

LX13Inductorpinforoutput1.Connectthispintotheswitchingnodeofinductor.

GND4Groundpin.

LX25Inductorpinforoutput2.Connectthispintotheswitchingnodeofinductor.

EN26Enablepinforoutput2.Donotleaveitfloating.

EN17Enablepinforoutput1.Donotleaveitfloating.

Feedbackpinforoutput2.Connectthispintothecenterpointoftheoutputresistor

FB28divider(asshowninFigure1)toprogramtheoutput2voltage:

VOUT2=0.6V×(1+RH2/RL2)

AbsoluteMaximumRatings(Note1)

InputSupplyVoltage----------------------------------------------------------------------------------------------------0.3Vto6V

FB1,FB2.EN1,EN2Voltage----------------------------------------------------------------------------------0.3VtoIN+0.6V

LX1,LX2Voltage---------------------------------------------------------------------------------------------0.3V（*1）to6V（*2）

PowerDissipation,PD@TA=25°C,TSOT23-8--------------------------------------------------------------------------1.8W

PackageThermalResistance(Note2)

θJA--------------------------------------------------------------------------------------------------------------------55°C/W

JC--------------------------------------------------------------------------------------------------------------------8°C/W

JunctionTemperatureRange------------------------------------------------------------------------------------------------150°C

LeadTemperature(Soldering,10sec.)------------------------------------------------------------------------------------260°C

StorageTemperatureRange---------------------------------------------------------------------------------------65°Cto150°C

(*1)LX1,LX2Voltagetesteddownto-5V<10ns

(*2)LX1,LX2Voltagetestedupto+8V<50ns

RecommendedOperatingConditions(Note3)

SupplyInputVoltage-------------------------------------------------------------------------------------------------2.5Vto5.5V

Enable,FBVoltage------------------------------------------------------------------------------------------------------VIN+0.3V

JunctionTemperatureRange-------------------------------------------------------------------------------------40°Cto125°C

AmbientTemperatureRange--------------------------------------------------------------------------------------40°Cto85°C

SY8832Rev.0.9ASilergyCorp.Confidential-PreparedforCustomerUseOnly2

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SY8832

ElectricalCharacteristics

(VIN=5V,VOUT1=VOUT2=2.5V,L1=L2=1.0uH,COUT1=COUT2=22uF,TA=25°Cunlessotherwisespecified)

ParameterSymbolTestConditionsMinTypMaxUnit

InputVoltageRangeVIN2.55.5V

ShutdownCurrentISHDNEN1=EN2=00.11µA

QuiescentCurrentIQEN1=1orEN2=1,35µA

IOUT1=IOUT2=0,noswitching

EN1=1andEN2=1,45µA

IOUT1=IOUT2=0,noswitching

InputUVLOThresholdVUVLO2.5V

UVLOHysteresisVHYS10.2V

OscillatorFrequencyfOSCIOUT1=0.1A,IOUT2=0.1A2.0MHz

ThermalShutdownTSD150°C

Temperature

ThermalShutdownTHYS20°C

Hysteresis

FeedbackReferenceVREF1,VREF20.5880.6000.612V

Voltage

PFETRONRDS(ON),P1125mΩ

RDS(ON),P2

NFETRONRDS(ON),N1100mΩ

RDS(ON),N2

PFETCurrentLimitILIM1,ILIM12.7A

ENRisingThresholdVENH1,VENH11.2V

ENFallingThresholdVENL1,VENL10.4V

InternalSoftStartTimetSS1,tSS20.5ms

Note1:Stressesbeyondthe“AbsoluteMaximumRatings”maycausepermanentdamagetothedevice.Theseare

forstressratings.Functionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedinthe

operationalsectionsofthespecificationsisnotimplied.Exposuretoabsolutemaximumratingconditionsfor

extendedperiodsmayremainpossibilitytoaffectdevicereliability.

Note2:θJAofSY8832AICismeasuredinthenaturalconvectionatTA=25°Con2OZfour-layerssilergy

evaluationboardofJEDEC51-3thermalmeasurementstandard.PaddleofTSOT23-8packageisthecaseposition

forSY8832AIC.

Note3:Thedeviceisnotguaranteedtofunctionoutsideitsoperatingconditions.

SY8832Rev.0.9ASilergyCorp.Confidential-PreparedforCustomerUseOnly3

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SY8832

TSOT23-8PackageOutlineDrawing

TopviewSideviewA

SideviewBRecommendedPCBlayout

(Referenceonly)

Notes:Alldimensioninmillimeterandexcludemold