矽力杰 Silergy SY81012 同步降压转换器 规格书 Datasheet 佰祥电子

SY81012

HighEfficiency,16V/12ASynchronousStepDownRegulator

GeneralDescriptionFeatures

TheSY81012developsahighefficiencyWideInputVoltageRange:

synchronousstep-downDC/DCregulatorcapableof.3.6Vto16VifVCCisSuppliedbyInternalLDO

delivering12Acurrent.Thedeviceintegrateshigh-.2.7Vto16VifVCCisSuppliedbyExternal

sidepowerswitchandlow-sidesynchronousrectifier3.3VDCSource

withverylowRDS(ON)tominimizetheconduction

LowRDS(ON)forInternalSwitches(Top/Bottom):

loss.Itprovidesaccurateregulationforavarietyof

12.6mΩ/4.3mΩ

loadswithanaccurate±1%voltagereference(V)

REF0.6V±1%VoltageReferenceOverTemperature

overTJ=-40°Cto125°C.

Range(TJ=-40°Cto125°C)

TheSY81012operatesoverawideinputvoltageAdoptConstant-on-timeArchitectureand

rangefrom2.7Vto16V.TheDC/DCregulatorFrequencyLockLoop

adoptstheinstantPWMarchitecturetoachievefastInstantPWMArchitecturetoAchieveFast

transientresponsesforhighstepdownapplications.TransientResponse.

Cycle-by-cyclecurrentlimit,hiccupovercurrent600kHz,800kHzand1000kHzSwitching

protectionandthermalshutdownprotectthedeviceFrequencyOperationSelectedbyMODEPin

duringanovercurrentconditionPFM/FCCMLightLoadOperationMode

SelectedbyMODEpin.

OrderingInformationProgrammableBottomValleyLimitbyILMTpin

ReliableProtectionMode:Auto-RecoveryMode

SY81012□(□□)□

forUVP,UVLO,OTPandOVP

TemperatureCode

Cycle-by-cycleValleyCurrentLimitandPeak

PackageCode

OptionalSpecCodeCurrentLimit

Cycle-by-cycleReverseCurrentLimit

OrderingNumberPackagetypeNote

InternalSoft-startLimitstheInrushCurrent

SY81012VDCQFN3×4-19

ProgrammableSoft-startTimebySSPin

ApplicationsSmoothSoft-startwithOutputPre-biasedFunction

AdjustableInputVoltageUVLObyENPin

PowerModulePowerGoodIndicator

TelecomandNetworkingSystemsDifferentialOutputVoltageRemoteSense

Servers

OutputDischargeFunction

LCD-TV/Net-TV/3DTVRoHSCompliantandHalogenFree

SetTopBox

CompactPackage:QFN3×4-19

Notebook

HighPowerAP

TypicalApplication

Efficiencyvs.LoadCurrent

CBS=0.1μF

(fSW=600kHz,FCCM,L=0.47μH/PCMB104T-R47MS)

100

90VIN=3.6V,VOUT=1.2V

VIN=2.7V~16VL=0.47μH

BSVOUT=1.2VVIN=7.4V,VOUT=1.2V

LX80

INVIN=12V,VOUT=1.2V

RFF=1kΩCFF=220pFVSENSE+

C=10μF×2VIN=16V,VOUT=1.2V

IN)70

%

(

RPG=10kΩC=22μF×260

PGFBSOUTy

Loadc

R1=100kΩn50

e

R=100kΩi

2c

ExternalVCCVi

SENSE-f40

VCCf

Supply(opt.)GNDS

E

30

ON/

CVCC=1μFEN

OFFMODE20

LIMTSS10

RMODE=0Ω

GNDAGND0

RILMT=4.5kΩ0.0010.010.1110

CSS=200nF

LoadCurrent(A)

Figure1.TypicalApplicationCircuitFigure2.Efficiencyvs.LoadCurrent

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SY81012

Pinout(topview)

BSLXVCC

191716

AGND1

IN

ILMT215GND

MODE31814GND

SS413GND

GNDS512GND

FBS611GND

EN710GND

89

PGIN

(QFN3×4-19)

TopMark:DAYxyz(Devicecode:DAY,x=yearcode,y=weekcode,z=lotnumbercode)

Pin

PinNoPinDescription

Name

1AGNDAnalogground.

BottomMOSFETcurrentlimitsetpin.ConnectaresistortoAGNDtosettheinductor

2ILMT

valleycurrentlimitvalue.

Operationmodeselection.ProgramMODEtoselectFCCM/PFM,andtheoperating

3MODE

switchingfrequency.

Externalsoft-startVoltagepin.Soft-starttimecanbeadjustedbyaddinganappropriate

4SSexternalcapacitorbetweenthispinandAGNDpin.ICactualsoft-starttimeisdetermined

bytheslowerrampbetweeninternalSSvoltageandexternalSSvoltage.

Remotesensenegativeinput.Connectthispindirectlytothenegativesideofthevoltage

5GNDS

sensepoint.ShorttoGNDifremotesenseisnotused.

6FBSRemotesensepositiveinput.Connecttothecenterpointofresistordivider.

Enablepin.Pulllowtodisablethedeviceandpullhightoenablethedevice.Canbeused

7ENtosettheinputvoltageonandoffthreshold(adjustUVLO)byusingtwoadditional

resistors.Donotleavethispinfloating.

PowergoodIndicator.Opendrainoutputwhentheoutputvoltageiswithin93.5%to

8PG

120%ofregulationpoint.

9,18INInputpin.DecouplethispintoGNDpinwithatleasta20μFceramiccapacitor.

10,11,12,

GNDPowerGND.

13,14,15

Internal3.3VLDOoutput.Powersupplyforinternalanalogcircuitsanddrivingcircuit.

16VCCDecouplethispintoGNDwithatleastone1μFceramiccapacitor.MakeoneKelvin

connectionfromVCCcapacitornegativeplatetotheAGNDpin.

17LXInductorpin.Connectthispintotheswitchingnodeofinductor.

Boot-strappin.Supplyhighsidegatedriver.Connecta0.1µFceramiccapacitorbetween

19BS

theBSandtheLXpin.

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SY81012

BlockDiagram

PGVCCENIN

FAULTInternal

VCCLDO

PGDetectVCCInput

VUVLOUVLO

FBBandGapHS_ILMT

FAULT

HSFET

VPGTopCurrent

READYLimitCurrent

Sense

VREFVCC

EAThermalBS

VProtection

SS,ACTHSON

MinOFFHS_ONHSHS

Soft-

SSTimeDriveFET

Start

PWM

VFBComparatorLX

FBS

SQLogicLSFET

DIFFMinONControl

VINHCONCurrent

GNDSTimeRVCC

VRAMPR_ILMSense

RampOn-Time

LS

GeneratorGeneratorLSDischarge

FET

LS_ONDriveFET

FSWHS_ILMT

MODEFrequencyPLLGND

SelectVCC

LS_ILMTZCD

PFM/FCCM

MODEDIS_ONDischarge

SelectDrive

BottomCurrentLimit

&ZCD/Reverse

CurrentLimitCircuit

UVPDetect

VUVP

ILMT

ShortCircuit

VFBUVP

Protection

OVPDetect

OVP

AGND

VOVP

Figure3.BlockDiagram

AbsoluteMaximumRatings(Note1)

SupplyInputVoltage--------------------------------------------------------------------------------------------------0.3Vto18V

ILMT,EN,MODE,SS,LXVoltage--------------------------------------------------------------------------0.3VtoVIN+0.3V

DynamicLXVoltagein25nsDuration------------------------------------------------------------------GND-5VtoVIN+5V

BS-------------------------------------------------------------------------------------------------------------VLX-0.3VtoVLX+4V

FBS,GNDS,AGND,VCC,PGVoltage-----------------------------------------------------------------------------0.3Vto4V

MaximumPowerDissipation,PD,MAX@TA=25°C,QFN3×4-19--------------------------------------------------4W

PackageThermalResistance(Note2)

θJA----------------------------------------------------------------------------------------------------------------------------25°C/W

θJC----------------------------------------------------------------------------------------------------------------------------5°C/W

JunctionTemperatureRange--------------------------------------------------------------------------------------40°Cto150°C

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

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

RecommendedOperatingConditions(Note3)

SupplyInputVoltage--------------------------------------------------------------------------------------------------2.7Vto16V

OutputVoltage--------------------------------------------------------------------------------------------------------0.6Vto5.5V

VCCBiasExternalVoltage----------------------------------------------------------------------------------------3.12Vto3.6V

ENSupplyVoltage-------------------------------------------------------------------------------------------------------0VtoVIN

MaximumOutputCurrent------------------------------------------------------------------------------------------------------12A

MaximumOutputCurrentLimit----------------------------------------------------------------------------------------------14A

MaximumInductorPeakCurrent---------------------------------------------------------------------------------------------17A

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

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SY81012

ElectricalCharacteristics

(VIN=12V,TJ=-40°Cto+125°C.TypicalvaluesareatTJ=25°C,unlessotherwisespecified.Thevaluesare

guaranteedbytest,designorstatisticalcorrelation)

ParameterSymbolTestConditionsMinTypMaxUnit

InputVoltageRangeV2.716V

IN

OutputVoltageRangeV0.65.5V

OUT

InputUVLORising

V2.522.62.68V

ThresholdIN,UVLO

InputUVLOHysteresisV200mV

IN,HYS

VCCUVLORising

V2.5V

ThresholdVCC,UVLO

VCCUVLOHysteresisV100mV

VCC,HYS

VCCRegulatorOutput

VI=0mA3.13.253.4V

VoltageCCVCC

VCCLoadRegulationVI=25mA1.8%V

CC,REGVCCCC

V=2V,V=0.65V,PFMmode,

QuiescentCurrentIENFBS650850µA

QNoSwitching

ShutdownCurrentIV=0V,T=25°C35µA

SHDNENJ

FeedbackReference

V-40°C<T<125°C0.5940.6000.606V

VoltageREFJ

ErrorAmplifierOffsetVOS(Note4)-33mV

FBSInputCurrentIFBSVEN=2V,VFBS=1V-50050nA

SSChargingCurrentIV=0V42µA

SS1SS

SSPullDownCurrentISS2VSS=1V34mA

MinimumSoft-Start

tC=1nF(Note4)1ms

TimeSS,MINSS

TopFETRRV=3.3V,T=25°C12.618.9mΩ

DS(ON)DS(ON)1BS-LXJ

BottomFETRRV=3.3V,T=25°C4.36.5mΩ

DS(ON)DS(ON)2CCJ

ENRisingThresholdV1.161.211.26V

EN,R

ENThresholdHysteresisV0.23V

EN,HYS

ENInputCurrentIV=2V0µA

ENEN

DischargeFET

R60Ω

ResistanceDIS

TopFETCurrentLimitILMT,TOP1415.517A

BottomFETReverse

I3.54.56.6A

CurrentLimitLMT,RVS

ReverseCurrentLimit

t(Note4)4060ns

BlankTimeRCL,BLK

ILMTPinOutputVoltageV0.770.80.83V

ILMT

IILMTtoILMT,BOTRatioIILMT/ILMT,BOTILMT,BOT>5A1213.314.6µA/A

OutputOVPThresholdV110120130%V

OVPREF

OutputUVPThresholdV455055%V

UVPREF

OutputUVPDelayt(Note4)20µs

UVP,DLY

UVP/OCPHiccupON

tC=1nF(Note4)3ms

TimeHICCUP,ONSS

UVP/OCPHiccupOFF

tC=1nF(Note4)15ms

TimeHICCUP,OFFSS

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SY81012

VFBSfalling,PGhightolow767982.5%VREF

VFBSrising,PGlowtohigh8893.597%VREF

PowerGoodThresholdVPG

VFBSrising,PGhightolow110120130%VREF

VFBSfalling,PGlowtohigh100103.5107.5%VREF

PowerGoodLeakage

IPGvoltageis3.3V35µA

CurrentPG,LKG

tPG,RVFBSfalling,PGlowtohigh(Note4)0.8ms

PowerGoodDelay

tPG,FVFBSrising,PGhightolow(Note4)20µs

PowerGoodSinkCurrent

VV=2V,V=0V,I=10mA0.4V

CapabilityPG,LOWENFBSPG

V=0V,PullPGto3.3Vthrough

IN550750mV

PowerGoodOutputLow100kΩResistor

V

VoltagePG,LV=0V,PullPGto3.3Vthrough

IN660850mV

10kΩResistor

MinONTimetI=3A(Note4)55ns

ON,MINOUT

MinOFFTimetI=3A(Note4)150ns

OFF,MINOUT

R=0Ω,I=0A,FCCM,

MODEOUT500600700kHz

VOUT=1V,TJ=25°C

RMODE=30.1kΩ,IOUT=0A,FCCM,

SwitchingFrequencyfSW710800890kHz

VOUT=1V,TJ=25°C

R=60.4kΩ,I=0A,FCCM,

MODEOUT90010001100kHz

VOUT=1V,TJ=25°C

ThermalShutdown

TTrising(Note4)140160˚C

TemperatureSDJ

ThermalShutdown

T(Note4)30˚C

HysteresisHYS

Note1:Stressesbeyondthe“AbsoluteMaximumRatings”maycausepermanentdamagetothedevice.Theseare

stressratingsonly.Functionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedinthe

operationalsectionsofthespecificationisnotimplied.Exposuretoabsolutemaximumratingconditionsfor

extendedperiodsmayaffectdevicereliability.

Note2:PackagethermalresistanceismeasuredinthenaturalconvectionatTA=25˚Cona8.5cm×8.5cmsizefour-

layerSilergyEvaluationBoard.

Note3:Thedeviceisnotguaranteedtofunctionoutsideitsoperatingconditions.

Note4:Guaranteedbydesign.

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SY81012