矽力杰 Silergy SY81020 2.9-16V 输入 20A 输出多频率可选差分采样高效同步降压稳压器 规格书 (Datasheet)佰祥电子

SY81020

HighEfficiency,16V/20ASynchronousStepDownRegulator

GeneralDescriptionFeatures

TheSY81020isahigh-efficiencysynchronousstep-WideInputVoltageRange:

downDC-DCregulatorfeaturinginternalpowerand.2.9Vto16VifVCCisSuppliedbyExternal

synchronousrectifierswitchescapableofdeliveringSource

20Aofcontinuousoutputcurrentoverawideinput.3.6Vto16VifVCCisSuppliedbyVIN

voltagerange,fromaslowas2.9Vupto16V.TheInternal7.5mΩPowerSwitchand2.4mΩ

outputvoltageisadjustablefrom0.6Vto5.5V.SynchronousRectifier

AccurateFeedbackSetPoint:0.6V±1%

Silergy’sproprietaryInstant-PWM™fast-response,

DifferentialRemoteSense

constant-on-time(COT)PWMcontrolmethod

FastTransientResponse

supportshighinput/outputvoltageratios(lowduty

cycles)andrespondstoloadtransientswithin~100ns600kHz,800kHzand1000kHzOperating

whilemaintaininganear-constantoperatingFrequency

frequencyoverline,loadandoutputvoltageranges.SelectableAutomaticHigh-efficiency

DiscontinuousOperatingModeatLightLoads

Thiscontrolmethodprovidesstableoperation

withoutcomplexcompensation,evenwithlowESRProgrammableValleyCurrentLimit

ceramicoutputcapacitors.ReliableBuilt-inProtections:

.AutomaticRecoveryforInputUnder-

Thestableinternalreference(VREF)provides±1%voltage(UVLO),OutputUnder-voltage

accuracyoverTJ=-40°Cto125°C,andthe(UVP)andOver-temperature(OTP)

differentialinputsenseconfigurationallowstheConditions

feedbacksensingatthemostrelevantloadpoint..Cycle-by-cycleValleyandPeakCurrent

Limit(OCP)

Internal7.5mΩpowerand2.4mΩsynchronous

.Cycle-by-cycleReverseCurrentLimit

rectifierswitchesprovideexcellentefficiencyfora

widerangeofapplications,especiallyforlowoutputInternalandAdjustableSoft-starttoLimitsInrush

voltagesandlowdutycycles.Cycle-by-cyclecurrentCurrent

limit,inputunder-voltagelock-out,internalsoft-start,SmoothPre-biasedStartup

outputunder-andover-voltageprotection,andPowerGoodOutputMonitorforUnder-voltage

thermalshutdownprovidesafeoperationinallandOver-voltage

operatingconditions.

TheSY81020isavailableinacompactQFN3x4Applications

package.

TelecomandNetworkingSystems

Servers

OrderingInformationHighPowerAccessPoints

StorageSystems

SY81020□(□□)□

TemperatureCodeCellularBaseStations

PackageCode

OptionalSpecCode

OrderingNumberPackagetypeNote

SY81020VDCQFN3×4-19

SY81020Rev.0.9SilergyCorp.Confidential-PreparedforCustomerUseOnly1

©2020SilergyCorp.AllRightsReserved.

SY81020

TypicalApplication

Efficiencyvs.LoadCurrent

(fSW=600kHz,FCCM,L=0.22μH/VLBU1007090T-R22L)

100

CBS=0.1μF

90VIN=3.6V,VOUT=1.2V

VIN=7.4V,VOUT=1.2V

L=0.22μH80

VIN=2.9V~16VBSVOUT=1.2VVIN=12V,VOUT=1.2V

INLXVIN=16V,VOUT=1.2V

)70

RFF=1kΩCFF=220pFVSENSE+

+CIN=22μF×2CIN=0.1μF×2%

(

CIN=100μF60

y

RPG=10kΩc

COUT=47μF×5

PGFBSn50

Loade

R1=100kΩi

c

i

f40

R2=100kΩf

VSENSE-

ExternalVCCVCCGNDSE

Supply(opt.)30

ON/

CVCC=1μFEN20

OFFMODE

10

ILMTSS

RMODE=0Ω

GNDAGND0

RILMT=5.6kΩ0.0010.010.111020

CSS=0.22µF

LoadCurrent(A)

Figure1.TypicalApplicationCircuitFigure2.Efficiencyvs.LoadCurrent

Pinout(topview)

BSLXVCC

191716

AGND1

IN

ILMT215GND

MODE31814GND

SS413GND

GNDS512GND

FBS611GND

EN710GND

89

PGIN

(QFN3×4-19)

TopMark:DBAxyz(Devicecode:DBA,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.

SY81020Rev.0.9SilergyCorp.Confidential-PreparedforCustomerUseOnly2

©2020SilergyCorp.AllRightsReserved.

SY81020

PowergoodIndicator.Opendrainoutputwhentheoutputvoltageiswithin92.5%to

8PG

120%ofregulationpoint.

9,18INInputpin.DecouplethispintoGNDpinwithatleasta30μFceramiccapacitor.

10,11,12,

GNDPowerGND.

13,14,15

Internal3.3VLDOoutput.Powersupplyforinternalanalogcircuitsanddrivingcircuits.Decouple

thispintoGNDwithatleasta1μFceramiccapacitor.MakeonegoodKelvinconnectionfrom

16VCC

AGNDtoVCCcapacitorGNDconnection.Useshort,directconnectionsandavoidtheuseofvias.

Maybedrivenbyanexternalbiassupply.SeeDetailedDescription.

17LXInductorpin.Connectthispintotheswitchingnodeofinductor.

Boot-strappin.Supplyhighsidegatedriver.Connecta0.1µFceramiccapacitorbetween

19BS

theBSandtheLXpin.

BlockDiagram

Figure3.BlockDiagram

AbsoluteMaximumRatings(Note1)

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

ILMT,SS---------------------------------------------------------------------------------------------------------------0.3Vto4V

EN,MODE,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--------------------------------------------------4.2W

PackageThermalResistance(Note2)

θJA----------------------------------------------------------------------------------------------------------------------------24°C/W

θJC----------------------------------------------------------------------------------------------------------------------------4.5°C/W

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

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

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

SY81020Rev.0.9SilergyCorp.Confidential-PreparedforCustomerUseOnly3

©2020SilergyCorp.AllRightsReserved.

SY81020

RecommendedOperatingConditions(Note3)

SupplyInputVoltage--------------------------------------------------------------------------------------------------2.9Vto16V

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

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

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

MaximumOutputCurrent------------------------------------------------------------------------------------------------------20A

MaximumOutputCurrentLimit----------------------------------------------------------------------------------------------24A

MaximumInductorPeakCurrent---------------------------------------------------------------------------------------------28A

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

ElectricalCharacteristics

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

guaranteedbytest,designorstatisticalcorrelation)

ParameterSymbolTestConditionsMinTypMaxUnit

InputVoltageRangeV2.916V

IN

OutputVoltageRangeV0.65.5V

OUT

InputUVLORising

V2.62.752.9V

ThresholdIN,UVLO

InputUVLOHysteresisV200mV

IN,HYS

VCCUVLORising

V2.5V

ThresholdVCC,UVLO

VCCUVLOHysteresisV100mV

VCC,HYS

VCCRegulatorOutput

VI=0mA3.153.33.45V

VoltageCCVCC

VCCLoadRegulationVI=25mA1.4%V

CC,REGVCCCC

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

QuiescentCurrentIENFBS550850µA

QNoSwitching

ShutdownCurrentIV=0V,T=25°C25µA

SHDNENJ

FeedbackReference

V-40°C<T<125°C0.5940.6000.606V

VoltageREFJ

ErrorAmplifierOffsetVOS(Note4)-33mV

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

SSChargingCurrentIV=0V46µA

SS1SS

SSPullDownCurrentISS2VSS=1V38mA

MinimumSoft-Start

tC=1nF(Note4)1ms

TimeSS,MINSS

TopFETRRV=3.3V,T=25°C7.511.3mΩ

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

BottomFETRRV=3.3V,T=25°C2.43.6mΩ

DS(ON)DS(ON)2CCJ

TopFETLeakageITOP,LKGVEN=0V,VDS=12V0.018µA

BottomFETLeakageIV=0V,V=12V0.0432µA

BOT,LKGENDS

ENRisingThresholdV1.181.231.28V

EN,R

ENThresholdHysteresisV0.2V

EN,HYS

ENInputCurrentIV=2V0µA

ENEN

DischargeFET

R120Ω

ResistanceDIS

TopFETCurrentLimitILMT,TOP25.52833A

BottomFETReverse

I91316A

CurrentLimitLMT,RVS

SY81020Rev.0.9SilergyCorp.Confidential-PreparedforCustomerUseOnly4

©2020SilergyCorp.AllRightsReserved.

SY81020

ParameterSymbolTestConditionsMinTypMaxUnit

ReverseCurrentLimit

t(Note4)4060ns

BlankTimeRCL,BLK

ILMTPinOutputVoltageV1.151.21.25V

ILMT

IILMTtoILMT,BOTRatioIILMT/ILMT,BOTILMT,BOT>5A91011µA/A

OutputOVPThresholdV110120130%V

OVPREF

OutputUVPThresholdV475257%V

UVPREF

OutputUVPDelayt(Note4)20µs

UVP,DLY

UVP/OCPHiccupON

tC=1nF(Note4)3ms

TimeHICCUP,ONSS

UVP/OCPHiccupOFF

tC=1nF(Note4)12ms

TimeHICCUP,OFFSS

VFBSfalling,PGhightolow778185%VREF

VFBSrising,PGlowtohigh88.592.596.5%VREF

PowerGoodThresholdVPG

VFBSrising,PGhightolow110120130%VREF

VFBSfalling,PGlowtohigh102106110%VREF

PowerGoodLeakage

IPGvoltageis3.3V35µA

CurrentPG,LKG

tPG,RLowtohigh(Note4)0.8ms

PowerGoodDelay

tPG,FHightolow(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)60ns

ON,MINOUT

MinOFFTimetI=3A(Note4)180ns

OFF,MINOUT

R=0Ω,I=0A,FCCM,

MODEOUT510600690kHz

VOUT=1V,TJ=25°C

RMODE=30.1kΩ,IOUT=0A,FCCM,

SwitchingFrequencyfSW690800910kHz

VOUT=1V,TJ=25°C

R=60.4kΩ,I=0A,FCCM,

MODEOUT90010001100kHz

VOUT=1V,TJ=25°C

ThermalShutdown

TTrising(Note4)160˚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.

SY81020Rev.0.9SilergyCorp.Confidential-PreparedforCustomerUseOnly5

©2020SilergyCorp.AllRightsReserved.

SY81020

TypicalPerformanceCharacteristics

(TA=25℃,VIN=12V,VOUT=1.2V,L=0.22μH,COUT=235μF,fSW=600kHz,RILMT=5.6kΩ,CSS=0.22μF,unless

otherwisenoted)

Efficiencyvs.LoadCurrentEfficiencyvs.LoadCurrent

(fSW=600kHz,PFM,L=0.22μH/VLBU1007090T-R22L)(fSW=600kHz,FCCM,L=0.22μH/VLBU1007090T-R22L)

100100

9090VIN=3.6V,VOUT=1.2V

VIN=7.4V,VOUT=1.2V

8080

VIN=12V,VOUT=1.2V

VIN=16V,VOUT=1.2V

)70)70

%

%

(

(

6060

y

y

c

c

n50n50