矽力杰 Silergy SA26066 同步降压转换器 规格书 Datasheet 佰祥电子

SA26066

High-Efficiency,7V/6A

SynchronousStep-DownRegulator

GeneralDescriptionFeatures

TheSA26066isahigh-efficiencysynchronousstep-down3Vto7VInputVoltageRange

DC/DCregulatorfeaturinginternalpowerandUpto6AOutputCurrent

synchronousrectifierswitchescapableofdelivering6Aof±1%ReferenceVoltageover-40°Cto+125°C

continuousoutputcurrentoveraninputvoltagerangeJunctionTemperatureRange

from3Vto7V.Internal22.1mΩPowerSwitchand8.1mΩ

SynchronousRectifier

Silergy’sproprietaryInstant-PWM™fast-response,Instant-PWM™ProvidesFastTransientResponse

constant-on-time(COT)controlmethodsupportshigh660kHz,1100kHz,and2200kHzOperating

input/outputvoltageratios(lowdutycycles)andrespondsFrequency

toloadtransientswithinapproximately100ns,whileSelectablePFM/FCCMOperation

maintaininganear-constantoperatingfrequencyoverline,ProgrammableValleyCurrentLimit

load,andoutputvoltageranges.ThiscontrolmethodCycle-by-CycleValleyandPeakCurrentLimit(OCP)

providesstableoperationwithoutcomplexcompensation,andReverseCurrentLimitifFCCMisSelected

evenwithlow-ESRceramiccapacitors.AutomaticRecoveryforOutputOvervoltage(OVP),

OutputUndervoltage(UVP),andOvertemperature

Internal22.1mΩpowerand8.1mΩsynchronousrectifier(OTP)

switchesprovideexcellentefficiencyoverawiderangeofHiccupModeafter32ConsecutiveCyclesofValley

applications,especiallyforlowoutputvoltagesandlowCurrent-LimitProtection

dutycycles.Cycle-by-cyclecurrentlimit,inputPre-BiasedStartup

undervoltagelock-out,internalsoft-start,outputPower-GoodIndicator

undervoltage/overvoltageprotection,andthermalRoHS-CompliantandHalogen-Free

shutdownprovidesafeoperationinalloperatingCompactPackage:QFN2mmx3mm-14

conditions.AEC-Q100QualifiedforAutomotiveApplications

TheSA26066isavailableinacompactQFN2mmx3mm-Applications

14package.

TelecomandNetworkingSystems

Servers

High-PowerAP

Automotive

TypicalApplication

CBSEfficiencyvsOutputCurrent

(fsw=1100kHz,FCCM,L=0.47μH/SPM6530T-R47M170)

100

L

VINBSVOUT90

INLX

80

RHCFF

CINCOUT70

RPG

PGFB(%)60

50

RL

VCC

MODE40

EfficiencyEfficiency

ON/30

CVCC

ENSSRV=3V,V=1.8V

OFFMODE20INOUT

VIN=5V,VOUT=1.8V

ILMTCSS

10VIN=7V,VOUT=1.8V

GNDAGND

RILMT0

0.0010.010.116

OutputCurrent(A)

Figure1.ApplicationCircuitFigure2.Efficiencyvs.LoadCurrent

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SA26066

OrderingInformationPinout(topview)

OrderingGNDVCC

PackageTypeTopMark

PartNumber1413

QFN23-14

SA26066WYQRoHS-CompliantandGMExyzGND112MODE

Halogen-Free

x=yearcode,y=weekcode,z=lotnumbercodeLX211LX

IN310BS

ILMT49PG

EN58SS

67

FBAGND

PinDescription

PinNoPinNamePinDescription

1,14GNDPowerGND.

2,11LXInductorpin.Connectthispintotheswitchingnodeoftheinductor.

3INInputpin.DecouplethispintotheGNDpinwithatleasta30μFceramiccapacitor.

Synchronousrectifiercurrent-limitsetting.ConnectaresistortoAGNDtosettheinductorvalley

4ILMT

current-limitvalue.

Enableinput.Pulllowtodisablethedeviceandpullhightoenablethedevice.Donotleavethis

5EN

pinfloating.Maybeusedforincreasingstartupvoltageorsequencing.

Feedbacksense.Connectthispintothecenterpointoftheoutputresistor-dividertoprogram

6FB

theoutputvoltage.

7AGNDAnalogground.

Externalsoft-startsetting.Optionallyadjustthesoft-starttimebyaddinganappropriateexternal

8SS

capacitorbetweenthispinandtheAGNDpin.

Power-goodindicator.Open-drainoutputwhentheoutputvoltageiswithin92.5%to116.5%of

9PG

theregulationsetpoint.

Bootstrapsupplyforthehigh-sidegatedriver.Connecta0.1µFceramiccapacitorbetweenthe

10BS

BSandtheLXpin.

Operationmodeselection.ProgramMODEtoselectFCCM/PFMandtheoperatingswitching

12MODE

frequency.

Internal3VLDOoutput.Powersupplyforinternalanalogcircuitsandthedrivingcircuit.

13VCCDecouplethispintoAGNDwithatleastone1μFceramiccapacitor.Useshort,direct

connectionsandavoidtheuseofvias.

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SA26066

BlockDiagram

IN

VCCInput

3VLDO

VCCUVLOUVLO

CurrentSense

VCC

ENBootstrap

MODECharge

BS

ILMT

PG

OTPPWMLX

Control&

ProtectionCurrentSense

OVP

LogicVCC

UVP

FB

GND

Discharge

Soft-AGND

SSStart

Figure3.BlockDiagram

AbsoluteMaximumRatings

Parameter(Note1)MinMaxUnit

IN-0.310

LX-0.3VIN+0.3

LX,25nsDurationGND-5VIN+5V

BSVLX-0.3VLX+4

FB,AGND,VCC,EN,PG,MODE,SS,ILMT-0.34

JunctionTemperature,Operating-40150

LeadTemperature(Soldering,10sec.)260°C

StorageTemperature-65150

ThermalInformation

Parameter(Note2)TypUnit

θJAJunction-to-AmbientThermalResistance35

°C/W

θJCJunction-to-CaseThermalResistance6

PDPowerDissipationTA=25°C2.8W

RecommendedOperatingConditions

Parameter(Note3)MinMaxUnit

IN37V

JunctionTemperature-40125°C

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SA26066

ElectricalCharacteristics

(VIN=5V,TJ=-40°Cto+125°C,typicalvaluesareatTJ=25°C,unlessotherwisespecified(Note4))

ParameterSymbolTestConditionsMinTypMaxUnit

VoltageRangeVIN37V

UVLO,RisingVIN,UVLO2.252.552.85V

VCC=3V

UVLO,HysteresisVIN,HYS500mV

Input

ShutdownCurrentISHDNVEN=0V,TJ=25°C410µA

VEN=2V,VFB=0.62V,

QuiescentCurrentIQ8501250µA

PFMmode,noSwitching

UVLO,RisingVVCC,UVLO_RISE2.62.82.95V

UVLO,FallingVVCC,UVLO_FALL2.32.52.7V

VCC

OutputVoltageVCCIVCC=0mA2.8833.12V

LoadRegulationVCC,REGIVCC=25mA0.8%VCC

ReferenceVoltageVREF0.5940.60.606V

FB

InputCurrentIFBVEN=2V,VFB=1V-50050nA

On-ResistanceRDS(ON)HSVBS-LX=3V,TJ=25°C22.126mΩ

PowerSwitchLeakageIHS,LKGVEN=0V,VLX=0V0.0110µA

CurrentLimitILMT,HS11A

On-ResistanceRDS(ON)LSVCC=3V,TJ=25°C8.110mΩ

SynchronousLeakageILS,LKGVEN=0V,VLX=5V0.0430µA

RectifierReverseCurrentILMT,RVS4A

ForwardCurrentILMT,BOTRILMT=0kΩ7.5A

ILMTPinOutputVoltageVILMT1.151.21.25V

ILMTRatioIILMT/ILMT,BOTILMT,BOT>2A364044µA/A

DischargeFETResistanceRDIS125Ω

RisingThresholdVEN,R1.171.221.27V

Enable(EN)ThresholdHysteresisVEN,HYS0.2V

InputCurrentIENVEN=2V0µA

ChargingCurrentISS1VSS=0V15µA

Soft-Start(SS)DischargeCurrentISS2VSS=1V120mA

MinSoft-StartTimetSS,MINCSS=1nF2.2ms

OvervoltageProtectionThresholdVOVP113.5116.5119.5%VREF

UndervoltageThresholdVUVP455055%VREF

ProtectionDelaytUVP,DLY(Note4)20µs

UVP/OCPHiccupOn-TimetHICCUP,ONCSS=1nF(Note4)4ms

UVP/OCPHiccupOff-TimetHICCUP,OFFCSS=1nF(Note4)18ms

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SA26066

ElectricalCharacteristics(cont.)

(VIN=5V,TJ=-40°Cto+125°C,typicalvaluesareatTJ=25°C,unlessotherwisespecified(Note4))

ParameterSymbolTestConditionsMinTypMaxUnit

VFBfalling,PGfromhightolow778083

VFBrising,PGfromlowtohigh89.592.595.5

ThresholdsVPG%VREF

VFBrising,PGfromhightolow113.5116.5119.5

VFBfalling,PGfromlowtohigh102105108

tPG,RPGfromlowtohigh1ms

Power-GoodDelay

tPG,FPGfromhightolow(Note4)20µs

VIN=0V,PullPGto3.3Vthrough

550750

100kΩResistor

OutputLowmV

VIN=0V,PullPGto3.3Vthrough

VPG,LOW660850

Voltage10kΩResistor

VEN=2V,VFB=0V,IPG=10mA0.4V

Leakage

IPG,LKGVPG=3.3V3µA

Current

RMODE=60.4kΩ,IOUT=0A,FCCM,

530660790

VOUT=1V,TJ=25°C

RMODE=0Ω,IOUT=0A,FCCM,

SwitchingFrequencyfSW93511001265kHz

VOUT=1V,TJ=25°C

RMODE=30.1kΩ,IOUT=0A,FCCM,

187022002530

VOUT=1V,TJ=25°C

MinOn-TimetON,MINIOUT=3A(Note4)50ns

MinOff-TimetOFF,MINIOUT=3A(Note4)180ns

ThermalShutdownTemperatureTSD(Note4)160˚C

ThermalShutdownHysteresisTHYS(Note4)20˚C

Note1:Stressesbeyondthe“AbsoluteMaximumRatings”maycausepermanentdamagetothedevice.Thesearestress

ratingsonly.Functionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedintheoperational

sectionsofthespecificationisnotimplied.Exposuretoabsolutemaximumratingconditionsforextendedperiodsmayaffect

devicereliability.

Note2:θJAandθJCaremeasuredinthenaturalconvectionatTA=25˚Cona6cm×6cmsizefour-layerSilergyEvaluation

Board.

Note3:Thedeviceisnotguaranteedtofunctionoutsideitsoperatingconditions.

Note4:Guaranteedbydesign.

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SA26066

TypicalPerformanceCharacteristics

(TA=25℃,VIN=5V,VOUT=1.8V,L=0.47μH,COUT=94μF,fSW=1100kHz,RILMT=4.7kΩ,unlessotherwisenoted)

EfficiencyvsOutputCurrentEfficiencyvsOutputCurrent

(fsw=1100kHz,PFM,L=0.25μH/SPM6530T-R25M23)(fsw=1100kHz,FCCM,L=0.25μH/SPM6530T-R25M23)

100100

9090

8080

7070

(%)

(%)6060

5050

4040

EfficiencyEfficiency

EfficiencyEfficiency

3030

V=3V,V=0.8VV=3V,V=0.8V

20INOUT20INOUT

VIN=5V,VOUT=0.8VVIN=5V,VOUT=0.8V

10VIN=7V,VOUT=0.8V10VIN=7V,VOUT=0.8V

00

0.0010.010.1160.0010.010.116

OutputCurrent(A)OutputCurrent(A)

EfficiencyvsOutputCurrentEfficiencyvsOutputCurrent

(fsw=1100kHz,PFM,L=0.47μH/SPM6530T-R47M170)(fsw=1100kHz,FCCM,L=0.47μH/SPM6530T-R47M170)

100100

9090

8080

7070