矽力杰 Silergy SY8816 2.75-6V 输入 6A 输出高效同步降压稳压器 规格书 (Datasheet)佰祥电子

SY8816

HighEfficiency6V,6A,1.2MHz

SynchronousStepDownRegulator

GeneralDescriptionFeatures

LowRDS(ON)forInternalSwitches(Top/Bottom):

SY8816isahighefficiencyhighfrequency35/15mΩ

synchronousstepdownDC/DCregulatorcapableof2.75-6VInputVoltageRange

deliveringupto6Aoutputcurrent.Itoperatesovera1.2MHzSwitchingFrequencyMinimizesthe

wideinputvoltagerangefrom2.75Vto6V.ItExternalComponents

integratesmainswitchandsynchronousswitchwithInternalSoft-startLimitstheInrushCurrent

verylowRDS(ON)tominimizetheconductionloss.Upto94%Efficiency

HighintegratedsolutionandDFN2x2-8package6AContinuousOutputCurrentCapability

performtheoptimizedBOMcostandreduceexternal

ShutdownModeDraws<0.1μASupplyCurrent

componentpartcount.Lowinputandoutputvoltage

100%DropoutOperation

ripple,smallexternalinductorandcapacitorsizes,

PowerGoodIndicator

smallPCBlayoutspaceareachieved.

OCP/UVLO/OTPProtections

RoHSCompliantandHalogenFree

OrderingInformationCompactPackage:DFN2x2-8

SY8816□(□□)□

TemperatureCodeApplications

PackageCode

OptionalSpecCodeHighDefinitionSetTopBox

OrderingNumberPackagetypeNoteLCDTV

SY8816DFCDFN2x2-8--NotebookPC

TypicalApplications

Efficiencyvs.LoadCurrent

100

RPG:100kΩ

95

L:0.47µH90

VIN:2.75~6.0VPGVOUT:1.8V)

%

INLX(

y85

+c

CeCIN:

C:n

RH:COUT

ff:e

22µF22µF*2i

100kΩc80

SY881622pFi

f

f

ENFBE

75VIN=3.3V,VOUT=1.8V

R:VIN=4.2V,VOUT=1.8V

REN:GNDL

1MΩ49.9kΩ70VIN=5.0V,VOUT=1.8V

65

110100100010000

LoadCurrent(mA)

Figure1.SchematicDiagramFigure2.Efficiencyvs.LoadCurrent

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SY8816

Pinout(topview)

EN18FB

IN27PG

LX36LX

GND45GND

(DFN2x2-8)

TopMark:VWxyzforSY8816DFC(devicecode:VW,x=yearcode,y=weekcode,z=lotnumbercode)

PinNamePinNumberDescription

EN1Enablecontrol.Pullhightoturnon.Donotleaveitfloating.

GND4,5Groundpin.

LX3,6Inductorpin.Connectthispintotheswitchingnodeoftheinductor.

IN2Powerinputpin.

FB8Outputfeedbackpin.Connectthispintothecenterpointoftheoutputresistor

divider(asshowninFigure.1)toprogramtheoutputvoltage:

VOUT=0.6×(1+R1/R2)

PG7Powergoodindicator.Whentheoutputvoltageexceeds90%ofregulation

point,itbecomesopendrain.Lowotherwise.

BlockDiagram

IN

InternalInputUVLO

Power2.7V

CurrentSense

EN

1.2V

PWMControlLX

FB&ProtectLogic

0.6V

InternalSST

GND

PGThermal

Protection

Figure3.BlockDiagram

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SY8816

AbsoluteMaximumRatings(Note1)

IN,LX-----------------------------------------------------------------------------------------------------------------------6.5V

AllOtherPins----------------------------------------------------------------------------------------------------------VIN+0.6V

PowerDissipation,PD@TA=25°CDFN2x2----------------------------------------------------------------------------2W

PackageThermalResistance(Note2)

θJA-----------------------------------------------------------------------------------------------------------62.5°C/W

JC--------------------------------------------------------------------------------------------------------------10°C/W

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

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

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

(*1)LXVoltageTestedDownto-3V<40ns

(*2)LXVoltageTestedUpto+7V<40ns

RecommendedOperatingConditions(Note3)

SupplyInputVoltage---------------------------------------------------------------------------------------------2.75Vto6.0V

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

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

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SY8816

ElectricalCharacteristics

(VIN=5V,VOUT=2.5V,L=0.47μH,COUT=22μFх2,TA=25°C,IOUT=1Aunlessotherwisespecified)

ParameterSymbolTestConditionsMinTypMaxUnit

InputVoltageRangeVIN2.756V

IOUT=0,EN=1,

QuiescentCurrentIQ60µA

FB=105%×VREF

ShutdownCurrentISHDNEN=00.11µA

FeedbackReferenceVoltageVREF0.5910.60.609V

NFETRDS(ON)RDS(ON)N15mΩ

PFETRDS(ON)RDS(ON)P35mΩ

PFETCurrentLimitILIM7.5A

InternalSoft-startTimetSS0.8ms

PGOODUnder-voltageThresholdVFB,LV0.54V

ShortCircuitProtectionThresholdVSCP0.25V

MinONTime60ns

MaxDutyCycle100%

ENRisingThresholdVENH1.2V

ENFallingThresholdVENL0.4V

InputUVLOThresholdVUVLO2.7V

UVLOHysteresisVHYS0.3V

OscillatorFrequencyFOSC1.2MHz

ThermalShutdownTemperatureTSD150°C

ThermalShutdownHysteresisTHYS15°C

LXNodeDischargeResistanceRDISCHG50Ω

Note1:Stressesbeyondthe“AbsoluteMaximumRatings”maycausepermanentdamagetothedevice.Theseare

stressratingsonly.Functionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedinthe

operationalsectionsofthespecificationisnotimplied.Exposuretoabsolutemaximumratingconditionsfor

extendedperiodsmayaffectdevicereliability.

Note2:θJAismeasuredinthenaturalconvectionatTA=25°Con2OZfour-layerSilergyevaluationboardof

JEDEC51-3thermalmeasurementstandard.PaddleofDFN2x2-8packageisthecasepositionforθJCmeasurement.

Note3:Thedeviceisnotguaranteedtofunctionoutsideitsoperatingconditions.

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SY8816

TypicalPerformanceCharacteristics

Efficiencyvs.LoadCurrentEfficiencyvs.LoadCurrent

100100

9595

90

)

)90

%

%

(

(

y

y8585

c

c

n

n

e

e

i

i

c

c80

i

i80

f

f

f

f

E

E

7575VIN=3.3V,VOUT=1.8V

VIN=3.3V,VOUT=1.2V

VIN=4.2V,VOUT=1.8V

VIN=4.2V,VOUT=1.2V

70VIN=5.0V,VOUT=1.8V

70VIN=5.0V,VOUT=1.2V

65

65

110100100010000110100100010000

LoadCurrent(mA)LoadCurrent(mA)

Efficiencyvs.LoadCurrentLoadTransient

(VIN=5V,VOUT=1.8V,IOUT=0.6~6A)

100

95∆VOUT0.2V/div

90

)

%

(

y85

c

n

e

i

c

i80

f

fIL5A/div

E

75

VIN=4.2V,VOUT=3.3V

VIN=5.0V,VOUT=3.3V

70

65

110100100010000

Time(200μs/div)

LoadCurrent(mA)

StartupfromEnableShutdownfromEnable

(VIN=5V,VOUT=1.8V,IOUT=6A)(VIN=5V,VOUT=1.8V,IOUT=6A)

EN5V/divEN5V/div

VOUT2V/divVOUT2V/div

VLX5V/divVLX5V/div

IL5A/divIL5A/div

Time(2ms/div)Time(2ms/div)

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SY8816

ShortCircuitProtectionShortCircuitProtection

(VIN=5V,VOUT=1.8V,0AtoShort)(VIN=5V,VOUT=1.8V,6AtoShort)

VOUT1V/divVOUT1V/div

IL5A/div

IL5A/div

Time(4ms/div)Time(4ms/div)

OutputRipple

(VIN=5V,VOUT=1.8V,IOUT=6A)

∆VOUT10mV/div

VLX2V/div

IL5A/div

Time(1μs/div)

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SY8816

problem,thisceramiccapacitorshouldbeplacedreally

OperationclosetotheINandGNDpins.Careshouldbetakento

minimizetheloopareaformedbytheCIN,and

SY8816isahighefficiencyhighfrequencyIN/GNDpins.

synchronousstepdownDC/DCregulatorcapableof

deliveringupto6Aoutputcurrent.Itoperatesovera

OutputCapacitorCOUT:

wideinputvoltagerangefrom2.75Vto6V.ItTheoutputcapacitorisselectedtohandletheoutput

integratesmainswitchandsynchronousswitchwithripplenoiserequirements.Bothsteadystaterippleand

verylowRDS(ON)tominimizetheconductionloss.transientrequirementsmustbetakenintoconsideration

HighintegratedsolutionandDFN2x2-8packagewhenselectingthiscapacitor.Forthebestperformance,

performtheoptimizedBOMcostandreduceexternalitisrecommendedtouseanX5Rorbettergrade

componentpartcount.Lowinputandoutputvoltageceramiccapacitorwith6.3Vratingandmorethantwo

ripple,smallexternalinductorandcapacitorsizes,22μFcapacitances.

smallPCBlayoutspaceareachieved.

OutputInductorL:

ApplicationsInformationThereareseveralconsiderationsinchoosingthis

inductor.

BecauseofthehighintegrationintheSY8816,the1)Choosetheinductancetoprovidethedesired

applicationcircuitbasedonthisregulatorisratherripplecurrent.Itissuggestedtochoosetheripple

simple.OnlytheinputcapacitorCIN,theoutputcurrenttobeabout40%ofthemaximumoutput

capacitorCOUT,theoutputinductorLandthefeedbackcurrent.Theinductanceiscalculatedas:

resistors(R1andR2)needtobeselectedforthe

targetedapplicationsspecifications.

VOUT(1VOUT/VIN,MAX)

L

FI40%

FeedbackResistorDividersR1andR2:SWOUT,MAX

ChooseR1andR2toprogramtheproperoutputvoltage.

Tominimizethepowerconsumptionunderlightloads,WhereFswistheswitchingfrequencyandIOUT,MAXis

itisdesirabletochooselargeresistancevaluesforboththemaximumloadcurrent.

R1andR2.Avalueofbetween10kΩand1MΩis

highlyrecommendedforbothresistors.IfVOUTis1.8V,TheSY8816isquitetolerantofdifferentripplecurrent

R1=50kΩischosen,thenR2canbecalculatedtobeamplitude.Consequently,thefinalchoiceofinductance

25kΩ:canbeslightlyoffthecalculationvaluewithout

VOUTsignificantlyimpactingtheperformance

R12)Thesaturationcurrentratingoftheinductormust

0.6V

0.6VFBbeselectedtobegreaterthanthepeakinductor

R2R1.currentunderfullloadconditions.

VOUT0.6VGNDR2

VOUT(1-VOUT/VIN,MAX)

ISAT,MINIOUT,MAX

2FSWL

InputCapacitorCIN:

Thisripplecurrentthroughinputcapacitoriscalculated

as: