矽力杰 Silergy SA23003C 同步降压转换器 规格书 Datasheet 佰祥电子

SA23003C

High-Efficiency,5.5V,3A,

SingleSynchronousBuckConverter

GeneralDescriptionKeyFeatures

TheSA23003Chighefficiency2.35MHzsynchronous2.8Vto5.5VInputVoltageRange

buckconverteroperatesoveraninputvoltagerangeofUpto3AOutputCurrent

2.8Vto5.5Vandcandeliveranoutputcurrentupto3A.ExternalAdjustableVoltagewith±1.5%Reference

ItintegratesatopMOSFETandabottomMOSFETwithAccuracy

verylowRDS(ON)tominimizeconductionloss.The1μAShutdownCurrent(Typical)

2.35MHzconstantswitchingfrequencyreducestheFixed2.35MHzSwitchingFrequency

requiredexternalinductorandcapacitorvalues.FixedFrequencyPWMOperatingMode

100%Duty-CycleCapable

TheSA23003Cusesapeakcurrentmodecontrol

Cycle-by-CycleCurrentLimitProtection

architecture.Itoperatesinfixedfrequencypulsewidth

HiccupModeShort-CircuitProtection

modulation(PWM)modeatlighttoheavyloads,thereby

PowerGoodIndicator

maintainingsmalloutputvoltagerippleovertheentire

ThermalShutdown

loadcurrentrange.Italsoprovidescycle-by-cyclecurrent

CompactDFN1.4×1.8-6Package

limitprotection,outputshort-circuitprotection,and

AutomotiveAEC-Q100Grade1Certified

overtemperatureprotection.

TheSA23003CisavailableinacompactApplications

DFN1.4mmx1.8mm-6pinpackage.

AutomotiveInfotainmentandCluster

ADAS

AutomotiveDisplay

OtherElectronicEquipment

EfficiencyvsOutputCurrent

（VOUT=1.8V，L=0.47μH（DFE252012PD-R47M=P2））

100.00

90.00

L80.00

VIN：2.8Vto5.5V0.47μHV1.8V

43OUT：

VINSW70.00

RtopCff(%)60.00

200kΩ22pF

CIN1ENFB650.00

10μF

Co

RPG

22μF40.00

100kΩ

RbotEfficiency

5PGGND2100kΩ30.00Vin=3.3V

20.00Vin=3.6V

Vin=4.2V

10.00Vin=5V

0.00

0.0010.0100.1001.000

OutputCurrent(A)

Figure1.SchematicDiagramFigure2.EfficiencyvsLoadCurrent

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SA23003C

OrderingInformationPinout(topview)

OrderingTop

PackageType

PartNumberMarkPG54VIN

DFN1.4×1.8-6

SA23003CTWDRoHS-CompliantandHalogen-9mxyzFB63SW

Free

x=yearcode,y=weekcode,z=lotnumbercode

EN12GND

(DFN1.4×1.8-6)

PinDescription

PinNoPinNamePinDescription

Deviceenablepin,logic-highenable.Thereisnointernalpulldownresistor.Donotleave

1EN

floating.

2GNDGround

3SWInductorpin.Connectthispintotheswitchingnodeofinductor.

Powerinputpin.DecouplethispinfromtheGNDpinwithatleasta10μFceramic

4VIN

capacitor.

5PGPowergoodpin.Open-drainoutput.Apullupresistorisrequired(100kΩ,forexample).

6FBOutputvoltagefeedbackpin.Theoutputvoltagereferenceis0.6V.

BlockDiagram

VIN

EN

Device

controlPWM

PGcontrolSW

&&

Driver

Zerocross

GND

Q

QB

S

R

Osc.

FB

gm

Ref

+

Bandgap-

Slope

Figure3.FunctionalBlockDiagram

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SA23003C

AbsoluteMaximumRatings

Parameter(Note1)MinMaxUnit

VIN-0.36.5

FB,EN,PG-0.3VIN+0.3V

DynamicSWtoGNDVoltagein20nsDuration-3VIN+1.5

JunctionTemperature,Operating-40150

LeadTemperature(Soldering,10s)260°C

StorageTemperature-65150

ESDSusceptibility

HBM(HumanBodyModel)2000

V

CDM(ChargeDeviceModel)AllPins500

ThermalInformation

Parameter(Note2)TypUnit

θJAJunction-to-AmbientThermalResistance125

θJBJunction-to-BoardThermalResistance69

°C/W

θJC_TOPJunction-to-CaseTopThermalResistance29

ΨJTJunction-to-TopCharacterizationParameter4

Parameter(Note3)TypUnit

θJAJunction-to-AmbientThermalResistance60

θJBJunction-to-BoardThermalResistance31

°C/W

θJC_TOPJunction-to-CaseTopThermalResistance29

ΨJTJunction-to-TopCharacterizationParameter3

PDPowerDissipation@TA=25°C2.1W

RecommendedOperatingConditions

ParameterMinMaxUnit

VIN2.85.5V

AmbientTemperature-40125

°C

JunctionTemperature-40150

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SA23003C

ElectricalCharacteristics

(2.8V≤VIN≤5.5V,-40°C≤TJ≤125°C.typicalvaluesatVIN=5VandTJ=25°C,unlessotherwisenoted)

ParameterSymbolTestConditionsMinTypMaxUnit

UVLORisingThresholdVUVLO_R2.62.72.8

V

UVLOFallingThresholdVUVLO_F2.452.552.65

VIN

ShutdownCurrentAISDAEN=0V,TJ=25°C12

μA

ShutdownCurrentBISDBEN=0V,TJ=125°C612

ENLogicHighThresholdVEN_H1.2

ENV

ENLogicLowThresholdVEN_L0.4

SwitchingFrequencyfSW22.352.7MHz

HSFETRDS(ON)RDS(ON)_HSVIN=5V83

PowerStagemΩ

LSFETRDS(ON)RDS(ON)_LSVIN=5V43

DischargeResistorRDISCHARGE200Ω

OutputFeedback

V591600609mV

FeedbackandReferenceREF

Soft-Start

Soft-StartTimetssOutputfrom10%to90%0.20.41ms

Falling(Fault)VoltageVPGTH_FFVFBaspercentofVREF808590%

Rising(Good)VoltageVPGTH_RGVFBaspercentofVREF859095%

PowerGoodRising(Fault)VoltageVPGTH_RFVFBaspercentofVREF110115120%

Falling(Good)VoltageVPGTH_FGVFBaspercentofVREF105110115%

DelayTimetPG_DELAY17μs

ThermalShutdown

TSD150165180

ThermalThreshold

°C

ShutdownThermalShutdown

TSDHYS101520

Hysteresis

PeakCurrentLimitILIMIT_P4.05.06.0

ValleyFoldbackCurrent

ILIMIT_V2.33.54.5

CurrentLimitLimitA

NegativeValleyCurrent

ILIMIT_N11.62.2

Limit

Short-CircuitThresholdVSCPVFBaspercentofVREF203040%

Short-Circuit

Short-CircuitResponseFromVFB<VSCPtostopswitching.

ProtectiontSCP51020μs

TimeNodelayontheotherside,VIN=5V.

Note1:Stressesbeyondthe“AbsoluteMaximumRatings”maycausepermanentdamagetothedevice.Thesearestress

ratingsonly.Functionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedintheoperational

sectionsofthespecificationisnotimplied.Exposuretoabsolutemaximumratingconditionsforextendedperiodsmayaffect

devicereliability.

Note2:TheparametersaremeasuredinthenaturalconvectionatTA=25°C.Devicemountedon4-layertestboardof

JESD51-7thermalmeasurementstandard.

Note3:TheparametersaremeasuredinthenaturalconvectionatTA=25°C.DevicemountedonSilergy4-layer,6”x6”

FR-4substratePCB,1ozcopper,withminimumrecommendedpadontoplayerandthermalviastobottomlayerground

plane.

Note4:Thedeviceisnotguaranteedtofunctionoutsideitsoperatingconditions.

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SA23003C

TypicalPerformanceCharacteristics

(TA=25°C,VIN=5V,VOUT=1.8V,L=0.47µH,COUT=22µF,unlessotherwisenoted)

EfficiencyvsOutputCurrentEfficiencyvsOutputCurrent

（VOUT=1.8V，L=0.47μH（DFE252012PD-R47M=P2））

（VOUT=1.2V，L=0.47μH（DFE252012PD-R47M=P2））

100.00

100.00

90.00

90.00

80.0080.00

70.0070.00

(%)

(%)60.0060.00

50.0050.00

40.0040.00

EfficiencyEfficiency

EfficiencyEfficiency30.0030.00

Vin=3.3VVin=3.3V

Vin=3.6V

20.00Vin=3.6V20.00

Vin=4.2VVin=4.2V

10.00Vin=5V10.00Vin=5V

0.000.00

0.0010.0100.1001.0000.0010.0100.1001.000

OutputCurrent(A)OutputCurrent(A)

EfficiencyvsOutputCurrentLoadTransientResponse

(VIN=5V,Vout=1.8V,IOUT=0.3~3A)

（VOUT=3.3V，L=0.47μH（DFE252012PD-R47M=P2））

100.00

90.00

ΔVOUT=100mV/div

80.00

2

70.00

(%)60.00

50.00

40.00IL=2A/div

EfficiencyEfficiency30.00

20.00

Vin=3.3V

10.00Vin=5V4

0.00

0.0010.0100.1001.000

OutputCurrent(A)Time(400μs/div)

StartupfromVINStartdownfromVIN

(VIN=5V,VOUT=1.8V,IOUT=3A)(VIN=5V,VOUT=1.8V,IOUT=3A)

VIN=5V/div

VIN=5V/div

VOUT=1V/div

11

VOUT=1V/div

VLX=5V/div

22

VLX=5V/div

33

IL=2A/div

IL=2A/div

44

Time(20ms/div)Time(20ms/div)

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SA23003C

StartupfromVENStartdownfromVEN

(VIN=5V,VOUT=1.8V,IOUT=3A)(VIN=5V,VOUT=1.8V,IOUT=3A)

VEN=5V/div

VEN=5V/div

11VOUT=1V/div

VOUT=1V/div

VLX=5V/div

22

VLX=5V/div

33

IL=2A/div

IL=2A/div

44

Time(10ms/div)Time(10ms/div)

OutputRippleOutputRipple

(VIN=5V,VOUT=1.8V,IOUT=0A)(VIN=5V,VOUT=1.8V,IOUT=3A)

ΔVOUT=20mV/divΔVOUT=10mV/div

22

VLX=5V/div

VLX=5