矽力杰 Silergy SY8511B 4.5-100V 输入 1.2A 输出高效异步降压稳压器 规格书 (Datasheet)佰祥电子

SY8511B

HighEfficiency,200kHz,100VInput,1.2A

AsynchronousStepDownRegulator

GeneralDescriptionFeatures

TheSY8511Bisahighefficiency,currentmodeLowRDS(ON)forInternalN-channelPowerFET:1Ω

adaptiveconstantOFFtimecontrolledasynchronous4.5-100VInputVoltageRange

step-downDC/DCconvertercapableofdelivering1.2AOutputCurrentCapability

1.2Aoutputcurrent.TheSY8511Boperatesovera200kHzPseudoConstantSwitchingFrequency

wideinputvoltagerangefrom4.5Vto100VandInternalSoft-startLimitstheInrushCurrent

integratesmainswitchwithverylowRDS(ON)toHic-cupModeOutputShortCircuitProtection

minimizetheconductionloss.

ENON/OFFControlwithAccurateThreshold

Cycle-by-cyclePeakCurrentLimit

OrderingInformation0.6V±1%ReferenceVoltage

RoHSCompliantandHalogenFree

SY8511□(□□)□

TSOT23-6Package

TemperatureCode

PackageCode

OptionalSpecCodeApplications

OrderingNumberPackageTypeNote

SY8511BADCTSOT23-6Non-isolatedTelecommunicationBuckRegulator

SecondaryHighVoltagePostRegulator

AutomotiveSystems

ElectricBicycle

TypicalApplication

Efficiencyvs.OutputCurrent

(L=68µH/CDRH8D43-680NC)

100

CBSRBS

90

180

L1)

BSV%

VIN6OUT(

5

INLXy70

c

n

e

i60

CINc

i

C4f

R1COUTf

(opt.)E

50

4

ON/3VIN=24V,VOUT=12V

ENFB

OFFVIN=48V,VOUT=12V

40

GNDVIN=85V,VOUT=12V

2

R230

0.0010.010.11

OutputCurrent(A)

Figure1.SchematicDiagramFigure2.Efficiencyvs.OutputCurrent

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SY8511B

Pinout(topview)

BS16LX

GND25IN

FB34EN

(TSOT23-6)

TopMark:T5xyz(devicecode:T5,x=yearcode,y=weekcode,z=lotnumbercode)

PinNamePinNumberPinDescription

Boot-strappin.Supplyhighsidegatedriver.Connecta0.1µFceramiccapacitorin

BS1

serieswitha10ΩresistorbetweentheBSandtheLXpin.

GND2Groundpin.

Outputfeedbackpin.Connectthispintothecenterpointoftheoutputresistor

FB3divider(asshowninfigure1)toprogramtheoutputvoltage:

VOUT=0.6×(1+R1/R2).

EN4Enablecontrol.Pullhightoturnon.Donotleaveitfloating.

IN5Inputpin.DecouplethispintoGNDpinwithatleasta1µFceramiccapacitor.

LX6Inductorpin.Connectthispintotheswitchingnodeoftheinductor.

FunctionBlock

IN

CurrentSense

Comp

CurrentLimitation

InternalInputVCC

PowerUVLOBS

PowerFET

VCC

PWMControl

EN&LX

EnableProtection

ThresholdLogicOTP

Internal

SSTSCP

GND

VREF

FB

EA

Figure3.BlockDiagram

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SY8511B

AbsoluteMaximumRatings(Note1)

SupplyInputVoltage-0.3Vto100V

BS-LXVoltage-0.3Vto6V

EN,LXVoltage-0.3VtoVIN+0.3V

FBVoltage-0.3Vto24V

PowerDissipation,PD@TA=25°CTSOT23-61W

PackageThermalResistance(Note2)

θJA100°C/W

JC25°C/W

JunctionTemperatureRange-40°Cto150°C

LeadTemperature(Soldering,10sec.)260°C

StorageTemperatureRange-65°Cto150°C

DynamicLXVoltagein10nsDurationIN+3VtoGND-5V

RecommendedOperatingConditions(Note3)

SupplyInputVoltage4.5Vto100V

JunctionTemperatureRange-40°Cto125°C

AmbientTemperatureRange-40°Cto85°C

ElectricalCharacteristics

(VIN=48V,VOUT=12V,L=6.8µH,COUT=10µF,TA=25°C,IOUT=0.1A,unlessotherwisespecified.)

ParameterSymbolTestConditionsMinTypMaxUnit

InputVoltageRangeVIN4.5100V

QuiescentCurrentIQIOUT=0,VFB=VREF×105%100150µA

ShutdownCurrentISHDNEN=0920µA

FeedbackReference

V0.5940.60.606V

VoltageREF

FBInputCurrentIFBVFB=1V-5050nA

PowerFETRONRDS(ON)11Ω

PowerFETPeakCurrent

I1.82.12.6A

LimitLIM,TOP

ENRisingThresholdVENH1.141.21.26V

ENFallingThresholdVENL0.9411.06V

InputUVLOThresholdVUVLO4.5V

InputUVLOHysteresisVUVLO,HYS110mV

SwitchingFrequencyfSW200kHz

SwitchingFrequency

f-2020%f

AccuracySW,ACCSW

MinONTimetON,MIN80ns

MinOffTimetOFF,MIN80ns

Soft-startTimetSS800µs

ThermalShutdown

T150°C

TemperatureSD

ThermalShutdown

T15°C

HysteresisHYS

Note1:Stressesbeyond“AbsoluteMaximumRatings”maycausepermanentdamagetothedevice.Thesearefor

stressratings.Functionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedinthe

operationalsectionsofthespecificationsisnotimplied.Exposuretoabsolutemaximumratingconditionsmayaffect

devicereliability.

Note2:JAismeasuredinthenaturalconvectionatTA=25°Conatwo-layerSilergyEvaluationBoard.

Note3:Thedeviceisnotguaranteedtofunctionoutsideitsoperatingconditions.

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SY8511B

TypicalPerformanceCharacteristics

Efficiencyvs.OutputCurrentEfficiencyvs.OutputCurrent

(L=68µH/CDRH8D43-680NC)(L=47µH/CDRH8D43-470NC)

100100

9090

80

80

)

)

%

%70

(

(

y

y70

c

c

n

n60

e

e

i

i60

c

c

i

i

f

f

f

f50

E

E

50

VIN=24V,VOUT=12V40VIN=24V,VOUT=5V

VIN=48V,VOUT=12VVIN=48V,VOUT=5V

4030

VIN=85V,VOUT=12VVIN=85V,VOUT=5V

3020

0.0010.010.110.0010.010.11

OutputCurrent(A)OutputCurrent(A)

LoadTransientLoadTransient

(VIN=48V,VOUT=12V,IO=0~0.6A)(VIN=48V,VOUT=12V,IO=0.12~1.2A)

∆VOUT500mV/div∆VOUT500mV/div

IL0.5A/div

IL1A/div

Time(200μs/div)Time(200μs/div)

OutputRippleOutputRipple

(VIN=48V,VOUT=12V,IO=0A)(VIN=48V,VOUT=12V,IO=1.2A)

∆VOUT200mV/div∆VOUT200mV/div

VLX20V/divVLX20V/div

IL0.5A/divIL1A/div

Time(2µs/div)Time(10µs/div)

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SY8511B

StartupfromVINShutdownfromVIN

(VIN=48V,VOUT=12V,IO=0A)(VIN=48V,VOUT=12V,IO=0A)

VIN50V/divVIN50V/div

VOUT10V/divVOUT10V/div

VLX20V/divVLX20V/div

IL0.5A/divIL0.5A/div

Time(2ms/div)Time(40ms/div)

StartupfromVINShutdownfromVIN

(VIN=48V,VOUT=12V,IO=1.2A)(VIN=48V,VOUT=12V,IO=1.2A)

VIN50V/divVIN50V/div

VOUT10V/divVOUT10V/div

V20V/div

LXVLX20V/div

I1A/div

LIL1A/div

Time(10ms/div)Time(40ms/div)

StartupfromENShutdownfromEN

(VIN=48V,VOUT=12V,IO=0A)(VIN=48V,VOUT=12V,IO=1.2A)

VEN5V/divVEN5V/div

VOUT10V/div

VOUT10V/div

VLX20V/divVLX20V/div

I0.5A/div

LIL0.5A/div

Time(2ms/div)Time(400ms/div)

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SY8511B

StartupfromENShutdownfromEN

(VIN=48V,VOUT=12V,IO=0A)(VIN=48V,VOUT=12V,IO=0A)

VEN5V/divVEN5V/div

VOUT10V/div

VOUT10V/div

VLX20V/divVLX20V/div

I0.5A/div

LIL0.5A/div

Time(2ms/div)Time(400ms/div)

StartupfromENShutdownfromEN

(VIN=48V,VOUT=12V,IO=1.2A)(VIN=48V,VOUT=12V,IO