SY8087

SY8087HighEfficiency1.5MHz,1.5ASynchronousStepDownRegulatorSY8087Rev0.2SilergyCorp.Confidential-PreparedforCustomerUseOnly1GeneralDescriptionTheSY8087isahigh-efficiency,highfrequencysynchronousstep-downDC-DCregulatorICcapableofdeliveringupto1.5Aoutputcurrents.SY8087operatesoverawideinputvoltagerangefrom3Vto5.5VandintegratesmainswitchandsynchronousswitchwithverylowRDS(ON)tominimizetheconductionloss.Lowoutputvoltagerippleandsmallexternalinductorandcapacitorsizesareachievedwithgreaterthan1MHzswitchingfrequency.OrderingInformationPackageCodeTemperatureCodeOptionalSpecCode□□□□(□□□□□□□□)□□□□SY8087PackageCodeTemperatureCodeOptionalSpecCode□□□□(□□□□□□□□)□□□□SY8087TemperatureRange:-40°Cto85°COrderingNumberPackagetypeNote①SY8087AACSOT23-51.5AFeatures•LowRDS(ON)forinternalswitches(top/bottom)180mΩ/120mΩ•3-5.5Vinputvoltagerange•Highswitchingfrequency1.5MHzminimizestheexternalcomponents•Internalsoftstartlimitstheinrushcurrent•100%dropoutoperation•RoHSCompliantandHalogenFree•Compactpackage:SOT23-5Applications•LCDTV•SetTopBox•NetPC•Mini-NotebookPC•AccessPointRouterTypicalApplicationsINGNDENCINVINON/OFFLXFBCOUTVOUTR1R2LC1(opt.)Figure1.SchematicdiagramSilergyCorp.Confidential-PreparedforRockchipwangzhentao高亮wangzhentao高亮wangzhentao高亮SY8087SY8087Rev0.2SilergyCorp.Confidential-PreparedforCustomerUseOnly2Pinout(topview)SOT23-5TopMark:HLxyz(devicecode:HL,x=yearcode,y=weekcode,z=lotnumbercode)PinNamePinNumberPinDescriptionEN1Enablecontrol.Pullhightoturnon.Donotfloat.GND2GroundpinLX3Inductorpin.Connectthispintotheswitchingnodeofinductor.IN4Powerinputpin.FB6OutputFeedbackPin.Connectthispintothecenterpointoftheoutputresistordivider(asshowninFigure1)toprogramtheoutputvoltage:Vout=0.6*(1+R1/R2).AbsoluteMaximumRatings(Note1)SupplyInputVoltage--------------------------------------------------------------------------------------------------6.0VEnable,FBVoltage---------------------------------------------------------------------------------------------VIN+0.6VPowerDissipation,PD@TA=25°C,SOT23-5------------------------------------------------------------------------------------------------------0.6WPackageThermalResistance(Note2)SOT23-5,θJA-------------------------------------------------------------------------------------------170°C/WSOT23-5,θJC--------------------------------------------------------------------------------------------130°C/WJunctionTemperatureRange---------------------------------------------------------------------------------------125°CLeadTemperature(Soldering,10sec.)---------------------------------------------------------------------------260°CStorageTemperatureRange------------------------------------------------------------------------------65°Cto150°CESDSusceptibility(Note2)HBM(HumanBodyMode)--------------------------------------------------------------------------------------------2kVMM(MachineMode)--------------------------------------------------------------------------------------------------200VDynamicLXvoltagein50nsduration--------------------------------------------------------------IN+3VtoGND-4VRecommendedOperatingConditions(Note3)SupplyInputVoltage--------------------------------------------------------------------------------------------3Vto5.5VJunctionTemperatureRange------------------------------------------------------------------------------40°Cto125°CAmbientTemperatureRange-------------------------------------------------------------------------------40°Cto85°CSilergyCorp.Confidential-PreparedforRockchipwangzhentao高亮wangzhentao高亮wangzhentao高亮wangzhentao高亮wangzhentao高亮SY8087SY8087Rev0.2SilergyCorp.Confidential-PreparedforCustomerUseOnly3ElectricalCharacteristics(VIN=5V,VOUT=2.5V,L=2.2uH,COUT=10uF,TA=25°C,unlessotherwisespecified)ParameterSymbolTestConditionsMinTypMaxUnitInputVoltageRangeVIN35.5VQuiescentCurrentIQIOUT=0,VFB=VREF⋅105%7080100µAShutdownCurrentISHDNEN=00.11µAFeedbackReferenceVoltageVREF0.5880.60.612VFBInputCurrentIFBVFB=VIN-5050nAPFETRONRDS(ON),P180200mΩNFETRONRDS(ON),N120160mΩPFETCurrentLimitILIM1.8AENrisingthresholdVENH1.5VENfallingthresholdVENL0.4VInputUVLOthresholdVUVLO2.7VUVLOhysteresisVHYS0.1VOscillatorFrequencyFOSC1.31.52.0MHzMinONTime50nsMaxDutyCycle100%ThermalShutdownTemperatureTSD160°CNote1:Stresseslistedastheabove“AbsoluteMaximumRatings”maycausepermanentdamagetothedevice.Theseareforstressratings.Functionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedintheoperationalsectionsofthespecificationsisnotimplied.Exposuretoabsolutemaximumratingconditionsforextendedperiodsmayremainpossibilitytoaffectdevicereliability.Note2:θJAismeasuredinthenaturalconvectionatTA=25°ConaloweffectivesinglelayerthermalconductivitytestboardofJEDEC51-3thermalmeasurementstandard.Pin2ofSOT23-5packagesisthecasepositionforθJCmeasurement.Testcondition:Devicemountedon2”x2”FR-4substratePCB,2ozcopper,withminimumrecommendedpadontoplayerandthermalviastobottomlayergroundplaneNote3:Thedeviceisnotguaranteedtofunctionoutsideitsoperatingconditions.SilergyCorp.Confidential-PreparedforRockchipwangzhentao高亮wangzhentao高亮SY8087SY8087Rev0.2SilergyCorp.Confidential-PreparedforCustomerUseOnly4SOT23-5Packageoutline&PCBlayoutdesign2.400.800.550.95TYP2.400.800.550.95TYP1.50-1.700.30-0.502.80-3.102.70-3.001.50-1.700.30-0.502.80-3.102.70-3.00RecommendedPadLayout0.1-0.150.25REF0.3-0.60.1-0.150.25REF0.3-0.61.0-1.30.01-0.11.90TYP0.95TYP1.0-1.30.01-0.11.90TYP0.95TYPNotes:Alldimensionsareinmillimeters.Alldimensionsdon’tincludemoldflash&metalburr.SilergyCorp.Confidential-PreparedforRockchip