xl1513原厂规格书(2014版)

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1、2A380KHz18VBuckDCtoDCConverterXL1513FeaturesGeneralDescription¢Wide3.6Vto18VInputVoltageRangeTheXL1513isa380KHzfixedfrequency¢OutputAdjustablefrom0.8Vto16VPWMbuck(step-down)DC/DCconverter,¢MaximumDutyCycle100%capableofdrivinga2Aloadwithhigh¢MinimumDropOut0.6Ve

2、fficiency,lowrippleandexcellentlineand¢Fixed380KHzSwitchingFrequencyloadregulation.Requiringaminimum¢2AConstantOutputCurrentCapabilitynumberofexternalcomponents,theregulator¢InternalOptimizePowerMOSFETissimpletouseandincludeinternal¢Highefficiencyfrequencycomp

3、ensationanda¢Excellentlineandloadregulationfixed-frequencyoscillator.¢TTLshutdowncapability¢ENpinwithhysteresisfunctionThePWMcontrolcircuitisabletoadjustthe¢Builtinthermalshutdownfunctiondutyratiolinearlyfrom0to100%.Anenable¢Builtincurrentlimitfunctionfunction

4、,anovercurrentprotectionfunction¢Builtinoutputshortprotectionfunctionisbuiltinside.Whenshortprotectionfunction¢AvailableinSOP8packagehappens,theoperationfrequencywillbereducedfrom380KHzto80KHz.AninternalcompensationblockisbuiltintominimizeApplicationsexternalc

5、omponentcount.¢LCDMonitorandLCDTV¢DigitalPhotoFrame¢Set-upBox¢ADSLModem¢Telecom/NetworkingEquipmentFigure1.PackageTypeofXL1513Rev1.0www.xlsemi.com12A380KHz18VBuckDCtoDCConverterXL1513PinConfigurationsFB18GNDEN27GNDXL1513NC36SWVIN4S5WFigure2.PinConfigurationofX

6、L1513(TopView)Table1PinDescriptionPinNumberPinNameDescription3NCNoConnected.SupplyVoltageInputPin.XL1513operatesfroma3.6Vto18V4VINDCvoltage.BypassVintoGNDwithasuitablylargecapacitortoeliminatenoiseontheinput.PowerSwitchOutputPin(SW).Outputistheswitchnodethat5,

7、6SWsuppliespowertotheoutput.GroundPin.Caremustbetakeninlayout.ThispinshouldbeplacedoutsideoftheSchottkyDiodetooutputcapacitorground7,8GNDpathtopreventswitchingcurrentspikesfrominducingvoltagenoiseintoXL1513.FeedbackPin(FB).Throughanexternalresistordivider1FBne

8、twork,Feedbacksensestheoutputvoltageandregulatesit.Thefeedbackthresholdvoltageis0.8V.EnablePin.DriveENpinlowtoturnoffthedevice,driveit2ENhightoturniton.Floatingisdefaulthigh.Rev1.0