INTRODUCTIONTheCE8303isaCMOSPFM-controlstep-upswitchingDC/DCconverter.ThePFMcontrollerallowsthedutyratiotobeautomaticallyswitchedaccordingtotheload,enablingproductswithalowrippleoverawiderange,highefficiency,andhighoutputcurrent.WiththeCE8303,astep-upswitchingDC/DCconvertercanbeconfiguredbyusinganexternalcoil,capacitor,anddiode.Thebuilt-inMOSFETisturnedoffbyaprotectioncircuitwhenthevoltageattheLXpinexceedsthelimittopreventitfrombeingdamaged.Thisfeature,alongwiththeminipackageandlowcurrentc***umption,makestheCE8303idealforapplicati***suchasthepowersupplyunitofportableequipment.FEATURESLowvoltageoperation:Startupat0.9V@IOUT=1mAWorkingfrequency:300KHzExternalparts:Coil,capacitor,diodeAccuracyof&plu***n;2%Highefficiency：87%（typ.）ShutdownfunctionLowripple,LownoiseAPPLICATI***DigitalcamerasElectronicnotebooksandPDAsPortableCD/MDplayersCameras,videoequipment,Communicati***equipmentPowersupplyformicrocomputers)