AP3301 DC-DC 降压恒压驱动IC LED电源驱动芯片 车载电视音响电源驱动

 Portable media playersDescrriipttiionThe AP3301-AESA is high efficiencysynchronous, PWM step-down DC/DCconverters working under an input voltage rangeof 2.5V to 5.5V. This feature makes theAP3301-AESA suitable for single Li-lonbattery-powered applications. 100% duty cyclecapability extends battery life in portable devices,while the quiescent current is 200µA with no load,and drops to < 1µA in shutdown.The internal synchronous switch is desired toincrease efficiency without an external Schottkydiode. The 1.4 MHz fixed switching frequencyallows the using of tiny, low profile inductors andceramic capacitors, which minimized overallsolution footprint.The AP3301-AESA converters are available inthe industry standard SOT-23-5 power packages(or upon request).

Featturress

 Up to 95% Efficiency

Current Mode Operation for Excellent Lineand Load Transient Response

 Low Quiescent Current: 200µA

Up to 700mA Load Current

 Soft-start

 Low Switch on Resistance RDS(ON), InternalSwitch: 0.35Ω

 Output Voltage：5.5V～0.6V

 Automatic PWM/PFM Mode Switching

 No Schottky Diode Required

 1.4MHz Fixed Frequency Switching

 Short-Circuit Protection

 Shutdown Quiescent Current: < 1µA

 Low Profile SOT-23-5 Package (lead-freepackaging is now available)Applliicattiion

 Digital cameras and MP3

Palmtop computers / PDAs

 Cellular phones

 Wireless handsets and DSL modems

 PC cards