AP3301 DC-DC 降壓恒壓驅動IC LED電源驅動芯片 車載電視音響電源驅動

 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: 0.35?

 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