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 200?A with no load,and drops to < 1?A 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: 200?A

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