世微AP3301DC-DC降压恒压驱动ICLED电源芯片车载电视音响驱动

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. 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