XA2317

XA2317 Synchronous Boost DC/DC Regulator Features Up to 94% Efficiency ：Low voltage start-up 0.9V Shut-down current: < 1µA ： ～Input voltage 0.9V 4.4V ： ～Output voltage 2.5V 4.3V (Up to 5V with Schottky) ΩLow switch on resistance RDS(ON), Internal switch: 0.35 1.4MHz fixed frequency switching Automatic PWM/PFM mode switching High switch on current: 0.9A Low profile SOT-23-6 package (lead-free packaging is now available) Applications Digital cameras and MP3 Palmtop computers / PDAs Cellular phones Wireless handsets and DSL modems PC cards Portable media players Description The XA2317 is high efficiency synchronous, PWM step-up DC/DC converters optimized to provide a high efficient solution to medium power systems. The devices work under the input voltage between 0.9V and 4.4V with a 1.4MHz fixed frequency switching. These features minimize overall solution footprint by allowing the use of tiny, low profile inductors and ceramic capacitors. Automatic PWM/PFM mode switching a...