台湾致新 G5309QN1U QFN4X4-28 代理商主推

　　General Description

　　G5309 is a 10A, synchronous DC/DC buck converter

　　with integrated 20mΩ N-channel high-side MOSFET

　　and 8.5mΩ N-channel low-side MOSFET. It uses constant

　　on-time control scheme to handle wide input/

　　output voltage ratios with ease and provides 100ns

　　“instant-on” response to load transients while maintaining

　　a relatively constant switching frequency. The

　　G5309 achieves high efficiency at a reduced cost by

　　eliminating the current-sense resistor found in traditional

　　current-mode PWMs. Single-stage buck conversion

　　allows these devices to directly step down

　　high-voltage batteries for the highest possible efficiency.

　　The built-in 5V LDO supports 20mA for internal

　　circuits. The G5309 is intended for the main power

　　supply of LCD TV, Notebook Computer, or other

　　low-voltage supplies as low as 0.75V. The G5309 is

　　available in QFN4X4-28 and QFN5X5-32 package.

　　Applications

　　LCD Monitor/LCD TV

　　Notebook Computers

　　I/O Supply

　　Chipset/RAM Supply as Low as 0.75V

　　Networking Power Supply