G5309QN1U高效10A同步降壓轉(zhuǎn)換器

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