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
