产品详情

General Description

G5332 is a 8A, 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

G5332 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 G5332 is intended for the power supply of Notebook Computer, or other low-voltage supplies as low as 0.75V. The G5332 is available in QFN3X3-21 package.

Features

■  Ultra-High Efficiency

■  Low Quiecent Current of 17μA

■  Integrated 8.5mΩ at VDD=5V N-Channel MOSFET for Low Side

■  Integrated 20mΩ at VDD=5V N-Channel MOSFET for High Side

■  No Current-Sense Resistor (Lossless ILIMIT)

■  Quasi-PWM with 100ns Load-Step Response

■  1% VOUT Accuracy Over Line and Load

■  Programmable Switching Frequency

■  0.75V to 3.6V Adjustable Output Range

■  4.5V to 28V Adapter or Battery Input Range

■  Integrated Boost Switch

■  OVP & UVP

■  Over Temperature Protection (non-latch)

■  3.3ms Soft-Start

■  Power-Good Indicator

Applications

■  Notebook Computers

■  I/O Supply

■  Chipset/RAM Supply as Low as 0.75V

■ Networking Power Supply