G5385A [GMT]

High Efficiency 8A Synchronous Buck Converter;


型号：	G5385A
厂家：	GLOBAL MIXED-MODE TECHNOLOGY INC
描述：	High Efficiency 8A Synchronous Buck Converter
文件：	总1页 (文件大小：92K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

G5385A

Global Mixed-mode Technology

High Efficiency 8A Synchronous Buck Converter

Features

General Description

Ultra-High Efficiency

G5385A is a 8A, synchronous DC/DC buck converter

with integrated 30mΩ N-channel high-side MOSFET

and 15mΩ N-channel low-side MOSFET. It uses con-

stant on-time control scheme to handle wide in-

put/output voltage ratios with ease and provides 100ns

“instant-on” response to load transients while main-

taining a relatively constant switching frequency. The

G5385A achieves high efficiency at a reduced cost by

eliminating the current-sense resistor found in tradi-

tional current-mode PWMs. Single-stage buck conver-

sion allows these devices to directly step down

high-voltage batteries for the highest possible effi-

ciency. The G5385A is intended for the power supply

of Notebook Computer, or other low-voltage supplies

as low as 0.75V. The G5385A is available in

QFN4X4-28 package.

Low Quiescent Current of 60µA

Integrated 15mΩ at VCC=5V N-Channel

MOSFET for Low Side

Integrated 30mΩ at VCC=5V N-Channel

MOSFET for High Side

No Current-Sense Resistor (Lossless I_LIMIT)

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

3V to 28V Adapter or Battery Input Range

Integrated Boost Switch

OVP & UVP

Over Temperature Protection (non-latch)

2ms Soft-Start

Power-Good Indicator

Applications

Notebook Computers

I/O Supply

Chipset/RAM Supply as Low as 0.75V

Networking Power Supply

Ordering Information

ORDER

NUMBER

TEMP.

RANGE

PACKAGE

(Green)

MARKING

G5385AQN1U

5385A

-40°C to +85°C

QFN4X4-28

Note: QN: QFN4X4-28

1: Bonding Code

U: Tape & Reel

Pin Configuration

PGOOD

V+

PGND

G5385A QFN4X4-28

Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.

TEL: 886-3-5788833

http://www.gmt.com.tw

Ver: 0.2

Aug 22, 2013