G5338 [GMT]

High-Speed Step-Down Controller;


型号：	G5338
厂家：	GLOBAL MIXED-MODE TECHNOLOGY INC
描述：	High-Speed Step-Down Controller
文件：	总1页 (文件大小：65K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

G5338

Global Mixed-mode Technology

High-Speed Step-Down Controller

Features

General Description

Ultra-High Efficiency

G5338 uses constant on-time control scheme to han-

dle wide input/output voltage ratios with ease and pro-

vides 100ns “instant-on” response to load transients

while maintaining a relatively constant switching fre-

quency. The G5338 achieves high efficiency at a re-

duced cost by eliminating the current-sense resistor

found in traditional current-mode PWMs. Efficiency is

further enhanced by an ability to drive very large syn-

chronous rectifier MOSFETs. Single-stage buck con-

version allows these devices to directly step down

high-voltage batteries for the highest possible effi-

ciency. The noiseless pulse-skipping mode setting

maintains the switching frequency above 25kHz to

eliminates the audio noise. The G5338 is intended for

CPU core, chipset, DRAM, or other low-voltage sup-

plies as low as 0.5V. The G5338 is available in

TQFN2X2-12 package.

4700ppm/°C R_DS(ON)Current Sensing ( without

Current-Sense Resistor )

Quasi-PWM with 100ns Load-Step Response

Built in 1% 0.5V Reference Voltage

0.5V to 3.3V Adjustable Output Range

4.5V to 28V Battery Input Range

Integrated Boost Diode

OVP & UVP

1.5ms Voltage Servo Soft-Start

Drives Large Synchronous-Rectifier FETs

Power-Good Indicator

Thermal Shutdown (Non-latch)

Applications

Notebook Computers

CPU Core Supply

I/O Supply

Chipset/RAM Supply as Low as 0.5V

Ordering Information

ORDER

NUMBER

G5338K71U

TEMP.

RANGE

PACKAGE

(Green)

MARKING

5338

-40°C to +85°C

TQFN2X2-12

Note: K7: TQFN2X2-12

1: Bonding Code

U : Tape & Reel

Pin Configuration

13 GND

PGOOD

Thermal

Pad

MODE

G5338 TQFN2X2-12

TEL: 886-3-5788833

http://www.gmt.com.tw

Ver: 0.4

May 03, 2012

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