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Global Mixed-mode Technology Inc.

G5410

Low noise Quasi-PWM/PFM Asynchronous Step

Down Converter

Features

+2.8V to +6V Input Range

Adjustable Output from 0.5V to V

CC

鈥?V

3A Guaranteed Output Current

95% Efficiency

Very Low Quiescent Current: 30uA(Typ.)

100% Duty Cycle for low dropout mode

600kHz +-30% Quasi PWM Operation.

Small, 6-Pin SOT23 Package

General Description

The G5410 is a low-noise, Quasi PWM/PFM, DC-DC

step-down converter. It powers low voltage logic and

core in small portable systems such as cellular phones,

communicating PDAs, and handy-terminals.

The device features an internal MOSFET driver to be

high efficiency buck DC/DC converter. Excellent noise

characteristics and near fixed frequency operation

provide easy post-filtering. The G5410 is ideally suited

for Li-Ion battery applications. It is also useful for +3V

or +5V fixed input applications. The device automatic

operates in two modes for higher efficiency. PWM

mode operates at a fixed frequency regardless of the

load. PFM Mode extends battery life by switching to a

pulse-skipping mode during light loads, it reducing

quiescent supply current to under 30碌A(chǔ).

The G5410 can deliver over 3A. The output voltage

can be adjusted from 0.5V to V

CC

-1V by external ref-

erence with the input range of +2.8V to +6V. Other

features of the G5410 include high efficiency, low

dropout mode (100% duty) at input low voltage stage.

It is available in a space-saving 6-pin SOT23-6 pack-

age

Applications

Desktop and Notebook Computers

LAN Servers

Industrial Controls

PDA

Digital Still Camera

Central Office Telecom Equipment

Ordering Information

Part*

G5410

Temp. range

-40擄C to +85擄C

Pin-package

SOT23-6

Pin Configuration

Typical Operating Circuit

G5410

VREF

1

6

GND

VCC

C1

0.1碌F

3

VCC

FB

VREF

VDD

DRV

GND

4

5

6

R3

1M

Q1

Si3347

C4

100碌F

VDD

FB

2

5 DRV

VREF

2

1

C2

0.1碌F

D1

L1

5碌H

VOUT

C6

220碌F

VCC

3

SOT 23-6

4 VDD

G5410

C3

0.1碌F

R2

10K

C5

470pF

Ver 0.1 Preliminary

Jul 11, 2002

TEL: 886-3-5788833

http://www.gmt.com.tw

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• G5410
  英文版
  Low noise Quasi-PWM / PFM Asynchronous Step Down Converter.|...
  ETC
  G5410

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