Ver: 0.2

Mar 13, 2012

TEL: 886-3-5788833

http://www.gmt.com.tw

1

G543

Global Mixed-mode Technology

Power Distribution Switch

Features

70m

Ω High-Side MOSFET

Internal Current Limit to 3.3A (TYP)

Operating Range:2.7V to 5.5V

1mS Typical Rise Time

Fast Overcurrent Response:3µS (TYPICAL)

Under voltage Lockout

100µA Quiescent Supply Current

1µA Maximum Shutdown Supply Current

Logic Level Enable Pin, Available with

Active-High or Active-Low Version

No Reverse Current when Power Off

Deglitched Open-Drain Over-Current Flag

Output (

MSOP-8 Package

Applications

High-Side Power Protection Switch

USB Power Management

Hot Plug-In Power Supplies

Battery-Charger Circuits

General Description

The

G543

is

an

integrated

power

switch

for

70mohm.

Several Protection features include current limiting

with foldback, and thermal shutdown to prevent catas-

trophic switch failure caused by increasing power dis-

sipation when continuous heavy loads or short circuit

occurs. A built-in charge pump is used to drive the

N-channel MOSFET that is free of parasitic body diode

to eliminate any reversed current flow across the

switch when it is powered off.

over-temperature event and has typical 9ms deglitch

timeout period.

Ordering Information

ORDER

NUMBER

MARKING

ENABLE

Current

Limit

Output

MOS

Output

Shutdown

Resistor

TEMP.

RANGE

PACKAGE

(Green)

G543A1P81U

G543A1

Active High

3.3A

70mhom

No

-40°C to +85°C

MSOP-8

G543A2P81U

G543A2

Active Low

3.3A

70mhom

No

-40°C to +85°C

MSOP-8

Note: P8: MSOP-8

1: Bonding Code

U: Tape & Reel

Pin Configuration

Typical Application Circuit

0.1µF

22µF

Load

OC

EN(EN)

1µF

Power Supply

2.7V to 5.5V

OUT

IN

ON

OFF

*

If the PCB trace of power rail to IN is long, larger input capacitor is necessary.

G543

8

6

5

1

2

3

4

GND

MSOP-8

G543

7

OUT

EN (EN)

OUT

OC

IN

IN

NC

0.1µF

22µF

Load

OC

EN(EN)

1µF

Power Supply

2.7V to 5.5V

OUT

IN

ON

OFF

*

If the PCB trace of power rail to IN is long, larger input capacitor is necessary.

G543

8

6

5

1

2

3

4

GND

MSOP-8

G543

7

OUT

EN (EN)

OUT

OC

IN

IN

NC