Datasheet > G557

G557

更新时间： 2024-04-09 19:02:14

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G557 数据手册

Global Mixed-mode Technology Inc.

G557

Power Distribution Switch

Features

General Description

The G557 is an integrated power switch for

self-powered and bus-powered Universal Serial Bus

(USB) applications. G557A, G557B, G557C are

70mΩ High-Side MOSFET

(G557A,G557B,G557C)

Available with 3 Versions of Current Limits with

Foldback

70mΩ R_DS(ON)

Operating Range:2.7V to 5.5V

1.5mS 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

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.

OC is open-drain output report over-current or

over-temperature event and has typical 9ms deglitch

timeout period.

Output ( OC )

With Output Shutdown Pull-low Resister

SOP-8 ,MSOP-8,TDFN3X3-8 Packages

Applications

High-Side Power Protection Switch

USB Power Management

USB Host and Self-Powered Bubs

USB Bus-Powered Hubs

Hot Plug-In Power Supplies

Battery-Charger Circuits

Pin Configuration

Typical Application Circuit

G557

Power Supply

2.7V to 5.5V

OUT

GND

OUT

Load

OUT

GND

1µF

0.1µF

22µF

Thermal

Pad

EN(EN)

EN (EN)

OFF

EN (EN)

SOP-8/MSOP-8

TDFN3X3-8

Note: Recommend connecting the Thermal Pad

to the GND for excellent power dissipation.

*: ^{1µF of input capacitor is enough in most application cases.}

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

Pin#6 should be considered as OUT when circuit design and PCB layout, but it is NC pin actually.

TEL: 886-3-5788833

http://www.gmt.com.tw

Ver: 0.1

Feb 01, 2011

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