G525A1 查看數據表（PDF） - Global Mixed-mode Technology Inc

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G525A1

USB High-Side Power Switch Advance Information

Global Mixed-mode Technology Inc 

Global Mixed-mode Technology Inc.

G525A

Typical Applications

VCC

5.0V

Upstream

VBUS

100mA max.

VBUS

D+ 1µF

D－

GND

G912

IN OUT

GND

10k

3.3V USB Controller

VIN ON/OFF

1 µF OVERCURRENT

GND

100k

G525A

EN OUT

FLG IN

GND OUT

NC NC

Ferrite

Beads



＋

150 µF



VBUS

D+

D－

GND

USB

Port

Data

0.1 µF

Data

Single-Port Self-Powered USB Hub Application

Function Block Diagrams

EN

Clock

IN

Gate Control

BandGap

Reference

UVLO

Overcurrent

Limiting

CMP

Current

Sense

OUT

FLG

GND

Thermal Sense

Functional Description

The G525A1 and G525A2 are high-side 1-channel

switches with active-high and active-low enable inputs,

respectively. Fault conditions turn off or inhibit turn-on

of the output transistors and activate the open-drain

error flag transistors to pull FLG pin to ground.

Input and Output

IN (input) is the power supply connection to the logic

circuitry and the source of the output MOSFET. OUT

(output) is the drain of the output MOSFET. In a typical

application, current flows through the switch from IN to

OUT toward the load. Both OUT pins must be

connected together to the load.

The output MOSFET and driving circuit are also de-

signed to allow the MOSFET drain to be externally

forced to a higher voltage than the source (VOUT > VIN)

when the switch is off. In this situation, the G525A

avoids undesirable drain-to-body diode current flow by

connecting the body to the most positive voltage. If

VOUT >VIN when switch is enabled, current will flow

from VOUT to VIN.

Thermal Shutdown

Thermal shutdown protects G525A from excessive

power dissipation. If the die temperature exceeds

135°C, the MOSFETS switch is shut off and a fault

flag is activated. 10°C of hystersis prevents the switch

Ver: 1.2

Nov 11, 2002

TEL: 886-3-5788833

http://www.gmt.com.tw

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