Datasheet > G551/2

G551/2

更新时间： 2024-11-15 17:01:27

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数据手册

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G551/2 数据手册

Global Mixed-mode Technology Inc.

G551/G552

Current-Limit Switches

Features

General Description

700mΩ On-Resistance

The G551/G552 family of switches feature internal cur-

rent limiting to prevent host devices from being dam-

aged due to faulty load conditions. These analog

switches have a low 0.7Ω on-resistance and operate

from a 2.0V to 5.5V input voltage range. They are

available with guaranteed 50mA and 100mA current

limits, making them ideal for load-switching applica-

tions.

2 Versions of Current Limits, 85mA (G551B1/ B2 &

G552B1/B2) and 170mA (G551A1/A2 & G552A1/ A2)

2V to 5.5V Supply Range

Undervoltage Lockout

85μA Supply Current

1μA Maximum Shutdown Current

Auto-Restart Function (G551A1/B1 & G552A1/B1)

or Latch-off Function (G551A2/B2 & G552A2/B2)

Active High Enable (G551) or Active Low Enable

(G552)

When the switch is on and a load is connected to the

port, a typical blanking time of 40ms ensures that the

transient voltages settle down. If after this blanking

time the load current is greater than the current limit,

the G551A2/B2 & G552A2/B2 enter a latch-off state

Thermal-Shutdown Protection

Reverse-Current Limit Protection

40ms Blanking Time

where the switch is turned off and FLAG is issued to

the microprocessor. The switch can be turned on again

by cycling the power or the ON pin.

280ms Auto-Restart Time (G551A1/B1 & G552A1/B1)

Fault FLAG Function

Fast Current-Limit Response Time

SC-70-5( SOT-353) Package

The G551A1/B1 & G552A1/B1 have an auto-restart

feature where the switch turns off after the blanking

time and then continuously checks to see if the over-

load condition is present. The switch remains on after

the overload condition disappears. The ON pin of

G551 series are active high, while G552 series are

active low.

Applications

PDAs

Cell Phones

GPS Systems

Hand-Held Devices

Pin Configuration

Typical Application Circuit

G551/G552

VOUT

GND

VIN

OUT

V_OUT

V_IN

VIN

FLAG

OFF

(ON)

GND

FLAG

SC-70-5 (SOT-353)

() is for G552

TEL: 886-3-5788833

http://www.gmt.com.tw

Ver: 1.3

Aug 24, 2009

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