AAT4644 datasheet(1/8 Pages) ANALOGICTECH

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SmartSwitch™

AAT4644

4-Channel Current Limited Load Switch

4644.2002.01.0.92

1

General Description

The AAT4644 is a four-channel resettable fuse. It

utilizes independent current-limited and thermally

protected P-channel MOSFETs to protect against

short circuits. Each switch's current limit is factory

programmed at 1A. Additional protection is provid-

ed with undervoltage lockout; the switches are

turned off when the input voltage drops below a

preset level. The quiescent supply current is typi-

cally 20µA.

The AAT4644 is a flexible solution,

allowing system designers to gang outputs togeth-

er for lower RDS(ON) and higher current limit.

The AAT4644 is available in 8 pin TSSOP or SOP

packages, specified over -40 to 85°C.

Features

•

500mA per channel steady state

•

4 X 1A current limit trip point

•

Over-temp protection

•

Fast transient response:

•

1µs (typ) response to short circuit

•

100m

Ω typical R

DS(ON)

•

Undervoltage Lockout

•

Temp range -40 to 85°C

•

8 pin TSSOP or SOP packages

Applications

•

USB ports

•

Peripheral ports

•

Desktop PCs

Typical Application

AAT4644

2,7

1

3

8

6

4

IN

INPUT

3.3V - 5V

GND

OUT1

OUT2

OUT3

OUT4

OUTPUT1

OUTPUT2

OUTPUT3

OUTPUT4

Số phần tương tự - AAT4644

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