AAT4644_06 ANALOGICTECH [Advanced Analogic Technologies], AAT4644_06 Datasheet

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AAT4644_06

Manufacturer Part Number
AAT4644_06
Description
4-Channel Current Limited Load Switch
Manufacturer
ANALOGICTECH [Advanced Analogic Technologies]
Datasheet
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. Current limit is factory programmed
at 1A. Additional protection is provided with under-
voltage lockout. The switches are turned off when
the input voltage drops below a preset level. The
quiescent supply current is typically 20µA. The
AAT4644 is a flexible solution, allowing system
designers to gang outputs together for lower
R
The AAT4644 is available in a Pb-free, 8-pin
TSSOP or SOP package and is specified over the
-40°C to +85°C temperature range.
Typical Application
4644.2006.05.1.2
DS(ON)
and higher current limit.
3.3V - 5V
INPUT
2, 7
IN
AAT4644
GND
4
4-Channel Current Limited Load Switch
OUT1
OUT2
OUT3
OUT4
Features
Applications
1
3
8
6
500mA per Channel Steady State
4 x 1A Current Limit Trip Point
Over-Temperature Protection
Fast Transient Response:
— 1µs (Typ) Response to Short Circuit
100mΩ Typical R
Under-Voltage Lockout
Temperature Range: -40°C to +85°C
8-Pin TSSOP or SOP Package
Desktop PCs
Peripheral Ports
USB Ports
DS(ON)
SmartSwitch
OUTPUT1
OUTPUT2
OUTPUT3
OUTPUT4
AAT4644
1

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AAT4644_06 Summary of contents

Page 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. Current limit is factory programmed at 1A. Additional protection is provided with under- voltage lockout. The switches ...

Page 2

Pin Descriptions Pin # Symbol 1 OUT1 OUT2 4 GND 5 N/C 6 OUT4 8 OUT3 Pin Configuration SOP-8 (Top View) OUT1 OUT2 3 GND 4 2 4-Channel Current Limited Load Switch Function ...

Page 3

Absolute Maximum Ratings T = 25°C, unless otherwise noted. A Symbol Description GND IN V OUT to GND OUT I Output Current OUT T Operating Junction Temperature Range J V ESD Rating —HBM 2 ESD T Maximum ...

Page 4

Typical Characteristics T = 25°C, unless otherwise noted. A Quiescent Current vs. Temperature -40 - Temperature (°C) Current Limit 2 1 ...

Page 5

Typical Characteristics T = 25°C, unless otherwise noted vs. Temperature DS(ON) 150.0 140.0 130 120.0 110.0 100.0 V 90.0 IN 80.0 70.0 -40 - Temperature (°C) 4644.2006.05.1.2 4-Channel Current Limited ...

Page 6

Functional Block Diagram IN Under-Voltage Lockout Over-Temperature Protection 6 4-Channel Current Limited Load Switch Channel 1 Control Current Limit Channel 2 Control Current Limit Channel 3 Control Current Limit Channel 4 Control Current Limit GND AAT4644 OUT1 OUT2 OUT3 OUT4 ...

Page 7

Ordering Information Package SOP-8 TSSOP-8 All AnalogicTech products are offered in Pb-free packaging. The term “Pb-free” means semiconductor products that are in compliance with current RoHS standards, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. ...

Page 8

All dimensions in millimeters. © Advanced Analogic Technologies, Inc. AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work rights, ...

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