AAT4280A-3(2005) 查看數據表（PDF） - Advanced Analogic Technologies

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AAT4280A-3
(Rev.:2005)

Slew Rate Controlled Load Switch

Advanced Analogic Technologies 

General Description

The AAT4280A SmartSwitch™ is a member of

AnalogicTech's Application Specific Power MOS-

FET™ (ASPM™) product family. The AAT4280A is

a P-channel MOSFET power switch designed for

high-side load-switching applications. The device

has a typical RDS(ON) of 80mΩ, allowing increased

load switch power handling capacity and is avail-

able in three different versions with flexible turn-on

and turn-off characteristics -- from very fast to slew

rate limited. The standard AAT4280A (-1) version

has a slew rate limited turn-on load switch and is

functionally compatible with the AAT4250 device,

while offering superior RDS(ON) characteristics. The

AAT4280A (-2) version features fast load switch

turn-on capabilities, typically less than 500ns turn-

on and 3µs turn-off times. The AAT4280A (-3) vari-

ation offers a shutdown load discharge circuit to

rapidly turn off a load circuit when the switch is dis-

abled. All AAT4280A load switch versions operate

with an input voltage ranging from 1.5V to 5.5V,

making them ideal for both 3V and 5V systems.

Input logic levels are TTL and 2.5V to 5V CMOS

compatible. The quiescent supply current is very

low, typically 25nA.

The AAT4280A is available in an 8-pin SC70JW

package and is specified over the -40°C to +85°C

temperature range.

AAT4280A

Slew Rate Controlled Load Switch

Features

SmartSwitch™

• 1.5V to 5.5V Input Voltage Range

• Very Low RDS(ON), Typically 80mΩ (5V)

• Slew Rate Limited Turn-On Time Options

— 1ms

— 0.5µs

— 100µs

• Fast Shutdown Load Discharge Option

• Low Quiescent Current

— 25nA (typ)

• TTL/CMOS Input Logic Level

• Temperature Range: -40ºC to +85°C

• 4kV ESD Rating

• 8-Pin SC70JW Package

Applications

• Cellular Telephones

• Digital Still Cameras

• Hot Swap Supplies

• Notebook Computers

• Personal Communication Devices

• Personal Digital Assistants (PDAs)

Typical Application

V IN

C IN

1µF

IN

OUT

IN AAT4280A

ON

ON/OFF

GND GND

GND

4280A.2005.02.1.1

V OUT

C OUT

0.1µF

GND

1

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