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AAT4282A

Slew Rate Controlled Load Switch

Advanced Analogic Technologies 

SmartSwitchTM

General Description

The AAT4282A SmartSwitch™ is a member of AnalogicTech’s

Application Specific Power MOSFET™ (ASPM™) product

family. The AAT4282A is a dual P-channel MOSFET power

switch designed for high-side load-switching applications.

Each MOSFET has a typical RDS(ON) of 60mΩ, allowing

increased load switch current handling capacity with a low

forward voltage drop. The device is available in three dif-

ferent versions with flexible turn-on and turn-off charac-

teristics – from very fast to slew-rate limited. The stan-

dard 4282A (-1) version has a slew-rate limited turn-on

load switch. The AAT4282A (-2) version features fast

turn-on capability, typically less than 500ns turn-on and

3μs turn-off times. The AAT4282A (-3) variation offers a

shutdown load discharge circuit to rapidly turn off a load

circuit when the switch is disabled. An additional feature

is a slew-rate selector pin which can switch between fast

and slow slew rate.

All the AAT4282A load switch versions are designed to

operate from 1.5V up to 6.5V, making them ideal for

both 3V and 5V systems. Input logic levels are TTL and

2.5V to 5V CMOS compatible. The quiescent supply cur-

rent is a very low 1μA.

The AAT4282A is available in the Pb-free, low profile

2.0x2.0mm FTDFN22-8 package and is specified over

the -40 to 85°C temperature range.

Typical Application

PRODUCT DATASHEET

AAT4282A

Slew Rate Controlled Load Switch

Features

• VIN Range: 1.5V to 6.5V

• Low RDS(ON)

▪ 60mΩ Typical @ 5V

▪ 140mΩ Typical @ 1.5V

• Slew Rate Turn-On Time Options

▪ 1ms

▪ 0.5μs

▪ 100μs

• Fast Shutdown Load Discharge Option

• Low Quiescent Current

▪ Typically 1μA

• TTL/CMOS Input Logic Level

• Temperature Range -40°C to 85°C

• FTDFN22-8 Package

Applications

• Cellular Telephones

• Digital Still Cameras

• Hotswap Supplies

• Notebook Computers

• PDA Phones

• PDAs

• PMPs

• Smartphones

INA

INB

C1

1μF

INA

OUTA

ON/OFF

INB

OUTB

ENA AAT4282A

C2

1μF

ON/OFF

FAST/ SLOW

ENB

FAST

GND

N/C

OUTA

OUTB

C3

0.1μF

C4

0.1μF

4282A.2008.02.1.2

www.analogictech.com

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