PRODUCT DATASHEET
AAT4282A
SmartSwitch
TM
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 R
DS(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.
Slew Rate Controlled Load Switch
Features
• V
IN
Range: 1.5V to 6.5V
• Low R
DS(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
Typical Application
INA
INA
OUTA
OUTA
INB
ON/OFF
INB
OUTB
OUTB
ENA
AAT4282A
C3
0.1μF
C4
0.1μF
C1
1μF
C2
1μF
ON/OFF
ENB
FAST
GND
FAST/SLOW
N/C
4282A.2008.02.1.2
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