PRODUCT DATASHEET
AAT4280A
SmartSwitch
TM
General Description
The AAT4280A SmartSwitch is a member of AnalogicTech’s
Application Specific Power MOSFET™ (ASPM™) product
family. The AAT4280A is a P-channel MOSFET power
switch designed for high-side load switching applications.
The device has a typical R
DS(ON)
of 80mΩ, allowing
increased load switch power handling capacity. The device
is available 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 com-
patible with the AAT4250 device, while offering superior
R
DS(ON)
characteristics. The AAT4280A (-2) version fea-
tures fast load switch turn-on capabilities, typically less
than 500ns turn-on and 3μs turn-off times. The AAT4280A
(-3) variation offers a shutdown load discharge circuit to
rapidly turn off a load circuit when the switch is disabled.
The AAT4280A (-4) version features the slowest load
switch turn-on capability, typically greater than 4.0ms
turn-on time. 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 a Pb-free, 8-pin SC70JW
package or a Pb-free, 6-pin SOT23 package and is spec-
ified over the -40°C to +85°C temperature range.
Slew Rate Controlled Load Switch
Features
• 1.5V to 5.5V Input Voltage Range
• Very Low R
DS(ON)
, Typically 80mΩ (5V)
• Slew Rate Limited Turn-On Time Options
▪
4.5ms
▪
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
• 3kV ESD Rating
• SC70JW-8 and SOT23-6 Packages
Applications
•
•
•
•
•
•
•
Cellular Telephones
Digital Still Cameras
Hot Swap Supplies
LCD Panels
Notebook Computers
Personal Communication Devices
Personal Digital Assistants (PDAs)
Typical Application
V
IN
IN
IN
C
IN
1µF
ON
OUT
V
OUT
AAT4280A
GND
GND
C
OUT
0.1µF
ON/OFF
GND
GND
4280A.2008.04.1.5
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