AAT4280A_0511 Datasheet, PDF (1/14 Pages) Advanced Analogic Technologies – Slew Rate Controlled Load Switch

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 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 compatible 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 cir-
cuit when the switch is disabled. 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 qui-
escent supply current is very low, typically 25nA.
The AAT4280A is available in a Pb-free, 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 R_DS(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.2005.11.1.3
V _OUT
C _OUT
0.1µF
GND
1