AAT4282A Datasheet, PDF (8/14 Pages) Advanced Analogic Technologies – Dual Slew Rate Controlled Load Switch

Functional Block Diagram
INA
ON/OFF A
AAT4282A
Dual Slew Rate Controlled Load Switch
Level
Shift
Turn-On Slew
Rate Control
*
OUTA
FAST /
SLOW
INB
ON/OFF B
Level
Shift
Turn-On Slew
Rate Control
*
OUTB
* AAT4282A-3 version only
GND
Functional Description
The AAT4282A is a family of flexible dual P-chan-
nel MOSFET power switches designed for high-
side load switching applications. There are three
versions of the AAT4282A with different turn-on
and turn-off characteristics to choose from,
depending upon the specific requirements of an
application. The first version, the AAT4282A-1,
has a moderate turn-on slew rate feature, which
reduces in-rush current when the MOSFET is
turned on. This function allows the load switch to
be implemented with either a small input capacitor
or no input capacitor at all. During turn-on slew-
ing, the current ramps linearly until it reaches the
level required for the output load condition. The
8
4282A.2007.09.1.1