AAT4292IJQ-T1 ANALOGICTECH [Advanced Analogic Technologies], AAT4292IJQ-T1 Datasheet - Page 8

• Manufacturer Part Number: AAT4292IJQ-T1
• Description: Seven Channel High-Side I/O Expanderimage
• Manufacturer: ANALOGICTECH [Advanced Analogic Technologies]

Functional Block Diagram
Functional Description
The AAT4292 consists of seven P-channel MOSFET power
switches designed for I/O expansion applications. The
device operates with input voltages ranging from 1.8V to
5.5V which, along with its extremely low operating cur-
rent, makes it ideal for battery-powered applications. In
cases where the input voltage drops below 1.8V, the
AAT4292 MOSFETs are protected from entering the linear
region of operation by automatically shutting down.
8
8
SmartSwitch
SmartSwitch
EN/SET
VIN
TM
TM
UVLO
w w w . a n a l o g i c t e c h . c o m
w w w . a n a l o g i c t e c h . c o m
GND
AS
and Level Shift
In addition, the TTL-compatible EN/SET pin makes the
AAT4292 an ideal level-shifted load switch. An optional
slew rate controlling feature eliminates inrush current
when a MOSFET is turned on, allowing the AAT4292 to
be implemented with a small input capacitor or no
capacitor at all, while maintaining isolation between
channels. During slewing, the current ramps linearly
until it reaches the level required for the output load
condition. The proprietary control method works by
careful control and monitoring of the MOSFET gate volt-
Logic Control
2
Cwire Interface
Seven Channel High-Side I/O Expander
Seven Channel High-Side I/O Expander
ROM
PRODUCT DATASHEET
PRODUCT DATASHEET
AAT4292
AAT4292
4292.2008.08.1.0
4292.2008.08.1.0
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7