SmartSwitch
™
General Description
The AAT4250 SmartSwitch™ is a member of
AATI's Application Specific Power MOSFET™
(ASPM™) product family. It is a Slew Rate
Controlled P-channel MOSFET power switch
designed for high-side load-switching applications.
This switch operates with an input voltage range
from 1.8V to 5.5V, making it ideal for 2.5V, 3.3V or
5V systems. The part features 1.5ms turn on and
10µs turn off time. The AAT4250 has an under volt-
age lock out which turns off the switch when an
under-voltage condition exists. Input logic levels
are TTLcompatible. The quiescent supply current
is very low, typically 2µA. In shutdown mode, the
supply current is typically reduced to 0.1µAor less.
The AAT4250 is available in a 5-pin SOT23 and 8-
pin SC70JW specified over -40 to 85°C.
Features
• 1.8V to 5.5V Input voltage range
• 120mΩ (5V) typical R
DS(ON)
• Low quiescent current
• Typical 2µA
• Typical 0.1µAwith Enable off
• Only 2.0V needed for ON/OFF Control
• Temperature range -40º to 85°C
• 5kV ESDrating
• 5-pin SOT23 or SC70JW-8 package
Applications
• Hot swap supplies
• Notebook computers
• Personal communication devices
AAT4250
Slew Rate Controlled Load Switch
Typical Application

AAT4250
SOT23
ON/OFF
IN OUT
GND
ON
1µF0.1µF
INPUT
GND GND
C
IN
C
OUT
OUTPUT
Preliminary
Information
4250.2001.12.0.94 1