AAT4608
Current Limited Load Switch in SOT23 Package
General Description
The AAT4608 SmartSwitch is a member of
AnalogicTech's Application Specific Power
MOSFET™ (ASPM™) product family. It is a cur-
rent limited P-channel MOSFET power switch
designed for high-side load switching applica-
tions. This switch operates with inputs ranging
from 2.7V to 5.5V, making it ideal for both 3V and
5V systems. An integrated current-limiting circuit
protects the input supply against large currents
which may cause the supply to fall out of regula-
tion. The AAT4608 is also protected from thermal
overload which limits power dissipation and junc-
tion temperatures. It can be used to control loads
that require up to 1A. Current limit threshold is
programmed with a resistor from SET to ground.
The quiescent supply current is typically a low
15µA max.
The AAT4608 is available in a Pb-free, 5-pin
SOT23 package, and is specified over the -40°C to
+85°C temperature range.
Features
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SmartSwitch
™
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2.7V to 5.5V Input Voltage Range
Programmable Over-Current Threshold
Fast Transient Response:
— <1µs Response to Short Circuit
Low Quiescent Current
— 15µA Typical
— 1µA Max With Switch Off
160mΩ Typical R
DS(ON)
Under-Voltage Lockout
Thermal Shutdown
Temperature Range: -40°C to +85°C
4kV ESD Rating
5-Pin SOT23 Package
Applications
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Hot Swap Supplies
Notebook Computers
Peripheral Ports
Personal Communication Devices
Typical Application
INPUT
5
IN
AAT4608
SOT23
1
OUTPUT
OUT
3
SET
GND
1µF
2
R
SET
0.47µF
GND
GND
4608.2006.03.1.3
1
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
