Current Limited Load Switch
General Description
The AAT4610A SmartSwitch is a current limited P-
channel MOSFET power switch designed for high-
side load switching applications. This switch oper-
ates with inputs ranging from 2.4V 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 regulation. The AAT4610A is also pro-
tected from thermal overload which limits power dis-
sipation and junction 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 9µA. In shutdown mode, the supply current
decreases to less than 1µA.
The AAT4610A is available in a Pb-free 5-pin
SOT23 or 8-pin SC70JW package and is specified
over the -40°C to +85°C temperature range.
AAT4610A
Features
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SmartSwitch
™
Input Voltage Range: 2.4V to 5.5V
Programmable Over-Current Threshold
Fast Transient Response:
— 400ns Response to Short Circuit
Low Quiescent Current
— 9µA Typical
— 1µA Max with Switch Off
145mΩ Typical R
DS(ON)
Only 2.5V Needed for ON/OFF Control
Under-Voltage Lockout
Thermal Shutdown
4kV ESD Rating
UL Approved—File No. E217765
5-Pin SOT23 or 8-Pin SC70JW Package
Temperature Range: -40°C to +85°C
Applications
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Hot Swap Supplies
Notebook Computers
Peripheral Ports
Personal Communication Devices
UL Recognized Component
Typical Application
INPUT
IN
AAT4610A
SOT23-5
OUTPUT
OUT
ON (ON)
ON/(ON)
GND
SET
R
SET
0.47μF
1μF
GND
GND
4610A.2006.9.1.3
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AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
