1.8A Current Limited P-Channel Switch
General Description
The AAT4601 SmartSwitch is a member of
AnalogicTech's Application Specific Power MOS-
FET™ (ASPM™) product family. It is a 1.8A current
limited P-channel MOSFET power switch designed
for high-side load switching applications. 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 changes in load current
which could cause the supply to fall out of regula-
tion. The AAT4601 has protection from thermal
overload which limits power dissipation and junction
temperatures. The maximum current limit level will
guarantee that 1.8A can be delivered to the load;
the actual threshold is programmed with a resistor
from the SET pin to ground. The quiescent supply
current is typically 12µA. In shutdown mode, the
supply current decreases to less than 1µA.
The AAT4601 is available in a Pb-free, 8-pin SOP,
TSSOP, or MSOP package and is specified over
the -40°C to +85°C temperature range.
AAT4601
Features
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SmartSwitch
™
Input Voltage: 2.7V to 5.5V
Programmable Over-Current Threshold
Low Quiescent Current
— 12µA Typical
— Less Than 1µA with Switch Off
Only 2.5V Needed for ON Control
Thermal Shutdown
Fault Flag
2ms Fault Blanking
Under-Voltage Lockout
Temperature Range: -40°C to +85°C
4kV ESD Rating
UL Approved—File No. E217765
8-Pin SOP, TSSOP, or MSOP Package
Applications
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Hot Swap Supplies
Notebook Computers
Peripheral Ports
USB Ports
UL Recognized Component
Typical Application
INPUT
100kΩ
8
1
2
IN
IN
FAULT
OUT
6
7
OUTPUT
AAT4601
OUT
SET
5
1µF
ON
3
ON
1µF
R
SET
GND
4
4601.2006.05.1.3
1
AAT [ ADVANCED ANALOG TECHNOLOGY, INC. ]
