AAT4608
Current Limited Load Switch in SOT-23 Package
General Description
The AAT4608 SmartSwitch鈩?is a member of
AnalogicTech's Application Specific Power
MOSFET鈩?(ASPM鈩? product family. It is a 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, mak-
ing it ideal for both 3V and 5V systems. An inte-
grated current-limiting circuit protects the input sup-
ply against large currents which may cause the sup-
ply to fall out of regulation. The AAT4608 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 1 A. Current limit
threshold is programmed with a resistor from SET to
ground. The quiescent supply current is typically a
low 15碌A(chǔ) max.
The AAT4608 is available in a 5 pin SOT-23 spec-
ified over -40 to 85擄C.
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:
<1碌s response to short circuit
Low quiescent current
鈥?15碌A(chǔ) typical
鈥?1碌A(chǔ) max with Switch off
160m鈩?typical R
DS(ON)
Undervoltage Lockout
Thermal shutdown
Temp range -40 to 85擄C
4kV ESD Rating
5 pin SOT-23 package
Preliminary Information
Applications
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Peripheral ports
Notebook computers
Personal communication devices
Hot swap supplies
Typical Application
INPUT
5
IN
AAT4608
SOT-23
1
OUTPUT
OUT
3
SET
GND
1碌F
2
R
SET
0.47碌F
GND
GND
4608.2001.10.0.9
1
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