AAT4612
Current Limited Load Switch
General Description
The AAT4612 SmartSwitch鈩?is a member of
AnalogicTech's Application Specific Power MOS-
FET鈩?(ASPM鈩? product family. It is a Current
Limited P-channel MOSFET power switch designed
for high-side load-switching applications operating
with inputs ranging from 2.4V to 5.5V which makes it
ideal for both 3V and 5V systems. An integrated cur-
rent-limiting circuit protects the input supply from large
currents which potentially cause the supply to fall out
of regulation. In addition, the AAT4612 thermal over-
load protection limits power dissipation and junction
temperatures associated with prolonged periods of
operation in current limit. Due to its low R
DS(ON)
, the
AAT4612 can be used to control loads that require up
to 1A even while operating at high ambient tempera-
tures. The ultra fast current-limit response to a sud-
den short circuit is a mere 500ns which reduces the
requirements of local supply bypassing. Quiescent
current is a low 10碌A and in shutdown mode, the
supply current decreases to less than 1碌A.
The AAT4612 is available in a 5-pin SOT23, and an
8-pin SC70JW specified over a -40 to 85擄C temper-
ature range.
The AAT4600 Series is a family of adjustable and
fixed SmartSwitch鈩?products with a range of current
handling capabilities. Available are single versions
with adjustable current limit (AAT4610, AAT4601) as
well as fixed current limit (AAT4625), and dual ver-
sions with fixed current limit (AAT4626, AAT4670).
Features
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SmartSwitch
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2.4V to 5.5V Input voltage range
1A current limit trip threshold
Fast transient response:
鈥?<1碌s response to short circuit
Low quiescent current
鈥?10碌A typ
鈥?1碌A max with Switch off
100m鈩?typical R
DS(ON)
Undervoltage Lockout
Thermal Shutdown
Temp range -40 to 85擄C
4kV ESD Rating
5-pin SOT23 package
8-pin SC70JW package
Preliminary Information
Applications
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Peripheral ports
Notebook computers
Personal communication devices
Hot swap supplies
Typical Application
INPUT
5
IN
OUT
1
V
CC
AAT4612
SOT23
C
IN
1碌F
ON
4
ON
GND
2
C
OUT
0.47碌F
GND
GND
4612.2002.1.0.9
1
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