SmartSwitch
™
AAT4610A
Current Limited Load Switch
Preliminary Information
4610A.2003.05.0.92 1
General Description
The AAT4610A SmartSwitch™ is a member of
AnalogicTech™'s Application Specific Power
MOSFET™ (ASPM™) 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 2.4V 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 AAT4610A is also
protected from thermal overload which limits power
dissipation 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 typ-
ically a low 9µA. In shutdown mode, the supply cur-
rent decreases to less than 1µA.
The AAT4610A is available in a 5 pin SOT-23 or 8
pin SC70JW specified over -40 to 85°C.
The AAT4600 Series is a family of adjustable and
fixed SmartSwitch™ with a range of current han-
dling capabilities. Available are single versions in
adj. current limit (AAT4600, AAT4601) as well as in
fixed current limit (AAT4602, AAT4625). Dual ver-
sions (AAT4620, AAT4626) are also available.
Features
• 2.4V to 5.5V Input voltage range
• 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
• Undervoltage Lockout
• Thermal shutdown
• Temp range -40 to 85°C
• 4kV ESD Rating
• UL Approved—File No. E217765
• 5 pin SOT-23 or 8-pin SC70JW package
Applications
• Peripheral ports
• Notebook computers
• Personal communication devices
• Hot swap supplies
UL Recognized Component
Typical Application
AAT4610A
5
4
2
3
1
ON/(ON)
IN
SET
INPUT
GND GND
GND
OUT
SOT-23
OUTPUT
ON (ON)
0.47µF
R
SET
1µF