SmartSwitch
™
General Description
The AAT4682 Dual Electronic Resettable fuse is
part of the AnalogicTech Application Specific Power
MOSFET(ASPM™) line of products. It has two 1A
current limited P-channel MOSFET power devices
that remain fully enhanced as long as the input
power supply is above an under voltage lockout
threshold, and the load is below the current limit
setting. If the load increases above the current limit
setting, as is the case during a short circuit, the
MOSFET effectively becomes a constant current
source equal to the current limit. If the current limit
condition persists long enough to heat the MOSFET
to an extreme temperature, both devices will ther-
mal cycle off and on until the current limit condition
is removed. Independent open drain FAULT flags
signal an over current or over temperature condi-
tion. Quiescent current typically is a low 10µA.
The AAT4682 is available in a 6 pin SOT-23, spec-
ified over a -40 to 85°C temperature range.
Features
• Dual P-Channel MOSFETS
• 500mAsteady state load current
• 600mAminimum current limit trip point
• Low quiescent current, typically 10µA.
• Over temperature protection
• Fast transient response:
• < 1µs response to short circuit
• 400mΩ typical R
DS(ON)
• Undervoltage Lockout
• Temp range -40 to 85°C
• FAULTflag with 2ms blanking
• 6-pin SOT23 package
Applications
• USB ports
• Peripheral ports
• Desktop PCs
• Cell phone ports
AAT4682
Dual Electronic Resettable Switches
Typical Application
C
OUTA
1µF
IN
C
IN
1µF
FAULTA
OUTA
GND
AAT4682
5
2
6
INPUT
GND GND
OUTA
FAULTA
FAULTB FAULTB
OUTB
4
OUTB
C
OUTB
1µF
3
1
Preliminary
Information
4682.2001.11.0.9 1