AAT4682
Dual Electronic Resettable Switches
General Description
The AAT4682 Dual Electronic Resettable fuse is
part of the AnalogicTech Application Specific Power
MOSFET (ASPM鈩? 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 10碌A(chǔ).
The AAT4682 is available in a 6 pin SOT-23, spec-
ified over a -40 to 85擄C temperature range.
Features
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SmartSwitch
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Dual P-Channel MOSFETS
500mA steady state load current
600mA minimum current limit trip point
Low quiescent current, typically 10碌A(chǔ).
Over temperature protection
Fast transient response:
鈥?< 1碌s response to short circuit
400m鈩?typical R
DS(ON)
Undervoltage Lockout
Temp range -40 to 85擄C
FAULT flag with 2ms blanking
6-pin SOT23 package
Preliminary Information
Applications
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USB ports
Peripheral ports
Desktop PCs
Cell phone ports
Typical Application
AAT4682
INPUT
5
IN
OUTA
OUTB
FAULTA
GND
2
6
4
1
3
OUTA
OUTB
FAULTA
FAULTB
FAULTB
C
IN
1碌F
GND
C
OUTA
1碌F
C
OUTB
1碌F
GND
4682.2001.11.0.9
1
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