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| AAT4680 Datasheet, PDF (1/8 Pages) Advanced Analogic Technologies – Electronic Resettable Fuse | |||
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General Description
The AAT4680 Electronic Resettable Fuse is part of
the AnalogicTech Application Specific Power MOS-
FET (ASPMâ¢) line of products. It is a 1A current
limited P-channel MOSFET power device that
remains fully enhanced as long as the input power
supply is above an under voltage lockout thresh-
old, 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 condi-
tion persists long enough to heat the MOSFET to
an extreme temperature, the device will thermal
cycle off and on until the current limit condition is
removed. An open drain FAULT flag signals an
over current or over temperature condition.
Quiescent current is typically a low 10µA.
The AAT4680 is available in a 5-pin SOT-23, spec-
ified over a -40 to 85°C temperature range.
AAT4680
Electronic Resettable Fuse
Features
SmartSwitchâ¢
⢠500mA steady state load current
⢠600mA minimum current limit trip point
⢠Low quiescent current, typically 10µA
⢠Over temperature protection
⢠Fast transient response:
⢠< 1µs response to short circuit
⢠400m⦠typical RDS(ON)
⢠Undervoltage Lockout
⢠Temp range -40 to 85°C
⢠FAULT flag with 3ms blanking
⢠5-pin SOT23 package
Applications
⢠USB ports
⢠Peripheral ports
⢠Desktop PCs
⢠Cell phone ports
Typical Application
INPUT
CIN
1µF
GND
5 IN
1
OUT
AAT4680
FAULT 3
GND
2
FAULT
OUT
COUT
1µF
GND
4680.2001.11.0.91
1
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