AAT4680 Datasheet, PDF (1/10 Pages) Advanced Analogic Technologies – Electronic Resettable Fuse

General Description
The AAT4680 electronic resettable fuse is a mem-
ber of AnalogicTech’s Application Specific Power
MOSFET™ (ASPM™) product family. 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
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 cur-
rent source equal to the current limit. If the current
limit condition 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 condi-
tion. Quiescent current is typically a low 10µA.
The AAT4680 is available in a Pb-free, 5-pin
SOT23 package and is specified over the -40°C to
+85°C temperature range.
AAT4680
Electronic Resettable Fuse
Features
SmartSwitch^™
• 500mA Steady State Load Current
• 600mA Minimum Current Limit Trip Point
• Low Quiescent Current: Typically 10µA
• Over-Temperature Protection
• Fast Transient Tesponse:
— <1µs Response to Short Circuit
• 400mΩ Typical R_DS(ON)
• Under-Voltage Lockout
• FAULT Flag with 3ms Blanking
• 5-Pin SOT23 Package
• Temperature Range: -40°C to +85°C
Applications
• Cell Phone Ports
• Desktop PCs
• Peripheral Ports
• USB Ports
Typical Application
INPUT
C_IN
1μF
GND
5 _IN
OUT ¹
AAT4680
FAULT ³
GND
2
FAULT
OUT
C_OUT
1μF
GND
4680.2006.05.1.2
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