AAT4680

AAT4680 Electronic Resettable Fuse General Description The AAT4680 Electronic Resettable Fuse is part of the AnalogicTech Application Specific Power MOSFET (ASPM™) 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 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, 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, specified over a -40 to 85°C temperature range. Features SmartSwitch™ 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 400mΩ typical RDS(ON) Undervoltage Lockout Temp range -40 to 85°C FAULT flag with 3ms blanking 5-pin SOT23 package Preliminary Information Applications USB ports Peripheral ports Desktop PCs Cell phone ports Typical Application 5 INPUT IN OUT 1 OUT FAULT COUT 1 µF AAT...