STEF4S Datasheet (STMicroelectronics)

STEF4S, Electronic fuse

The STEF4S is an integrated electronic fuse optimized for monitoring the output current and the input voltage.

It can be connected in series to 3.3 V or 5 V rails, protecting the electronic circuitry on its output from overcurrent and overvoltage.

The operating mode (5 V or 3.3 V) can be selected by

STEF4S Features

* Power MOSFET on-resistance (typ.): 40 mΩ

* Enable function

* Output clamp voltage (typ.): 5.7 V in 5 V mode, and 3.8 V in 3.3 V mode

* Undervoltage lockout

* Short-circuit limit

* Overload foldback current limit

* Controlled soft-start