The NX5P2553 is a precision adjustable current-limited power
switch. The device includes under voltage lockout, over-current, over-temperature, and
reverse bias protection circuits designed to automatically isolate the switch terminals
when a fault condition occurs. The device features two power switch terminals, one input
(VIN) and one output (VOUT); a current limit input (ILIM) for defining the over-current
limit; an open-drain fault output (FAULT) to indicate when
a fault condition has occurred and an enable input (EN) to control the state of the
The over-current limit threshold can be programmed to between 85 mA and 1.8 A using an
external resistor between the ILIM and GND pins. The device has built in soft start.
This feature controls the output rise time, minimizing current surges when the switch is
Designed for operation from 2.5 V to 5.5 V, it is used in power domain isolation
applications to protect from out of range operation. The enable input includes
integrated logic level translation making the device compatible with lower voltage
processors and controllers.