What this current limiter does
The MAX4785EXK+T is a current limiting IC from Maxim Integrated, designed to protect downstream circuitry by limiting output current to a fixed 50 mA. It operates from a 2.3 V to 5.5 V input supply, covering common 5 V rails used in portable devices, USB peripherals, and industrial sensor interfaces.
50 mA current limit — sizing the load
The 50 mA output rating is the fixed current limit. This is not adjustable — the part is intended for loads that draw up to 50 mA steady-state, with headroom for inrush. Typical applications include USB port power limiting, where a 50 mA limit protects a host port from a shorted peripheral, or as a current limiter on a sensor supply rail in an industrial I/O module. If your load peaks above 50 mA, this part will fold back or latch off depending on the variant; the MAX4785EXK+T is the auto-retry version. Verify your load's peak current stays under the limit to avoid nuisance tripping.