MAX5901NNETT+T

The MAX5901NNETT+T is a hot swap controller IC from Analog Devices / Maxim Integrated, enabling circuit cards to be safely inserted into live backplanes without causing power supply glitches. It operates over a wide voltage range of -9V to -100V and requires only an external n-channel MOSFET. This device limits inrush current during startup and provides overcurrent protection via a circuit-breaker function, monitoring the voltage drop across the external MOSFET's on-resistance. It includes an undervoltage lockout (UVLO) feature, an ON/OFF control input for power sequencing, and a power-good status output. A built-in thermal shutdown protects the external MOSFET from overheating.

The MAX5901NNETT+T offers latched or automatic retry fault management and is available with circuit-breaker thresholds of 200mV, 300mV, or 400mV. It has a quiescent current of less than 1mA and operates within an extended temperature range of -40°C to +85°C. The controller is housed in a space-saving 6-pin TDFN package, suitable for surface mount applications.

Key features include wide operating voltage, external MOSFET drive, inrush current limiting, circuit-breaker functionality, and thermal shutdown. The ON/OFF input allows for load power control and sequencing, while the adjustable undervoltage lockout and power-good output provide system monitoring capabilities. The device supports latching or automatic retry fault management, making it a versatile solution for power management in various electronic systems.