Hot swap controller with I²C fault reporting
The ADM1171-2AUJZ-RL7 from Analog Devices is a single-channel hot swap controller designed for general-purpose board-level power management. It integrates an I²C interface for fault reporting and a latched fault output, plus under-voltage lockout (UVLO) to prevent operation below the supply threshold. The part operates from 2.7 V to 16.5 V and draws 650 µA quiescent current — low enough to keep the power budget tight in multi-rail systems. Programmable current limit, fault timeout, and turn-on voltage let you tune the inrush and fault response without external components beyond the sense resistor and pass FET.
Supply range and temperature grade
The 2.7 V to 16.5 V supply range covers common intermediate rails without needing a separate bias regulator. The -40°C to 85°C operating temperature range suits industrial and telecom environments where the board sees ambient heat from adjacent power stages or outdoor cabinet cycling.
No internal switch — external FET required
This controller has no internal pass switch; it drives an external N-channel MOSFET. That means the current rating is set by the FET and sense resistor you choose, not by the controller itself.
Lifecycle and compliance
The ADM1171-2AUJZ-RL7 carries an Active lifecycle status and is ROHS3 compliant. No end-of-life notice or last-time-buy window is indicated.