Hot swap controller for 2.7V to 16.5V rails
The Analog Devices ADM1172-2AUJZ-RL7 is a single-channel hot swap controller designed to manage inrush current and protect the upstream supply during board insertion. It operates from a 2.7V to 16.5V supply and draws 650 µA quiescent current. The part integrates latched fault protection and undervoltage lockout (UVLO), with programmable current limit, fault timeout, and turn-on voltage via external resistors. Housed in a TSOT-23-8 package, it suits general-purpose hot swap applications in industrial control, telecom infrastructure, and power distribution boards where the board must be inserted or removed live without glitching the bus.
Programmable current limit and fault timeout — what it means for the BOM
The ADM1172-2AUJZ-RL7 lets you set the current limit threshold and the fault timeout period with external resistors, not fixed internal values. That means one BOM line covers multiple load currents — a 1 A card and a 3 A card can use the same controller with different resistor values. The UVLO threshold is also programmable, so you can tailor the turn-on voltage to the minimum rail voltage your system guarantees. For a procurement decision, this part reduces SKU count across a product family: one controller, one footprint, multiple current settings.
Active lifecycle — no last-time-buy pressure
The ADM1172-2AUJZ-RL7 carries an active lifecycle status with ROHS3 compliance. For a BOM planner, this means no last-time-buy scramble and no forced redesign for the foreseeable future. The TSOT-23-8 package is a common footprint, so second-sourcing or cross-referencing to a pin-compatible part like the ADM4210-2AUJZ-RL7 is straightforward if supply tightens.
Industrial temperature range and package handling
Rated for -40°C to 85°C, the ADM1172-2AUJZ-RL7 fits outdoor telecom cabinets, factory-floor motor drives, and engine-bay electronics without derating. The TSOT-23-8 package is a thin SOT-23 variant — same 2.9 mm x 2.8 mm footprint as a standard SOT-23-8, but lower profile (1.1 mm max).