The ADM1171 is a 2.7V to 16.5V hot swap controller with current sense output that safely enables a printed circuit board to be removed and inserted to a live backplane.
The ADM1171 hot‑swap controller enables safe insertion and removal of a PCB on a live backplane by using an external N‑channel MOSFET and a current‑sense resistor. It operates from 2.7 V to 16.5 V and includes features such as soft‑start, undervoltage lockout, and a current‑sense output (CSOUT) with a gain of 20.
Two device options are offered: the ADM1171‑1 with automatic retry after an over‑current fault, and the ADM1171‑2 with latch‑off behavior. The device is supplied in an 8‑lead TSOT package and is intended for hot‑swap board insertion in line cards, RAID systems, and industrial high‑side switches.
| Operating Voltage Range (VEE) | 2.7 V to 16.5 V |
|---|---|
| Supply Current (typical) | 0.8 mA |
| Undervoltage Lockout (UVLO) Threshold (typical) | 2.525 V |
| Current Sense Output Gain | 20 |
| Package Type | 8‑lead TSOT (UJ‑8) |
The ADM1171 is a hot‑swap controller that safely enables a printed circuit board to be removed and inserted to a live backplane.
ADM1171‑1 provides automatic retry after an over‑current fault, while ADM1171‑2 provides latch‑off behavior.
It is supplied in an 8‑lead Thin Small Outline Transistor (TSOT) package.
The CSOUT pin provides a gain of 20, multiplying the voltage across the sense resistor.