This document introduces the Analog Devices ADM1178 Hot Swap Controller and Digital Power Monitor, which can safely insert and remove circuit boards from a live backplane and control supply voltages from 3.15V to 16.5V.
The ADM1178 is an integrated hot‑swap controller and current‑sense amplifier that provides digital current and voltage monitoring via an on‑chip 12‑bit ADC. It controls an external N‑channel FET to limit inrush current and protect the power path during board insertion and removal.
The document includes functional block diagrams, pin descriptions, electrical specifications, thermal characteristics, and application guidelines such as Kelvin sense resistor connections and ALERTB output usage.
| Operating Voltage Range (VCC) | 3.15 V to 16.5 V |
|---|---|
| Supply Current | 1.7 mA to 25 mA |
| Undervoltage Lockout Threshold | 2.8 V |
| ADC Resolution | 12‑bit |
| Package Type | 10‑lead MSOP |
| Maximum VCC Pin Rating | 20 V |
| ALERTB Output Low Voltage | 0.05 V |
The device supports I²C fast‑mode operation up to 400 kHz.
The ADM1178 is supplied in a 10‑lead MSOP package.