This document describes the features and characteristics of the ADM1177 hot swap controller and digital power monitor, which allows safe board insertion and removal from a live backplane.
The ADM1177 is an integrated hot‑swap controller with digital current and voltage monitoring via an on‑chip 12‑bit ADC. It controls an external N‑channel FET to limit inrush current and provides programmable timing, soft‑start, and over‑current protection through pins such as TIMER and SS.
The document lists electrical specifications, absolute maximum ratings, thermal characteristics, pin descriptions, typical performance curves, and ordering information for the 10‑lead MSOP package. It also explains I²C interface details, address configuration, and timing parameters for reliable PC‑bus communication.
| Operating Voltage Range (VCC) | 3.15 V to 16.5 V |
|---|---|
| Supply Current (Icc) | 1.7 mA to 25 mA |
| Package | 10‑lead MSOP |
| ADC Resolution | 12‑bit |
| Maximum SCL Clock Frequency | 400 kHz |
| Operating Temperature Range | -40 °C to +85 °C |
| Maximum VCC Pin Rating | 20 V |
The device operates from 3.15 V up to 16.5 V on the VCC pin.
Up to four unique I²C addresses can be created using the ADR pin.
The SCL clock frequency is limited to 400 kHz.
It is supplied in a 10‑lead MSOP package.