The ADM1170 is a hot swap controller that allows safe insertion and removal of a board from a live backplane. It controls supply voltages from 0.6V to 16.5V and has a supply voltage range from 2.7V to 16.5V. It features true soft start controls for inrush current profile, adjustable analog current limit with circuit breaker, fast response limits peak fault current, automatic retry or latch-off on current fault, charge pumped gate drive for external N-FET switch, and undervoltage lockout. The ADM1170 is suitable for hot swap board insertion, electronic circuit breaker, and industrial high side switch/circuit breaker.
The Analog Devices ADM1170 is a hot swap controller designed to allow circuit boards to be safely inserted into or removed from a live backplane. It achieves this by controlling the inrush current of supply bypass capacitors using an external N-channel FET, preventing damage to connector pins and system glitches.
The device operates with a supply voltage ranging from 2.7V to 16.5V but can control voltages down to 0.6V via separate SENSE pins. It features true soft start for inrush current profiling, an adjustable analog current limit acting as a circuit breaker, and automatic retry or latch-off functionality depending on the specific model variant.
| Hot Swap Operating Range | 0.6V to 16.5V |
|---|---|
| Supply Current | 0.5 mA typical |
| Operating Temperature Range | -40°C to +85°C |
| Package Type | 8-lead TSOT |
It is a Hot Swap controller that allows a board to be safely inserted and removed from a live backplane.
It limits current by reducing the gate voltage of an external FET, with automatic retry or latch-off depending on the model.
The ADM1170-1 automatically retries for over-current faults, while the ADM1170-2 latches off.