The ADM1170 is a hot swap controller that safely enables a printed circuit board to be removed and inserted to a live backplane. It features control of supply voltage ranging from 1.6V to 16.5V, allows protected board removal and insertion with adjustable analog current limit and circuit breaker, soft start control for inrush current profile, peak fault current limited with fast response, charge pumped gate drive for external N-FET switch, automatic retry or latch-off during current fault, and undervoltage lockout.
The ADM1170 hot‑swap controller enables safe insertion and removal of a printed‑circuit board on a live backplane. It uses an external N‑channel MOSFET and a current‑sense resistor to monitor load current, and a charge‑pump to drive the MOSFET gate. When an over‑current condition occurs, the device reduces the gate voltage to limit current and can automatically retry or latch‑off depending on the variant.
The controller operates from 2.7 V to 16.5 V, supports a hot‑swap operating range of 1.6 V‑16.5 V, and provides soft‑start control, UVLO, and a programmable current‑limit via an external sense resistor. It is supplied in an 8‑lead TSOT package and is offered in two options: ADM1170‑1 (automatic retry) and ADM1170‑2 (latch‑off).
| Operating Voltage Range | 2.7 V to 16.5 V |
|---|---|
| Supply Current (typical) | 0.8 mA |
| Undervoltage Lockout Threshold | 2.525 V to 2.65 V |
| Hot‑Swap Operating Range | 1.6 V to 16.5 V |
The ADM1170 is a hot‑swap controller that safely enables a printed‑circuit board to be removed and inserted to a live backplane.
Two options are offered: the ADM1170‑1 with automatic retry for over‑current faults and the ADM1170‑2 with latch‑off for an over‑current fault.
The ADM1170 operates with a supply voltage ranging from 2.7 V to 16.5 V.