The ADM1170 is a hot swap controller that safely enables a printed circuit board to be removed and inserted to a live backplane. This is achieved using an external resistor and an internal soft start circuit.
The ADM1170 is a hot‑swap controller that enables safe insertion and removal of printed‑circuit boards on a live backplane. It works with an external N‑channel MOSFET and uses a sense resistor to monitor load current, providing soft‑start, over‑current protection, and undervoltage lockout. Two variants are offered: ADM1170‑1 with automatic retry and ADM1170‑2 with latch‑off fault handling.
The document includes detailed electrical specifications, absolute maximum ratings, thermal characteristics, pin configurations, and typical performance curves. It also lists typical applications such as hot‑swap board insertion for 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 |
| Package Type | 8‑lead TSOT |
The ADM1170 operates from 2.7 V up to 16.5 V.
The ON (ON‑CLR) pin enables the device, can reset a latched fault, and acts as a comparator input with a 1.3 V threshold.
ADM1170‑1 provides automatic retry after an over‑current fault, while ADM1170‑2 latches off and requires the ON (ON‑CLR) pin to reset the fault.