LTC4218 is a Hot Swap controller that allows a board to be safely inserted and removed from a live backplane. Its features include a wide operating voltage range, adjustable current limit, current monitor output, adjustable current limit timer, overvoltage, undervoltage and powergood monitoring, etc.
The LTC4218 is a hot‑swap controller that safely inserts and removes boards from a live backplane. It includes an internal high‑side switch driver for external N‑channel MOSFETs and offers adjustable current limiting, power‑good monitoring, and over/undervoltage protection.
The manual details electrical characteristics, absolute maximum ratings, pin configurations, functional diagrams, package options, and typical application circuits, helping designers integrate the device into RAID systems, server I/O cards, and other hot‑swap applications.
| Operating Voltage Range | 2.9 V to 26.5 V |
|---|---|
| Current Limit Accuracy | 5 % (15 mV) |
The device operates from 2.9 V up to 26.5 V.
The FLT pin is an over‑current fault indicator; it pulls low when an over‑current fault occurs.
The PG pin provides a power‑good indication; it pulls low when the FB pin drops below 1.21 V.