The LT4220 is a dual voltage hot swap controller from Linear Technology Corporation that supports positive and negative two-way power, has overcurrent limiting, power tracking, and switch tube shutdown functions, and is used in RAID systems, –5.2V ECL power supplies, industrial controls, and other scenarios.
The LT4220 is a 16‑pin dual‑voltage Hot‑Swap controller that enables safe insertion and removal of boards from a live backplane. It supports positive and negative supplies from 2.7 V to 16.5 V and –2.7 V to –16.5 V, with adjustable ramp rates and a tracking mode for simultaneous supply control.
The device includes fold‑back current limiting, automatic retry or latch‑off after a fault, and open‑collector power‑good comparators. It is supplied in a narrow 16‑lead SSOP package and is intended for applications such as live board insertion, RAID systems, industrial controls and split‑supply designs.
| Positive supply voltage range (Vec) | 2.7 V to 16.5 V |
|---|---|
| Negative supply voltage range (Vee) | -2.7 V to -16.5 V |
| Operating temperature range | 0 °C to 70 °C |
| Package type | 16‑lead narrow SSOP |
| Number of pins | 16 |
The positive supply (Vec) can operate from 2.7 V up to 16.5 V.
The LT4220 is supplied in a 16‑lead package.
It is offered in a 16‑lead narrow SSOP package.
The device operates from 0 °C to 70 °C.