This file introduces the LT4250, LT4252C and LT4261 high voltage hot swap controllers, which have adjustable surge current limit, short circuit current limit, undervoltage protection and overvoltage protection functions.
This document provides technical specifications and descriptions for a series of High Voltage Hot Swap Controllers manufactured by Linear Technology. The devices are designed to manage power delivery in systems requiring protection against voltage steps and current spikes, operating up to 80V or higher depending on the specific part.
The datasheet covers several models, including the LT4250 (negative hot swap with circuit breaker), LTC4251B/LTC4252C (active current limiting), LT4261 (I2C interface monitoring), and positive voltage variants like the LT4256 and LTC4260. Key features highlighted include adjustable inrush limits, foldback current limiting, undervoltage/overvoltage protection, and various fault handling modes such as latchoff or auto-retry.
| Operating Voltage Range | -48V to 80V (Negative) / +48V (Positive) |
|---|---|
| Package Type (LT4250) | SO-8 |
| Interface (LTC4260/LT4261) | I2C/SMBus |
The negative hot swap controllers operate up to 80V.
The LT4261 and LTC4260 models include an I2C/SMBus interface.