LTC1422IS8#TRPBF - Hot Swap Controller from Linear Technology

The LTC1422IS8#TRPBF is a sophisticated integrated circuit designed by Linear Technology, now part of Analog Devices, for managing hot-swapping of boards in high-availability systems. This hot swap controller enables safe insertion and removal of circuit boards from a live backplane without causing any disruption to the operation of the existing system. It is particularly useful in applications such as servers, RAID systems, and telecommunications equipment where system uptime is critical.

Housed in a narrow SO-8 package, the LTC1422IS8#TRPBF is engineered to control the power supply to the electronic components on a board as it is inserted into a live backplane. It operates by gradually ramping up the board supply voltage, thereby limiting the inrush current to prevent any glitches or disturbances to the bus voltage. This controlled ramp-up ensures that the power supply and other components on the board are protected from the stress of sudden power application.

The device features an adjustable current limit, which can be set via an external resistor. This allows for precise control over the maximum current that the board can draw, protecting both the board and the backplane from overcurrent conditions. Additionally, the LTC1422IS8#TRPBF offers an adjustable supply ramp rate, which can be tailored to meet the requirements of various applications.

For enhanced protection, this hot swap controller includes an under-voltage lockout that ensures the device remains off until the supply voltage reaches a safe level. It also provides a fault output that signals when the device is in an overcurrent limit or has encountered a fault condition, allowing for external intervention or system alerts.

The LTC1422IS8#TRPBF operates over a wide temperature range, making it suitable for industrial environments. Its robust design and comprehensive set of features ensure reliable operation and protection for sensitive electronic equipment during hot-swap events, making it an indispensable component for systems that demand continuous operation and serviceability.