LTC1421CSW-2.5#TRPBF - Hot Swap Controller from Linear Technology

The LTC1421CSW-2.5#TRPBF is a sophisticated hot swap controller designed by Linear Technology to ensure safe board insertion and removal from a live backplane. This particular component allows a board to be removed or inserted into a live system without causing any disruption to the bus or backplane power supply, which is essential for high-availability systems and critical applications.

Operating with a nominal voltage of 2.5V, the LTC1421CSW-2.5#TRPBF provides a controlled ramp-up of the supply voltage to the load, thereby limiting the inrush current which can cause a voltage drop on the supply line, potentially disrupting the operation of other circuitry on the bus. This feature is particularly useful in sensitive electronic equipment where maintaining a stable power supply is crucial.

Featuring an adjustable current limit, this hot swap controller allows designers to set the maximum amount of current that the board can draw. This is achieved through an external resistor, providing flexibility to accommodate various load requirements. The LTC1421CSW-2.5#TRPBF also includes a circuit breaker function that latches off the pass transistor in the event of a sustained overcurrent condition, protecting both the backplane and the card from damage.

The LTC1421CSW-2.5#TRPBF is equipped with a multi-function timer that serves as a circuit breaker delay, power-up timer, and inrush current duration control. This timer can be adjusted by an external capacitor, allowing designers to optimize the timing characteristics according to their specific application needs.

For added reliability, the device features under-voltage lockout (UVLO) which ensures that the hot swap action does not occur at voltages that are too low to properly power the board. Additionally, the LTC1421CSW-2.5#TRPBF offers an over-temperature protection that shuts down the external MOSFET when the die temperature exceeds safe limits, preventing thermal damage.

Encased in a 16-lead wide body SOIC package, the LTC1421CSW-2.5#TRPBF is designed for easy integration into various system designs. Its tape and reel packaging (denoted by the TRPBF suffix) makes it suitable for automated manufacturing processes, ensuring consistent and efficient production.

In conclusion, the LTC1421CSW-2.5#TRPBF from Linear Technology is a robust and versatile hot swap controller that provides essential protection features for electronic systems requiring hot insertion and removal capabilities. Its adjustable parameters and protective functions make it an ideal choice for a wide range of applications in the telecommunications, data communications, and industrial markets.