LTC4261IGN-2 Negative Voltage Hot Swap Controller

The LTC4261IGN-2 is a sophisticated negative voltage hot swap controller designed by Linear Technology, now part of Analog Devices, to ensure safe board insertion and removal from live backplanes. This compact and efficient controller allows electronic circuit boards to be hot-swapped in systems operating at negative voltages without causing glitches or disruptions to the running system. It is particularly well-suited for telecom and datacom applications where system maintenance and upgrade without power-down is essential for continuous operation.

The device operates over a wide voltage range and is designed to control an external N-channel MOSFET to gently power up capacitive loads, thus preventing sparks, connector damage, and system glitches. It features an adjustable current limit, which provides protection against overcurrent conditions. The LTC4261IGN-2 incorporates a multi-function timer that serves as a circuit breaker to help protect both the load and the power source from prolonged faults.

One of the key features of the LTC4261IGN-2 is its ability to provide a controlled power-up sequence. This is achieved through an adjustable supply ramp, which ensures that the inrush current is managed effectively. Additionally, the product includes a power good output, which signals when the output voltage is within the acceptable range, thus enabling the connection of the load to the power source at the appropriate time.

The LTC4261IGN-2 also has an under-voltage lockout feature that prevents the controller from turning on the MOSFET when the input supply voltage is too low, ensuring safe operation under all conditions. Furthermore, the device is equipped with an overvoltage protection circuit that protects against transients and accidental overvoltage conditions.

Designed for versatility, the LTC4261IGN-2 is available in a 16-pin SSOP package, which is suitable for space-constrained applications. Its robust design and comprehensive feature set make it an ideal choice for managing power distribution in complex systems where reliability and uptime are critical.

Overall, the LTC4261IGN-2 from Linear Technology is a powerful solution for negative voltage hot swap applications, providing the necessary protection and control to enable safe and reliable system maintenance and upgrades.