LTC1646CGN#PBF - Hot Swap Controller from Linear Technology

The LTC1646CGN#PBF is a sophisticated hot swap controller designed by Linear Technology to provide safe board insertion and removal from a live backplane. This integrated circuit is specifically engineered to control the power supply to plug-in boards and prevent glitches on the power bus when boards are either inserted or removed. The LTC1646CGN#PBF is housed in a compact 16-pin SSOP package, making it suitable for space-constrained applications.

One of the standout features of the LTC1646CGN#PBF is its ability to independently control the main 5V and a secondary supply voltage, which can be adjusted from 2.7V up to 12V. This flexibility allows the chip to be used in a variety of applications, ensuring compatibility with different system requirements. The device offers an adjustable current limit, which provides protection against overcurrent conditions, and a circuit breaker function that protects both the load and the power source.

The LTC1646CGN#PBF includes a precise electronic circuit breaker that utilizes an internal charge pump to enhance the gate voltage of an external N-channel MOSFET, providing a low on-resistance path during normal operation. In the event of an overcurrent condition, the LTC1646CGN#PBF responds quickly to disconnect the load, helping to prevent damage to the board and other components.

This hot swap controller also features a timer-controlled fault current circuit breaker with an adjustable delay, allowing designers to set the desired response time to overcurrent events. Additionally, the LTC1646CGN#PBF provides an under-voltage lockout function, which ensures that the power supply remains off if the input voltage drops below a safe threshold, further enhancing the protection of the system.

With a wide operating temperature range and robust protection features, the LTC1646CGN#PBF is an excellent choice for managing hot-swap events in telecom systems, server backplanes, and other complex electronic systems where uptime and reliability are critical. Its combination of control, protection, and flexibility makes it a valuable component in maintaining system integrity and prolonging the life of electronic equipment.