LTC4252-1IMS#TRPBF - Negative Voltage Hot Swap Controller

The LTC4252-1IMS#TRPBF is a sophisticated negative voltage hot swap controller designed by Linear Technology, now part of Analog Devices, to manage the insertion and removal of boards in live backplane systems. This integrated circuit (IC) is engineered to handle a negative supply voltage, making it an ideal choice for telecom and datacom applications where negative supply systems are prevalent.

This hot swap controller allows a board to be safely inserted and removed from a live backplane by controlling the power supplied to the board. It achieves this by limiting the inrush current during insertion, thus preventing glitches on the supply rail that could disrupt the operation of other boards and causing system instability. The LTC4252-1IMS#TRPBF ensures smooth power-up sequencing, which is critical in maintaining system integrity.

The device is housed in a compact 10-lead MSOP package, designated by the part number suffix 'IMS', and is available in tape and reel packaging, indicated by the '#TRPBF' suffix, suitable for automated assembly processes. The LTC4252-1IMS#TRPBF features an array of protective measures, including overcurrent protection, overvoltage protection, and thermal shutdown, which safeguard the electronic system from various fault conditions.

Key features of the LTC4252-1IMS#TRPBF include:

• Operation with supply voltages ranging from -9V to -80V, providing versatility for different negative voltage applications.
• Adjustable overcurrent protection via an external sense resistor, allowing for precise control over the current limit threshold.
• Gate voltage clamped at 15V for MOSFET protection, ensuring the longevity and reliability of the external MOSFET used in the power path.
• Under-voltage lockout with hysteresis, which prevents the system from operating under conditions that could lead to inefficient or unstable performance.
• A power good output, which provides a status signal once the output voltage is within regulated limits, enabling downstream load activation.
• Soft-start capability to minimize inrush current and reduce stress on the system during power-up.

The LTC4252-1IMS#TRPBF is a robust solution for managing power distribution in negative voltage environments, delivering both protection and performance. Its advanced feature set makes it an essential component for high-availability systems where uptime and reliability are paramount.