Linear Technology LTC4263CDE - Negative Voltage Hot Swap Controller

The LTC4263CDE from Linear Technology is a sophisticated negative voltage hot swap controller designed to enable safe board insertion and removal from a live backplane. This device is particularly well-suited for systems that require negative supply voltages, such as telecommunications equipment, network servers, and data storage systems. The LTC4263CDE is housed in a compact 12-lead DFN package, making it an excellent choice for space-constrained applications.

One of the key features of the LTC4263CDE is its ability to control the gate voltage of an external N-channel MOSFET to gently power up capacitive loads, thereby reducing inrush current and preventing system glitches. The device operates over a wide input voltage range from -16V to -80V, providing versatility for various negative supply voltage requirements.

The LTC4263CDE also incorporates a range of protective features to ensure system reliability. These include overcurrent protection with foldback current limiting, which helps prevent MOSFET damage during overcurrent conditions. Additionally, the device offers overvoltage and undervoltage protection, which ensures the connected load is protected from voltage transients and maintains operation within a safe voltage window.

For enhanced diagnostic capabilities, the LTC4263CDE provides a power good output signal. This feature allows system designers to monitor the health and proper operation of the power supply, facilitating maintenance and troubleshooting. The device also features an adjustable current limit, which can be set by an external resistor, giving designers the flexibility to tailor the current limit to specific application requirements.

The LTC4263CDE's thermal shutdown feature further enhances its safety profile by turning off the MOSFET if the die temperature exceeds the preset threshold, protecting the device from thermal damage. With its robust set of features and protections, the LTC4263CDE is an ideal solution for managing hot swap events in negative voltage environments, ensuring safe and reliable operation.