50A Hot Swap E-Fuse with Guaranteed SOA

The LT4200 is an integrated solution for hot swap applications that allows a board to be safely inserted and removed from a live backplane. The part integrates a hot swap controller, power MOSFET and current sense resistor into a single package for small form-factor applications. The MOSFET safe operating area is production tested and guaranteed for the stresses in hot swap applications.

The LT4200 allows 50A of continuous operation at up to 85°C ambient temperature. It provides separate inrush current control and a ±12% accurate 57A current limit with output dependent foldback. The current limit threshold can be adjusted dynamically using the ISET pin. Additional features include a current monitor output for ground referenced current sensing and a MOSFET temperature monitor output. Thermal limit, overvoltage, undervoltage and power good monitoring are also provided.

APPLICATIONS

* High Availability Servers

* Solid State Drives

* Allows Safe Board Insertion into Live Backplane

* Wide Operating Voltage Range: 2.9V to 15V

* Guaranteed Safe Operating Area: 7.5W√s

* 1.2mΩ MOSFET with Current Sense Element

* ±4% Current Monitor Output

* Adjustable Current Limit Threshold

* Temperature Monitor Output