This poses a design challenge for high-end systems which require 100% uptime or which use high cost processors: how to protect the load and to ensure the output continues to regulate if a DrMOS or MOSFET failure occurs. In this video, we will show how the LTC3774 controller can be used in conjunction with Hot Swap™ circuits and ideal diode circuits to meet this challenge. The LTC3774 itself is a dual output buck controller designed to interface with DrMOS devices and utilizes a proprietary current sensing technique, which allows stable operation with submilliohm DCR sensing. It provides an output voltage of 0.6V to 3.5V with an accuracy of ±0.75%, an input voltage range of 4.5V to 38V and a switching frequency range of 200kHz to 1.2MHz.
Mike Shriver – Applications Engineer, Power Products