The LM51551DSSR is a 2.2-MHz wide VIN nonsynchronous boost, flyback, & SEPIC controller with hiccup 12-WSON -40 to 125 manufactured by Texas Instruments. This part features an integrated 2.2-MHz wide input voltage Non-Synchronous Boost, Flyback & SEPIC controller with a maximum switching frequency of 2.2-MHz. It has a wide input voltage range of 2.5V to 40V and requires a minimum of 10V to maintain normal operation. The LM51551DSSR also features a wide operating temperature range of -40 to 125°C, and built-in hiccup over current protection with adjustable trip thresholds for robust protection of system & components. The device supports a wide variety of output topologies includingFlyback, Boost, Buck-Boost, and SEPIC with a maximum power switch current rating of 8A and maximum current limit of 25A. Additionally, the part includes a built-in power supply supervisory monitor which features adjustable VDD trip points to protect the system from undervoltage conditions.