48V DC Input to 12V Output DC-DC Converter

This DC/DC buck regulator project is based on LMR38020 chip that employs synchronous rectification to achieve high conversion efficiency on a small board. The project operates over a wide input voltage range of 14V to 48V to provide a regulated 12V_dc output at 400kHz switching frequency. The output voltage has better than 1.5% setpoint accuracy. Enable pin is connected to VIN using resistor R2. The device has built-in protection features such as cycle-by-cycle current limit, hiccup mode short-circuit protection, and thermal shutdown in case of excessive power dissipation.