Designing a programmable isolated DC-DC converter that stands out from others in the literature due to its high output accuracy is the main goal of this master's thesis. The converter is made to work with a variable input voltage value and will produce a variable output voltage through the use of a microcontroller that will alter the reference voltage via DAC. Understanding the provided specification is the first step in the work flow chart. Next, the best topology and control loop design are chosen, and finally, the created schematic is verified by simulation.