As new generations of space grade FPGAs, DSPs, ASICs, memory, and other digital devices enter the market, these new digital devices place unprecedented constraints on power supplies. For the large data and signal processor designs, where the needs for power and/or current become a critical factors, distributed power architecture (DPA) is often the power system of choice to ensure the optimum system performance. This paper presents key design features of a new DC-DC converter where synchronous rectification is incorporated to maximize its efficiency performance addressing the needs for a highly efficient power conversion for spacecraft designs expected to operate reliably in orbits for 15 years or more.