Power electronic equipments reliable and stable operation, dc supply should be regulated. The regulation can be performed using buck, boost, Cuk, Flyback regulators. Except single phase rectifier with resistive load all other rectifiers input currents are non-sinusoidal in nature. This front end current distortion of rectifier converter leads to low power factor, high THD, distribution system losses, neutral harmonic currents, over rated power equipments in a power system. The paper is to develop a Sepic regulator with improved input current quality for low THD and good power factor to ensure better performance for the system.