In the present era, the demand for electrical products with optimal efficiency and reliability is paramount. Power electronics-based devices predominantly rely on DC power, necessitating efficient DC-DC converters within power supply systems. This research delves into the development of Delta-Sigma Modulator controlled DC-DC Buck Converters as alternatives to conventional PWM-controlled counterparts. The inherent issue of output voltage ripple due to clock feed-through in PWM approaches is addressed. Beginning with the design of a PWM controller-based DC-DC Buck Converter, the study transitions to explore Delta-Sigma Modulator control, which not only increases overall noise at the output but also shapes and reduces tones present in PWM-controlled systems. Modifications to enhance efficiency and noise performance are pursued, resulting in a design capable of converting 5V to 3.3V at a 200MHz sampling frequency with a peak efficiency of 91%