DC-DC Buck Converter with Adaptive Gain for Improving Line Transient Response

The dc-dc buck converter is widely employed to lower the output voltage below the input voltage, offering low ripples in both current and voltage due to its output filter properties. However, abrupt variations in the input supply voltage can lead to line transients, resulting in significant output voltage fluctuations. These fluctuations can potentially damage downstream equipment and cause disruptions. This study aims to enhance the line transient response of a dc-dc buck converter in voltage mode control. To improve the line transient response of a dc-dc buck converter, this study introduced an additional adaptive gain into the voltage control loop. Simulation results demonstrated that the proposed approach exhibited minimal undershoot and overshoot in the output voltage, even in the presence of variations in the input voltage.