Dc-dc converter

A DC-DC converter, adapted to control a converting circuit to convert an input voltage into an output voltage, wherein the converting circuit comprises a switch module coupled to the input voltage and an LC filter coupled to the switch module to generate the output voltage, the DC-DC converter comprising:

• a system control circuit for generating a switch control signal according to a reference voltage and a state of the LC filter;
• a driver circuit for controlling the switch module according to the switch control signal to adjust the output voltage in response to the reference voltage;
• and
• an output voltage adjusting circuit, coupled to the driver circuit, the output voltage adjusting circuit being configured for determining whether adjusting the output voltage according to an adjusting reference voltage and a detecting voltage being indicative of the output voltage, and if yes, the output voltage adjusting circuit controls the driver circuit to turn on the switch module to adjust the output voltage toward a predetermined adjusting voltage.