DC-DC converter

A DC-DC converter, connected to a direct current power supply, and comprising a PMOS power tube, an NMOS power tube, an energy storage inductor L1, and a filter capacitor C1, wherein the PMOS power tube and the NMOS power tube perform a switching operation respectively according to a frequency of an input signal on a respective gate to perform voltage conversion on a direct current output by the direct current power supply, and the energy storage inductor L1 and the filter capacitor C1 perform voltage stabilization and filter processing on the direct current after the voltage conversion performed by the PMOS power tube and the NMOS power tube, and output the direct current on which the voltage stabilization and the filter processing have been performed, and the DC-DC converter further comprises:

• a triangular wave generation module, comprising a first input terminal and a second input terminal connected to a first end and a second end of the energy storage inductor L1, respectively, and configured to generate a triangular wave signal according to voltages at both ends of the energy storage inductor L1;
• and
• a switch control module, comprising an input terminal connected to an output terminal of the triangular wave generation module and an output terminal connected to both the gate of the PMOS power tube and the gate of the NMOS power tube, and configured to output a control level according to the triangular wave signal to control a switching operation of the PMOS power tube and the NMOS power tube according to a preset switching frequency, wherein the switch control module comprises a slope compensation circuit that generates a slope compensation signal based on the triangular wave signal generated by the triangular wave generation module, wherein a slope value of the slope compensation signal changes with that of a falling edge of the triangular wave signal generated by the triangular wave generation module.