DCDC converter, DCDC conversion method and electronic equipment

The invention discloses a DCDC converter, a DCDC conversion method and an electronic device, which can provide a dynamically controlled load threshold and distinguish a load threshold when entering a light load mode and a load threshold when jumping out of the light load mode. The DCDC converter comprises an error amplification module, a pulse width modulation wave generation module and a cross-period module, the cross-period module is used for obtaining an input voltage, an output voltage and a sampling voltage and outputting a high cross-period signal when the sampling voltage is larger than a second reference voltage so as to turn off the pulse width modulation wave generation module, and the pulse width modulation wave generation module generates pulse width modulation waves. Therefore, the frequency of the pulse width modulation wave output by the pulse width modulation wave generation module is reduced; the pulse width modulation wave generation module is used for outputting a forced duty ratio to raise