Method and device for correcting DTC delay stepping based on stepping LDO

The invention discloses a method and device for correcting DTC delay stepping based on a stepping LDO. The method comprises the following steps that N digital time converters in a phase-locked loop circuit are connected for oscillation in a negative feedback mode through access control; the minimum working voltage is output to the digital time converter through the stepping LDO circuit; performing timing counting on the output of the digital time converter within a preset time length to obtain counter values when delay control is closed and opened; calculating the stepping precision according to the known reference clock period and the two counter values; judging whether the stepping precision is larger or smaller than a preset value, if the stepping precision is larger than the preset value, increasing the working voltage according to a preset increment, and if the stepping precision is smaller than the preset value, determining that the current working voltage is a target value; and recovering the default p