Switching regulator and the operation control method thereof

An inductor having a non-isolated type switching regulator, comprising: a switching element; rectifying element; error amplifying circuit part amplifying a voltage difference between the feedback voltage and the first reference voltage and an error voltage output; a first voltage comparing circuit portion, a voltage comparator for performing error voltage and a ramp voltage and generates and outputs a first comparison signal, the ramp voltage changing perform a preset voltage, the error voltage is switched in synchronization with the switching element; a second voltage comparing circuit, the error voltage and the second performing voltage comparison voltage reference and generates and outputs a second comparison signal; oscillation circuit section based on the second comparison signal and starts oscillation and generating an output clock signal; and a control circuit part, the switching element is performed based on the clock signal and the first comparison signal switching control.