Provided next is the explanation about the operations of the DC/DC converter having the above described configuration, by referring to FIG. 6. Here, assume that the difference betWeen the input voltage Vin and the output voltage VOW is small, and the inductor current IL moderately ramps up While the sWitch S1 is in an ON state. As is Well
knoWn, the ramp-up speed (slope) of an inductor current is represented by the folloWing equation.