| 摘要 |
PROBLEM TO BE SOLVED: To suppress variation of output voltage quickly for the load variation.SOLUTION: The control circuit of a switching power supply device includes a first current source which can supply an additional current to a load resistance when the load current flowing through the load resistance of the switching power supply device increases, a second current source which can draw the current from the load resistance when the load current flowing through the load resistance decreases, and an additional current control unit for operating the first current source or the second current source from a point in time when the fact that the variation of the load current flowing through the load resistance has exceeded a predetermined level is detected, to a point in time when the load current flowing through an inductor is equal to the current flowing through the load resistance. |
