Electric power supply control device and switching electric power supply

An electric power supply control device comprising:

• a control circuit configured to drive an inductor current by turning on or off an upper-side switch and a lower-side switch of a switching output circuit, so as to generate an output voltage from an input voltage;
• an error amplifier configured to compare the output voltage or a feedback voltage corresponding thereto with a predetermined reference voltage, so as to output an error signal including voltage feedback information;
• an information hold unit configured to sample current feedback information corresponding to the inductor current flowing in the lower-side switch during ON period of the lower-side switch, and configured to hold and output the same as a hold signal including the current feedback information during ON period of the upper-side switch;
• and
• an OFF timing control unit configured to respectively receive inputs of the error signal and the hold signal, so as to determine OFF timing of the upper-side switch.