Semiconductor device having first and second switching regions respectively controlled by first and second control signals output by a controller

A semiconductor device comprising:

• a first switching region including a first gate electrode wherein a channel current of the first switching region is controlled according to an electric charge amount supplied by a first control signal input to the first gate electrode;
• a second switching region including a second gate electrode and connected in parallel with the first switching region wherein a channel current of the second switching region is controlled according to an electric charge amount supplied by a second control signal input to the second gate electrode;
• and
• a control section outputting the first control signal for turning-on the first switching region to the first gate electrode and the second control signal for turning-on the second switching region to the second gate electrode,
• wherein the control section stops outputting the second control signal after a first predetermined period elapses from a start of outputting the first and second control signals, and outputs the second control signal after a second predetermined period elapses from a stop of outputting the second control signal.