To suppress the influence of a parasitic capacity and suppress the drop of an output voltage and the increase of power consumption, in the case of forming a boosting circuit on a single board together with other circuit elements.

The boosting circuit is provided with switches S11 and S21 between a contact N11 and a contact N12 which are supplied with a power voltage Vdd and between the contact N11 and a contact N13, a capacitor C1 between the contact N12 and the contact N13, a switches S12, S13, and S22 between the contact N13 and a ground terminal (GND), between the contact N12 and a contact N14, and between the contact N12 and a contact N15, a capacitor C2 between the contact N14 and the contact N15, and switches S23 and S14 between the contact N14 and the ground terminal and between the contact N15 and a load capacitor Cout, and a first connection state where the switches S11-S14 are set to be ON and the switches S21-S23 are set to be OFF, and a second connection state where the switches S11-S14 are set to be OFF and the switches S21-S23 are set to be OFF are set repeatedly.