Individual step-up circuit, step-up circuit, and electronic apparatus

Abstract

To provide an individual boost circuit capable of boosting a minute power voltage to a target voltage more reliably. An individual boost circuit includes a first PMOS transistor that has a gate to which a first clock voltage is applied and performs on- and off-operations; a second PMOS transistor that has a gate to which a second clock voltage that has a reciprocal relation with the first clock voltage is applied and performs the on- and off-operations; an auxiliary capacitor; a boost capacitor; an auxiliary charging circuitthat charges an auxiliary capacitor via the second PMOS transistor with a power voltage from an external power when the first PMOS translator enters an off-state and the second PMOS transistor enters an on-state; and a boost charging circuitthat charges the boost capacitor via the first PMOS transistor with the second clock voltage through the auxiliary capacitor when the first PMOS transistor enters the on-state and the second switching transistor enters the off-state.