Disclosed is a voltage obtaining apparatus. The voltage obtaining apparatus includes a plurality of conversion units, which are connected to each other in parallel and respectively convert charge packets into voltages, and a control unit that controls a timing when the charge packets are respectively input to the plurality of conversion units. The control unit is configured to control the timing so that a corresponding charge packet is input to an nth conversion unit (where n denotes number of the conversion units) at a timing when an operation of an (n−1)th conversion unit is ended.