Power on/off control circuit and electronic device

A power on/off control circuit, comprising:

• a switching element;
• a first semiconductor switching circuit comprising a first semiconductor switching element having three terminals;
• a second semiconductor switching circuit comprising a second semiconductor switching element having three terminals;
• and
• a holding circuit;
• wherein the switching element is connected to a first terminal of the first semiconductor switching element, and a second terminal of the first semiconductor switching element is connected to the second semiconductor switching circuit, and when the switching element is closed, the first semiconductor switching element is turned on;
• wherein the second terminal of the first semiconductor switching element is connected to a first terminal of the second semiconductor switching element, and when the first semiconductor switching element is turned on, the second semiconductor switching element is turned on, and a power on signal is output via a second terminal of the second semiconductor switching element;
• and
• wherein the holding circuit is connected between the first terminal of the first semiconductor switching element and the second terminal of the second semiconductor switching element, and when the second semiconductor switching element is turned on, the holding circuit is operable to maintain on state of the first semiconductor switching element.