Charge pump circuit and operating method thereof

A method, comprising:

• coupling a first capacitor and a second capacitor in series with each other;
• charging the first capacitor and the second capacitor by turning on a first switch connected between a power voltage and a first end of the first capacitor, and turning on a third switch connected between a first end of the second capacitor and a ground;
• boosting the first capacitor and the second capacitor by turning on a second switch connected between the power voltage and the first end of the second capacitor;
• outputting a first output voltage by turning on a fourth switch connected between the first end of the first capacitor and a first output terminal;
• and
• outputting a second output voltage by turning on a fifth switch connected between a second output terminal and a node between the first capacitor and the second capacitor.

A circuit, comprising:

• a first switch connected to an input power voltage;
• a second switch connected to the input power voltage;
• a first capacitor and a second capacitor connected in series between the first switch and the second switch;
• a third switch connected to the second switch;
• a fourth switch connected to a first output terminal configured to output a first output voltage;
• and
• a fifth switch connected between a second output terminal configured to output a second output voltage and a terminal between the first capacitor and the second capacitor.