Driving Charge Pump Circuits

A circuit for driving a switched capacitor converter, comprising:

• a first driver circuit, comprising:
• a first driver having:
• a first supply node coupled to a first voltage source;
• a second supply node coupled to GND and a source of a first transistor of the switched capacitor converter;
• an output coupled to a gate of the first transistor;
• and
• a first capacitor coupled between the first supply and GND;
• a second driver circuit, comprising:
• a second driver having:
• a first supply node;
• a second supply node coupled to a source of a second transistor and the drain of the first transistor of the switched capacitor converter;
• and
• an output coupled to a gate of the second transistor;
• a second capacitor coupled between the first and second supply nodes of the second driver;
• a first unidirectional pass circuit coupled between the first voltage source and the first supply node of the second driver;
• and
• a third driver circuit, comprising:
• a third driver having:
• a first supply node;
• a second supply node coupled to a source of a third transistor and a drain of the second transistor of the switched capacitor converter;
• and
• an output coupled to a gate of the third transistor;
• a third capacitor coupled between the first and second supply nodes of the third driver;
• and
• a second unidirectional pass circuit coupled between the first supply node of the second driver and the first supply node of the third driver.