Fully integratable 4-phase charge pump architecture for high voltage applications

This paper presents a 4-phase charge pump circuit architecture, which is based on the high voltage CMOS technology with isolated transistor modules from Austriamicrosystems, and can be applied in the applications up to 120V. Due to the introduction of 4-phase clock scheme with dead time techniques, the drawbacks of reverse current at the Pelliconi charge pump are significantly reduced. Correspondingly, the voltage gain and efficiency at each stage are improved. Different configurations of the high voltage sandwich capacitors in this new charge pump architecture are discussed. The feasibility of this proposed charge pump structure is proved by the Post-Layout simulation result.