Novel Dual-Output Step Up and Down Switched Capacitor DC/DC Converter
A novel dual-output switched capacitor (SC) DC/DC converter with simultaneous step-up and step- down output voltages was proposed. As well as featuring all merits of classical charge pumps, it features lower-cost and higher-efficiency by using charge capacitor sharing and multiple gain pair techniques. A set of analytical equations were derived to describe its performances and optimize its design. The converter was designed and simulated in 0.35 mum CMOS process with Cadencereg SPECTRE and the simulation results were well consistent with analytical predictions. The errors between them were less than 0.01%-0.33%.