Fully Integrated Switched-Capacitor Power Converters

Since both switches and capacitors shrink with advanced integrated circuit processes, fully integrated switched-capacitor (SC) power converters become a popular solution for on-chip point-of-load power delivery. This chapter covers the topology design, multiphase and multistate operations, loss analyses, and efficiency optimization considerations for a better fully integrated SC power converter design. Then, we will introduce two SC power converter design examples. The first is a 100+ multiphase ring-shaped fully integrated SC converter that surrounds the load placed in the middle, thus providing high-quality power supply through any edges of the chip. In addition, the first work significantly extended the loop bandwidth with an innovative pseudo-continuous control loop design. The second work is a dual symmetrical SC converter with dynamic power cell allocation, such that the two outputs can efficiently share the power converter cells with higher system efficiency and smaller chip area. This chapter included all design considerations.