Bypass capacitance and voltage ripple considerations for resonant switched capacitor converters

Resonant switched capacitor dc-dc converter designs are commonly optimized based on flying capacitance constraints. However, for an actual circuit design, the total available capacitance is further constrained by the need for bypass capacitance at the input and output nodes. This work finds expressions for the voltage ripple and develops a method to optimize the allocation of bypass capacitance so that a circuit designer can make an informed decision about the various trade-offs involving the allocation of capacitance. It will introduce a framework to effectively analyze input and output ripple and then apply this method to different converter topologies.