Addressing PCB effects in the design of a buck converter

The design parameters of a buck converter are investigated based on ac small-signal design parameters such as open-loop, input-to-output and control-to-output transfer functions including distributed circuit parameters that account for PCB parasitics. It is demonstrated that the PCB effects neglected in a 2^nd order model could affect the design parameters such as selection of switching frequency. The relations developed in this work are validated in the power design of an idustrial circuit and compared to the conventional 2^nd order models.