Pin-capacitor spacing as a design guide to power delivery networks

A novel approach for evaluating the efficiency of decoupling capacitors is proposed for power delivery networks (PDN). The method relies on the spacing measured from a device reference point to the nearest capacitor and can be used as a guide for the placement and optimization of local decoupling capacitors on chip, package or PCB medium. Simple relations are developed including the mutual interaction between components and their accuracy is validated by a case study.