An Efficient Power-Delivery Method for the Design of the Power Distribution Networks for High-Speed Digital Systems

Abstract

In this paper, a new power distribution network (PDN) design method from a power delivery viewpoint is proposed. Two new parameters, the power delivery delay and the DeltaV time constant, are introduced to characterize the effects of the lead inductors and decoupling capacitors on the timely power delivery respectively for a high-speed PDN. The decoupling time of a PDN is accurately estimated from the power delivery delay introduced by the inductance of the discontinuities, the charge delivery speed, and the charge supply capacity of the decoupling capacitors are accurately characterized by the DeltaV time constant. Based on the two parameters, a complete and systematic power-delivery method for the design of a PDN is developed. The proposed design method is verified by SPICE, full-wave simulations, and measurements. For completion, some specific design considerations are also discussed in detail.