Innovative Decoupling Capacitor Solutions for Power Delivery Improvement on Advanced FPGA Packages

In this paper, the innovative on-package decoupling capacitor (OPD) technique is presented for power delivery network (PDN) design optimizations with next generation Field-Programmable Gate Array (FPGA) for intensive power consumption usage. The paper introduces general on-package decoupling capacitor techniques, compares discrete multi-layer ceramic capacitors with deep trench capacitors, and demonstrates the advantage of deep trench capacitor (DTC) application in optimizing voltage noise in power delivery network. With the proposed DTC methodology, the voltage supply 1st droop at the package C4 bump can be reduced by 5mV in one example compared with MLCC (multi-layer ceramic capacitors) to reach design specifications. An accurate noise simulation methodology and package routing optimization strategy in noise optimization are essential to an efficient system evaluation and demonstrated in this paper.