Intel® Cyclone® 10 GX Device Design Guidelines

ID 683703
Date 11/06/2017
Document Table of Contents

Decoupling Capacitors

Table 20.  Decoupling Capacitors Checklist
Number Done? Checklist Item
1   Use the PDN tool to plan your power distribution netlist and decoupling capacitors.

Board decoupling is important for improving overall power supply integrity while ensuring the rated device performance.

Cyclone 10 GX devices include on-die decoupling capacitors to provide high-frequency decoupling. These low-inductance capacitors suppress power noise for excellent power integrity performance, and reduce the number of external PCB decoupling capacitors, saving board space, reducing cost, and greatly simplifying PCB design.

Intel has created an easy-to-use power distribution network (PDN) design tool that optimizes the board-level PDN graphically. The purpose of the board-level PDN is to distribute power and return currents from the voltage regulating module (VRM) to the FPGA power supplies. By using the PDN tool, you can quickly arrive at an optimized PDN decoupling solution for your specific design.

For each power supply, PDN designers must choose a network of bulk and decoupling capacitors. While SPICE simulation could be used to simulate the circuit, the PDN design tool provides a fast, accurate, and interactive way to determine the right number of decoupling capacitors for optimal cost and performance trade-offs.