Reference Circuit 6029

Ultra-Quiet, 1.8V, 1A Design for the Kintex Ultrascale FPGA

This reference design provides a power-supply circuit with an input voltage of 3.3V, an output voltage of 1.8V, and an output current of 1A using the MAX8869 low-dropout linear regulator. The circuit was developed to power a MGTVCCAUX rail on a Xilinx® Kintex® Ultrascale FPGA. Included in this reference design are a schematic and a bill of materials.

Design Specifications and Setup

  • Input Voltage: 3.3V
  • Output Voltage: 1.8V
  • Output Current: 1A
  • Output-Voltage Ripple: 5mV


Schematic of the MAX8869 linear regulator.
Figure 1. Schematic of the MAX8869 linear regulator.

Hardware Files

Bill of Materials (BOM)

Xilinx and Kintex are registered trademarks and UltraScale is a trademark of Xilinx, Inc.