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