This document describes a simplified SPICE behavioral model for simulating the operation of a DC power supply. The model allows users to specify parameters like rated power, maximum output voltage and current. It represents the power supply's output voltage vs current characteristics within its operating range. The model saves time and costs compared to simulating the full circuit details. Library and symbol files provided with the model need to be copied to the LTspice simulation program folders. Examples are given to demonstrate simulating the power supply's operating area and rated output voltage characteristics.