[IEEE 2018 17th IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (ITherm) - San Diego, CA, USA (2018.5.29-2018.6.1)] 2018 17th IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (ITherm) - Design Considerations Based on the Effects of Varying Temperature Conditions on the Efficiency of Size Constrained Electronic Power Supplies for CubeSat Applications