What is an SMPS (Switch Mode Power Supply)? SMPS, or Switch Mode Power Supply, is a power conversion device that efficiently delivers the required voltage to various electronic systems. Unlike conventional linear power supplies, SMPS uses high-frequency switching and regulation techniques, which result in better performance, smaller size, and higher energy efficiency. The term “switch mode” refers to the way it controls the output voltage: by rapidly switching on and off at high frequencies. This high-speed operation minimizes power loss and reduces heat generation, making it a highly reliable solution across different industries.