A Switch Mode Power Supply (SMPS) is an advanced power conversion device designed to efficiently convert electrical power from one voltage level to another while minimizing energy loss. Unlike traditional linear power supplies, which regulate output voltage through linear regulation, an SMPS uses high-frequency switching techniques to control power flow. The key components of an SMPS include a switching transistor, an inductor or transformer, and a control circuit. The switching transistor rapidly turns on and off, regulating the voltage and current to achieve the desired output. This method is highly efficient, as it reduces energy dissipation in the form of heat, resulting in smaller, lighter, and more compact power supplies. SMPS units are widely used in various applications, including computers, telecommunications equipment, and industrial machinery, due to their efficiency, reliability, and versatility. They offer stable and adjustable output voltage, high power density, and the ability to operate over a wide range of input voltages, making them ideal for modern electronic devices and systems.