Switch-mode power supplies are a popular choice for DC-DC power conversion. They benefits and tradeoffs when compared to alternative methods of converting DC power. SMPSs can convert a DC input voltage into a different DC output voltage, depending on the circuit topology. A switch-mode power supply can achieve a 90% efficiency or more, depending on load and voltage levels. Although high efficiency is an important advantage with SMPSs, they have other benefits as well. They can have reduced thermal-management requirements. Also, more importantly, their useful life can be increased due to improved reliability, because components are not subjected to excessive heat, as they would be in a less efficient system.
Poll question: What was the intended application the last time you designed a switch-mode power supply?