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In this regard, there are two very common types of power supply, the linear and the switched mode. The main difference between the two is the way they operate.Linear power supplies provide a constant voltage at all times while the power provided by a switched mode power supply constantly varies. linear power supply is often used because of its simplicity. Linear regulators exist in packaged ICs that only need a rectified voltage source to operate. In comparison, a switched mode power supply is very complex and requires a handful of ICs as well as inductors.
In these cases, a low-dropout (LDO) linear regulator is generally used as a low-cost, high-accuracy, and easy-to-implement power supply solution. However, a switch-mode power supply (SMPS) more easily meets other possible system design goals such as efficiency and battery run time.Differences Between LDOs And SMPSs.n these cases, a low-dropout (LDO) linear regulator is generally used as a low-cost, high-accuracy, and easy-to-implement power supply solution. However, a switch-mode power supply (SMPS) more easily meets other possible system design goals such as efficiency and battery run time. Differences Between LDOs And SMPSs.