A switching regulator is the most efficient of all voltage regulators with full-load efficiency from about 75 to more than 95 percent.

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Quizplus · Accepted Answer

A switching regulator is indeed the most efficient of all voltage regulators, with full-load efficiency ranging from approximately 75% to over 95%. This is because it uses a switching element (such as a transistor) to rapidly switch the input voltage on and off, which reduces power dissipation and thereby improves efficiency. In contrast, linear regulators dissipate excess power as heat, which makes them less efficient.

A Switching Regulator Is the Most Efficient of All Voltage