What is the primary function of a power supply regulator?

The primary function of a power supply regulator is to regulate the output voltage. This device ensures that the voltage output remains stable and constant, despite variations in input voltage or load conditions. By maintaining a fixed output voltage, the regulator protects sensitive electronic components from voltage fluctuations that could cause malfunctions or damage.

This regulation process typically involves adjusting the resistance or impedance in response to changes in the system, so that the voltage delivered to the load remains at the desired level. Without a regulator, fluctuations in voltage could lead to unpredictable operation or even failure of electronic circuits.