What is the function of a voltage regulator?

The function of a voltage regulator is to maintain a constant output voltage regardless of fluctuations in input voltage or variations in load current. This is essential for protecting sensitive electronic components from damage that can occur due to overvoltage or undervoltage conditions. A reliable and stable voltage is crucial for the proper operation of electronic devices, ensuring they perform optimally and reducing the risk of failure.

In many applications, voltage regulators automatically adjust the output to keep it steady, making them an integral part of power supply circuits. They are commonly found in power supply units for computers, batteries, and other electronic devices where stable operation is vital.