What Does Voltage Regulator Mean?
A voltage regulator is an electricity regulation device designed to automatically convert voltage into a lower, usually direct current (DC), constant voltage.
Techopedia Explains Voltage Regulator
Voltage regulators are usually used to regulate voltage down to a lower value and to provide this value constantly over time. Such a device could be as simple as a feed-forward design or it could be more complex and include negative feedback loops.