Voltage regulators are used as a part of modern-day electricalcircuitry. The purpose of a voltage regulator within a circuit generally is to keep a constant output voltage that is different from the input voltage given to the voltage regulator. In some cases, voltage regulators may also be made to keep voltage throughput constant when the input voltage is variable, but the device being powered requires a constant voltage instead. Voltage regulators are an important part of the safe and continued function of a circuit or device. Excessive voltage can be damaging to a device’s internal circuitry, and can fry sensitive components like motherboards and microcontrollers, in devices that have such components inside them. For that reason, almost every advanced device on the market today will use some form of voltage regulation inside it.