Voltage regulator TO 220

A voltage regulator can-size TO-220. Also, made in a smaller can-size TO-92.


A voltage regulator is a 3-leg electrical regulator device designed to automatically maintain a constant, regular, unchanging, steady voltage level. A voltage regulator may be a simple "feed-forward" design or may include negative feedback control loops. It may use an electromechanical mechanism, or electronic components. Depending on the design, it may be used to regulate one or more AC or DC voltages.

Electronic voltage regulators are found in devices such as computer power supplies where they stabilize the DC voltages used by the processor and other elements. In automobile alternators and central power station generator plants, voltage regulators control the output of the plant. In an electric power distribution system, voltage regulators may be installed at a substation or along distribution lines so that all customers receive steady voltage independent of how much power is drawn from the line.


Voltage regulator diagram

voltage regulator diagram

In the diagram, the incoming input voltage of +40V but with our voltage regulate we can "regulate" the output to a steady, constant +5V to power our internal IC chips and components. For example, the 7805 series has three leads. If you look at the 7805 from the front (the side with printing on it), the three leads are, from left to right, input voltage (7 to 30 volts), ground is the middle leg, and output voltage (5 volts).



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