Three-terminal voltage regulator, there are two main, one output voltage is fixed, called fixed output three-terminal voltage regulator, the other output voltage is adjustable, called adjustable output three-terminal voltage regulator, its basic principle is the same, all use series type voltage regulator circuit. In the linear integrated regulator, because the three-terminal regulator has only three exit terminals, it has the advantages of few external components, easy to use, stable performance, low price and so on, so it is widely used.
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