The voltage regulator is a helpful and most common IC building block next to the op amp. The monolithic form of a voltage regulator has replaced the discrete version because of their advantages. The monolithic voltage regulator is uniquely suited for local regulation.
Therefore IC voltage regulators are invariably used now a day in almost all voltage regulators.
The integrated circuit (IC) voltage regulator is an electronic integrated device which gives a constant voltage in any case of changes in the load circuits.
The output voltage is regulated by the internal circuit so that it is comparatively independent of the current drawn by the load, the line or supply voltage and ambient temperature.
An IC based voltage regulator can be classified in different ways. A common type of classification is three terminal voltage regulator and five or multi terminal voltage regulator.
Another popular way of classifying IC voltage regulator is by identifying them as linear voltage regulator and switching voltage regulator.
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