[National Semiconductor]Linear and Switching Voltage Regulator Fundamentals

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National Semiconductor Chester Simpson
Member of Technical Staff
Power Management Applications
LINEAR VOLTAGE REGULATORS
Introduction
The linear regulator is the basic building block of nearly every power supply used in
electronics.  The IC linear regulator is so easy to use that it is virtually foolproof, and
so inexpensive that it is usually one of the cheapest components in an electronic
assembly.
This paper will present information that gives the user greater understanding of how
a linear regulator works, and will help to de-mystify regulator specifications and
applications.  
Some typical circuits will be presented to highlight the commercial regulators that are
currently available.  The primary focus of the new product examples is in the area of
Low-dropout regulators, which offer great advantages over standard regulators in
many applications.
Linear and Switching Voltage
Regulator Fundamentals

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