1-5. What is a linear regulator?

A linear regulator is a type of voltage regulator IC that acts as a variable resistor in response to changes in input voltage or output current in order to maintain output voltage regulation.
There are two types of linear regulators: series regulators and shunt regulators.
A series regulator, as the name implies, is placed in series between a power supply and a load whereas a shunt regulator is placed in parallel between a power supply and a load.

Figure 1.5 series regulators and shunt regulators

Chapter1 Introduction to Low-Dropout (LDO) Regulators

1-1. Types of voltage regulator ICs
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1-2. Advantages and disadvantages of linear regulators and switching regulators
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1-3. What is an LDO regulator?
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1-4. Need of LDO regulators for electronic systems
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1-6. Operations of linear and switching regulators
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1-7. Principle of operation of series regulators
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1-8. Circuit configuration of a series regulator
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1-9. Differences between a three-terminal voltage regulator and an LDO regulator
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