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IC Voltage Regulator
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Introduction
IC voltage regulators are versatile and relatively inexpensive and
are available with fea tures such as a programmable output,
current-voltage boosting, internal short-circuit cur rent limiting,
thermal shutdown, and floating operation for high voltage
applications
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Voltage Regulator
Voltage regulators comprise a class of widely
employed ICs.
Regulator IC units contain the circuitry for
reference source, comparator amplifier, control
device, and overload pro tection all in a single IC.
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IC Voltage Regulator Block Diagram
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Voltage Regulators Except for the, switching regulators, all other types
of regulators are linear regulators.
The impedance of the active element of the linear
regulator provide a desired current to the load,
on the other hand, in a switching regulator.
A switch is turned on and off at a rate such that the
regulator provides the desired average current in
periodic pulses to the load.
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Voltage Regulator internal Animation
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Fixed voltage Regulator
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IC Voltage Regulator types
Fixed output voltage regulators: positive and/or
negative output voltage.
Adjustable output voltage regulators: positive or
negative output voltage.
Switching regulators.
Special regulators.
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Switching Regulators
The switching regulators are more efficient than the
linear regulators.
This is because there is negligible power dissipation
in switching ele ments in either the on or off state.
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Switching Regulator circuit
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Fixed output voltage Regulator
The fixed voltage regulator has an unregulated dc
input voltage Vin, applied to one input terminal,
a regulated output dc voltage, Vout from a
second terminal, with the third terminal connected
to ground.
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Fixed output voltage Regulator
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Adjustable output voltage Regulator
The adjustable voltage regulator implies that the
input voltage must be at least 2 V greater than
output voltage i.e. input voltage must be at least 7
V, because its output voltage is 5 V.
New devices can supply load current from 100 mA
to more than 5 A.
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Adjustable output voltage Regulator
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Special Regulators
The special regulators are employed as control
circuits in pulse width modulation, push-pull
bridges, and series type switch mode supplies.
Almost all power supplies make use of some type
of voltage regulator IC
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Special Regulator
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The End
……. Thank You …….