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IC Voltage Regulator
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Introduction IC voltage regulators are versatile and relatively inexpensive and are available with features such as a programmable output, current-voltage boosting, internal short-circuit current 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 protection 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 elements 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 …….
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