Familiarize Electronic Components Part IX – Voltage Regulators

Voltage Regulators are used to give regulated power to a circuit. Most of the circuits using CMOS devices require well regulated power supply. Zener regulated power supply is simple but less reliable than the power supply using Fixed Voltage regulator IC. 78 XX series ICs are Positive voltage regulators while 79 XX series ICs are  Negative voltage regulatorsLM317 and LM338 are Variable voltage regulators.

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Power regulation using IC

Voltage regulation through Fixed Voltage Regulator IC is the most suitable method.78xx series positive and negative regulators are widely used to get fixed voltage to drive loads. Here explains a circuit design to get regulated voltage from a 12 volt 500 mA power supply .This circuit can deliver 5 volts at 300 mA for driving a load. The circuit is Voltage and Current regulated and with Polarity and Surge protection components.

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