# How a zener diode can be used as voltage regulator in reverse bias?

## How a zener diode can be used as voltage regulator in reverse bias?

Zener diodes are commonly used to control the voltage through narrow circuits as voltage references and as shunt regulators. When attached to a variable voltage source in parallel such that it is reverse biased, a Zener diode conducts when the voltage exceeds the reverse breakdown voltage of the diode.

## Why would you use a Zener diode for regulation?

Zener diodes are used mostly to generate reference voltages for other circuits. Voltage regulation is provided by the more efficient, linear IC regulators such as the 7805, which is a series regulator. A zener diode can be tuned to have a very specific “zener” breakdown voltage.

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Can diode be used as voltage regulator?

Voltage regulator diodes utilize the reverse characteristics of a pn junction. Since this breakdown voltage is also called Zener voltage, voltage regulator diodes are also called Zener diodes. This voltage may be used as a constant voltage power supply or a reference voltage for electronic circuits.

### How is a Zener diode connected into a circuit?

The zener diode is connected with its cathode terminal connected to the positive rail of the DC supply so it is reverse biased and will be operating in its breakdown condition. Resistor RS is selected so to limit the maximum current flowing in the circuit.

### Which diode is used as a voltage regulator?

Zener diodes
Zener diodes are widely used as voltage references and as shunt regulators to regulate the voltage across small circuits. When connected in parallel with a variable voltage source so that it is reverse biased, a Zener diode conducts when the voltage reaches the diode’s reverse breakdown voltage.

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Is Zener diode having breakdown voltage equal to 15 volt is used in a voltage regulator circuit?

A zener diode, having breakdown voltage equal to 15 V is used in a voltage regulator circuit shown in figure.

#### Where is Zener diode used?

Zener diodes are used for voltage regulation, as reference elements, surge suppressors, and in switching applications and clipper circuits. The load voltage equals breakdown voltage VZ of the diode. The series resistor limits the current through the diode and drops the excess voltage when the diode is conducting.