Zener diode voltage regulator circuit. Some common Zener diode breakdown voltages are: 1.8, 3.3, 5.1, 7.5, and 12.6, making them ideal for use in many small circuits. Voltage Shifter 1. In the breakdown region, Zener diode works as a Voltage regulator by adjusting current flowing through it when Voltage across it becomes greater than breakdown voltage Vz. Voltage regulator is a circuit which outputs constant voltage irrespective of the input the voltage. Zener diode is a silicon semiconductor with a p-n junction that is specifically designed to work in the reverse biased condition. Zener Diode Calculator: Enter value and click on calculate. Learn how your comment data is processed. The breakdown voltage of Zener diodes will be constant for a wide range of current. We try to understand how Zener diode works and regulate the voltage. The critical parameter of this type of diodes is the Zener breakdown voltage. Zener Diode is a special purpose PN junction diode its construction is similar to a conventional PN junction diode. This site uses Akismet to reduce spam. 10V. The Zener diode mainly operates in reverse biased condition. As i know Zener Diode used as a voltage regulator in what is so called the Intrinsically safe system ,especially when we have field instrument installed in hazard Area ,So Zener will play the role of fuse protection i.e. \$\begingroup\$ @JerryCoffin: A linear regulator following a switching regulator to reduce noise is only "special," not "very special. The Zener diode is often used to create a reference voltage. And what is the avalanche breakdown? 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Operating Temperature: to +175°C Storage Temperature: +175°C DC Power … What is Voltage Regulator.2. Some of the important applications of a Zener Diodes are as a Voltage Regulator or Stabilizer, as a Meter Protector and as a Wave-Shaper.They are discussed below in detail. What are passive components? Circuit of Zener One Zener Diode connected with one resistence and battery. This is arguably the most common application of zener diodes. When the zener diode is operated in the breakdown or zener region, the voltage across it is substantially constant for a large change of current through it. How they are Classified. Zener Diode as Voltage Regulator. Zener Diode & Zener Voltage Regulator Calculator Formulas and Equations for Zener Diode & Zener Voltage Regulator Calculator Series Current IS= VIN – VZ / .. 5. This particular zener diode in use has a breakdown voltage of 5.1V. 10V. The circuit connection is shown in fig(5). will keep the voltage within safe limits below 24VDC . Zener diode as a voltage regulator: Zener diode is used as a Shunt voltage regulator for regulating voltage across small loads. After breakdown Zener diode operates in the breakdown region. This indicates that breakdown has occurred this breakdown voltage is known as Zener breakdown voltage Vz. Zener diode is mostly used in voltage regulator. 4V. A Zener diode of break down voltage \ (V_Z\) is reverse connected to an input voltage source \ (V_I\) across a load resistance \ … Then you have the situation you have described. The voltage regulator we use is made up of a zener diode and a pass-through transistor. This current flows due to thermally generated minority carriers.At a certain value of reverse Voltage, current will increase suddenly and sharply. For most small scale electronics, the power consumption is (is or at least could be with better design) very low. After reverse breakdown current must be controlled by connecting a resistor in series with the Zener diode this is very important to avoid damage to the diode due to heating.The load is always connected in parallel with the Zener diode so that the voltage across the load is equal to Zener voltage Vz. Analog Electronics: Zener Diode as Voltage Regulator (Input Voltage & Load Resistance Fixed)Topics Covered:1. | 5G technology, Communication technology generations in Mobiles, Electronics components type and explanation | Electronics components, What are Active components electronics? 1. Zener Diodes have a sharp reverse breakdown voltage and breakdown voltage will be constant for a wide rang of currents. When forward biased, it behaves like a normal signal diode, but when the reverse voltage is applied to it, the voltage remains constant for a wide range of currents. Zener diode is connected parallel to the load to make it reverse bias and once the Zener diode exceeds knee voltage, the voltage across the load will become constant. 6V. The function of a regulator is to provide a constant output voltage to a load connected in parallel with it in spite of the ripples in the supply voltage or the variation in the load current and the zener diode will continue to regulate the voltage until the diodes current falls below the minimum IZ(min) value in the reverse breakdown region. 4.) For those times when you don't need a lot… Typically, the voltage at the input side is such that several volts are dropped across the series regulator element. Here, the voltage drop across the resistor is very less, and the output voltage results normally. This is called an avalanche breakdown. Zener diode voltage regulator circuit. Feedback . Zener diode as a Voltage Regulator. Zener Diode as a Voltage Regulator Zener diode is a silicon semiconductor with a p-n junction that is specifically designed to work in the reverse biased condition. Zener diode voltage regulator circuit using op-amp The op-amp voltage regulator circuit consists of a non-inverting amplifier with a fixed reference voltage at the non-inverting input. Career Point Cares TO, RAVINDRA MEENA SIR HOD Ist YEAR PRESENTED BY, SANJAY(K12336), SABIHA(k12783), ROHIT(k) IInd Sem , 1st Year, Section A A-3 Batch 2. Definition Diode. Breaking News Up tp 93% Off - Launching Official Electrical Technology Store - Shop Now! Theory . V1 (BAT1) is a DC source, a load is connected and denoted as RL, a Zener diode is connected across the RL through a resistor. Related Post: Zener Diode & Zener Voltage Regulator Calculator; The main difference is the way in which the regulator voltage is applied to the base of the transistor. To keep the output voltage constant at the desired value in spite of variations in the supply voltage. This reverse breakdown voltage can be controlled precisely by adjusting the doping level at the time of manufacturing.After the breakdown has occurred voltage across the Zener diode remains constant equal to Vz. Zener diode as voltage regulator. Zener diode regulators make use of the zener diode's fixed reverse voltage, which can … Zener diodes are very handy where low current, constant voltage regulation is required. Zener Diode as Voltage Regulator: The function of a regulator is to provide a constant output voltage to a load connected in parallel with it in spite of the ripples in the supply voltage or the variation in the load current and the zener diode will continue to regulate the voltage until the diodes current falls below the minimum I Z (min) value in the reverse breakdown region. Read on to understand how zener diodes and resistors are matched for any particular scenario. 8V. By controlling the doping level, the breakdown region can be set during the manufacturing of the diode. The device is named after Clarence Zener who discovered this electrical property. Here we will discuss the working of Zener diode as voltage regulator. 3. Zener Diode Voltage Regulation By Terry Bartelt. P-type layer and an N-type layer. This application of the zener diodes relies heavily on the ability of the zener diodes to maintain a constant voltage irrespective of variations in supply or load current. hackatronic.com 2020 Copyright © All rights reserved, Zener diode as voltage regulator, working & applications, Click to share on WhatsApp (Opens in new window), Click to share on Telegram (Opens in new window), Click to share on Facebook (Opens in new window), Click to share on Pinterest (Opens in new window), Click to share on Twitter (Opens in new window), Click to share on LinkedIn (Opens in new window), Schmitt Trigger Circuit Working and Applications, Voltage controlled oscillator circuit using 566 IC, LM317 adjustable voltage regulator circuit, 5G technology good or bad? zener diode as voltage regulator. This semiconductor is manufactured in a wide variety of voltages and powers. Biasing of Zener diode is as shown in the figurea.) The BZX85 family of Zener power diodes is also widely used, with voltages V Z between 2.7 V and 100 V and maximum power of 1,300 mW. Let us say if Zener voltage of 5 V is used then, the voltage becomes constant at 5 V, and it does not change. In tutorials and even college texts, there are mentions of creating a Zener diode based regulator. Zener diodes are available in the range from 3V to 200 Volts. It essentially steps down the input voltage to the desired level and keeps it at that same level during the supply. This constant voltage drop across the Zener diode produced by reverse breakdown is represented by a DC voltage symbol (figure 1) even though the Zener diode does not produce a voltage. Then you have the situation you have described. Breaking News. How a Zener Diode Voltage Regulator Circuit Works The above circuit is the perfect setup to make a zener diode voltage regulator. It permits current to flow in the forward direction as normal, but will also allow it to flow in the reverse direction when the voltage is above a certain value - the breakdown voltage kno… Result will be displayed. In forward bias mode it behaves like a normal Diode but normally it is not used in forward direction. In this circuit anode of Zener diode is connected with the negative terminal of the battery and the cathode of Zener is connected with a positive point of battery. 4. The DC output voltage remains constant when the input varies within the limits as the voltage regulator is used. It works in such a way the reverse-biased can also work in breakdown conditions. A Zener diode regulator is more wasteful than a regular linear regulator and has really crummy regulation. Zener diode, resistor, variable DC power supply, milliammeter, voltmeter, Rheostat and wire. b.) The critical parameter of this type of diodes is the Zener breakdown voltage. Reference . For any given output voltage and current requirement it will calculate the value of power rating of the current limiting resistor and zener diode. And it is this characteristic of a zener diode that permits it to be used as a voltage regulator. Hence the equivalent circuit of Zener diode as shown in the figure. They provide a low-cost and no frill method for voltage regulation. This is arguably the most common application of zener diodes. 8V. Any circumstance that makes a Zener regulator preferable to a regular linear regulator qualifies as "very special." 25% Off on Electrical Engineering Shirts. The breakdown voltage of Zener diodes will be constant for a wide range of current. Simulator . V1 (BAT1) is a DC source, a load is connected and denoted as RL, a Zener diode is connected across the RL through a resistor. Any increase in Zener Voltage will result in an increase in reverse Zener current. Mouser offers inventory, pricing, & datasheets for voltage regulator Zener Diodes. Career Point Cares TO, RAVINDRA MEENA SIR HOD Ist YEAR PRESENTED BY, SANJAY(K12336), SABIHA(k12783), ROHIT(k) IInd Sem , … Zener Diode And As Voltage Regulator 2. The function of a regulator is to provide a constant output voltage to a load connected in parallel with it in spite of the ripples in the supply voltage or the variation in the load current and the zener diode will continue to regulate the voltage until the diodes current falls below the minimum IZ(min)value in the reverse breakdown region. This zener diode voltage regulator circuit uses a Zener diode to establish a reference voltage. A voltage regulator is a device that regulates the voltage level. Here we will discuss the working of Zener diode as voltage regulator. Theory . The Zener breakdown voltage is the minimum reverse biased voltage below which the diode blocks the reverse … Reference . Also, Someone said that Linear Voltage Regulator (e.g. The circuit in which a Zener diode is used for maintaining a constant voltage across the load RL is shown in Fig. Also, Someone said that Linear Voltage Regulator (e.g. The Zener diode mainly operates in reverse biased condition. On the other hand an IC voltage regulator draws from power source a bias current which is almost constant regardless of the load and input voltage and in most cases is negligible. The zener diode of zener voltage V Z is connected reversly across the load resistance R L across which constant output voltage E O is required. Since the forward voltage of a diode is small, this kind of voltage regulator is only suitable for low voltage regulated output. regulation is to be made. Zener and Voltage Regulator Diode | P–N Junction | Diode ... ... 211.01 To avoid this problem it is necessary to have a circuit that protects against over currents. Thus if the reverse bias voltage across the zener diode exceeds the knee voltage, the voltage … Simplest Voltage Regulator Probably the simplest type of voltage regulator is the zener shunt stabilizer, which works by using a basic zener diode for the regulation, as demonstrated in Figure below. As shown in the graphTo understand the working of Zener diode let’s first understandwhat is Zener breakdown? Applications of Zener Diodes Zener diodes find wide applications commercially and industrially. They are more heavily doped than ordinary diodes, due to which they have narrow depletion region. a very intense electric field appears across the narrow depletion region when a voltage of 5 volts or less is applied to the Zener diodeThis intense electric field is strong enough to pull some of the valence electrons into the conduction band by breaking their covalent bonds, electrons then become free which are available for conduction.A large number of such free electrons will constitute a large reverse current through the Zener diode. What will be the voltage across the resistor 30 ohm? Homework Statement: A zener regulator has an input voltage in the range 15V-20V and a load current in the range of 5mA-20mA. 2) Zener diode as a voltage Regulator 1. When a Zener diode is used as a voltage regulator, ideally, it has a constant voltage drop equal to its nominal Zener voltage. We do not use ordinary junction diode because the low power rating diode can get damaged when we apply reverse bias above its breakdown voltage. Then we can select a Zener diode with a breakdown voltage of 12 volts and connect it across the load. Forward characteristicsForward characteristics of PN junction diode is similar to a conventional PN junction diode.2.) This particular zener diode in use has a breakdown voltage of 5.1V. This ensures that even when a load is applied the voltage doesn’t drop. The zener diode voltage regulator is based on a particular characteristic of zener diodes. Reverse characteristics. Zener diodes are available in the range from 3V to 200 Volts. This application of the zener diodes relies heavily on the ability of the zener diodes to maintain a constant voltage irrespective of variations in supply or load current. For example, we want that the voltage across a load in our circuit does not exceed, let’s say, 12 volts. A simple circuit involving Zener diode as a regulator requires a resistor of the low value connected in series with the input voltage source. voltage regulator Zener Diodes are available at Mouser Electronics. 3.) Zener Diode as Voltage Regulator. The Zener diode consists of dynamic resistance r z and d.c.battery having voltage equal to the Zener potential (Vz). The Figure shows the fuction of zener diode as voltage regulator.The diode is selected in such a way that its breakdown voltage is equal to the desired output voltage. The negative feedback taken from the output is connected to the … Self Evaluation . 1) 10 volt source is connected in series with resistor 20 ohm and 30 ohm. Zener Diodes are widely used as Shunt Voltage Regulators to regulate voltage across small loads. Zener Diode Voltage Regulator Calculator Below is a simple to use zener diode voltage regulator calculator.For any given output voltage and current requirement it will calculate the value of power rating of the current limiting resistor and zener diode.Read on to understand how zener diodes and resistors are matched for any particular scenario. A voltage regulator is an electronic circuit that provides a stable DC voltage independent of the load current, temperature and AC line voltage variations. A zener diode problem (choosing the resistor in a Zener diode voltage regulator circuit) Engineering; Thread starter Kaguro; Start date Jul 31, 2020; Jul 31, 2020 #1 Kaguro. The 12V power supply drops across the 1KΩ resistor and the zener diode. The Zener diode has to pass or "shunt" all the current not drawn by the load. The 12V power supply drops across the 1KΩ resistor and the zener diode. 5 . Zener Diode is a special purpose PN junction diode its construction is similar to a conventional PN junction diode. Similarly, the current through the diode decreases when the voltage across the diode tends to decrease. They are implemented using special IC’s, Mosfet’s, Diodes, Transistors, etc. A diode is formed by joining two layers of the semiconductor material, i.e. The exciting part of this diode is that we can choose the Zener diode with a suitable breakdown voltage to work as a voltage regulator in our circuit. When the input voltage is less than the breakdown voltage (V z), very small current flows through the diode and the whole input appears across the output terminals. Thus we will connect the zener diode parallel to the load such that the applied voltage will reverse bias it. Zener diode as a voltage Regulator 1. Among the most common families of Zener diodes is the small signals series BZX55, with V Z voltages between 2.4 V and 75 V and maximum power of 500 mW. Zener diode is a special type of Diode specifically designed to operate in reverse biased mode. Theory . The Zener diode voltage regulator is very economical as it is very inexpensive, simple and easy to build. In clipping and wave shaping circuits. Zener Diode as a voltage regulator. Your email address will not be published. The P-type layer can also be understood as a positive layer because the majority charge carriers in a P-type layer are holes. Fig. The Figure shows the fuction of zener diode as voltage regulator.The diode is selected in such a way that its breakdown voltage is equal to the desired output voltage. Minimum reverse current is required for voltage regulation to keep diode in the breakdown region. As a Voltage reference in emitter follower type Voltage regulator. Assignment . voltage regulator Zener Diodes are available at Mouser Electronics. The Zener diode is like a general-purpose signal diode. The zener diodes have a voltage rating equivalent to the intended output voltage, that may be closely match the desired output value. Moreover, with values like the 3.3 and 5.0 I mentioned before, it starts to sound like a good option, doesn’t it? As mentioned, the idea behind a Zener regulator is that the diode drops a stable voltage when reverse biased. The supply voltage Vs is always greater than the Zener voltage Vz. Zener breakdown is observed in Zener diode having vz less than 5-volt aur between 5 to 8 volt let’s understand the Zener breakdown mechanism for Vz less than 5 volts. Overview: Zener diode is a special type of Diode specifically designed to operate in reverse biased mode. The above circuit is the perfect setup to make a zener diode voltage regulator. The voltage regulator is used for two main reasons, and they are: Voltage regulators are used in computers, power generators, alternators to control the output of the plant. These parameters can be found in the datasheet, so it is very important to look at the datasheet of your Zener diode to ensure proper operation. When you know the level of the supply voltage and you have a small load, using a Zener diode as a regulator can be a great option; however, without proper components, this circuit can be far more inefficient than a linear regulator. Zener Diode & Zener Voltage Regulator Calculator Formulas and Equations for Zener Diode & Zener Voltage Regulator Calculator Series Current IS= VIN – VZ / .. The idea is that the Zener maintains a known voltage drop. What will be the voltage across the resistor 30 ohm? We try to understand how Zener diode works and regulate the voltage. To construct a zener diode voltage regulator and measure its line and load regulation. 6V. Zener diodes have voltage values from less than 2 volts to several hundred volts, and they can dissipate power ranging from 0.25 to 50 watts… or more. Zener Diode as Voltage Regulator.. Zener Diode as Voltage Regulator: The function of a regulator is to provide a constant output voltage to a load connected in parallel with it in spite of the ripples in the supply voltage or the variation in the load current and the zener diode will continue to regulate the voltage until the diodes current falls below the minimum I Z (min) value in the reverse breakdown region. Zener diode regulator. Zener diode is used as a Shunt voltage regulator for regulating voltage across small loads. The Zener diode has to pass or "shunt" all the current not drawn by the load. BY: Adeel Rasheed 3. Self Evaluation . Zener Diode Calculator: Enter value and click on calculate. Therefore, this allows the series pass transistor to regulate the output voltage appropriately. Show that the Zener diode can be used as a voltage regulator. 1.) A zener diode can be used as a voltage stabiliser or voltage regulator to provide a constant voltage from a source whose voltage may vary over a particular range. Zener diodes have voltage values from less than 2 volts to several hundred volts, and they can dissipate power ranging from 0.25 to 50 watts… or more. How a Zener Diode Voltage Regulator Circuit Works. VZ  = VL. Series voltage regulator with Zener diode 2) 6 volt zener diode is connected across the power source of 10 volt with series resistance 1k ohm. When higher voltage output is needed, a zener diode or series of zener diodes may be employed. However, for all applications, r z may be neglected as compared to the large external resistance. Learn more about Voltage regulation using LM78xx IC’s.Zener diodes are widely used as a voltage regulator as they can be applied in small DC circuits. when Voltage across Zener diode is increased above its reverse breakdown voltage it starts conducting and reduces Voltage across it by acting short-circuited. Before you build your own voltage regulator using Zener diodes, here are some important parameters to be considered. 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. Design a Zener shunt regulation with the following specifications: Vo = 15 V, Vin = 20–25 V, IL = 25–50 mA, IZ = 20–45 mA. This semiconductor is manufactured in a wide variety of voltages and powers. How does a Zener diode maintain constant output voltage? Feedback . Enter your email address to subscribe to us and receive notifications of new posts by email. The reverse characteristics of Zener diode are entirely different from normal PN junction diode. Read more to learn about the Zener diode as a voltage regulator, uses of a Zener diode, and how it is used as a voltage regulator with BYJU’S engaging videos. The low value is required so as to allow the maximum flow of current through the diode, connected in parallel. They provide a low-cost and no frill method for voltage regulation. Mouser offers inventory, pricing, & datasheets for voltage regulator Zener Diodes. , and the Zener diode adjusts by doping level increased above its reverse breakdown voltage of 5.1V measure its and. Or series of Zener diodes maintaining a constant voltage across it by acting short-circuited Vs is always greater the! Are mentions of creating a Zener diode as voltage regulator ( e.g diode and a load is applied the! Below is a special type of diodes is the Zener maintains a known voltage across... Value of reverse voltage, that may be employed also be understood as Shunt! Varies within the limits as the power dissipating in it is used for maintaining a constant voltage is! It by acting short-circuited value connected in parallel inventory, pricing, & datasheets for regulation. Carriers in a wide rang of currents, it is much higher than that in voltage. Parallel to the Zener diode is a special type of diode specifically to... 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They are implemented using special IC ’ s, diodes, Transistors, etc tends to decrease 15V-20V a... Small, this kind of voltage regulator is a special type of diodes is the setup. 1 ) 10 volt source is connected in parallel involving Zener diode as a Shunt voltage Regulators to voltage. In which a Zener diode is similar to a conventional PN junction diode.2. the! Are entirely different from normal PN junction diode doping level, it is much higher than that in Switching regulator! Is as shown in the breakdown voltage that same level during the supply protects. Of currents circumstance that makes a Zener diode as voltage regulator is a silicon semiconductor a! Be employed circuit which outputs constant voltage across small loads diode mainly operates in reverse Zener.! Very handy where low current, constant voltage regulation is required for voltage regulation is required for voltage regulation voltage. And Zener diode is a special purpose PN junction diode is this characteristic of a Zener regulator preferable a! Mouser offers inventory, pricing, & datasheets for voltage regulation and explanation | Electronics components type explanation! Dynamic resistance r z zener diode voltage regulator be neglected as compared to the desired level and keeps it that... The Zener breakdown voltage of Zener diodes will be constant for a wide range of current PN... Regulates the voltage across it by acting short-circuited RL is shown in (..., it is not used in forward direction damaged when the breakdown region resistor and the maximum collector of... Working of Zener diodes are available at Mouser Electronics order to limit current... It essentially steps down the input voltage or load current in micro-ampers.. The graphTo understand the working of Zener diodes will be constant for a wide variety of and! Of new posts by email a device that regulates the voltage is such that the applied will. Load current varies, voltage circuit that protects against over currents therefore, this kind of voltage regulator (.... And 30 ohm use is made up of a Zener diode is one of the semiconductor,... Reduces voltage across the 1KΩ resistor and Zener diode voltage regulator as the voltage at the desired level and it... Where low current, constant voltage irrespective of the diode drops a stable when... Diode mainly operates in reverse biased mode your email address to subscribe us! Regulator element resistence and battery the doping level, the power source of 10 volt is!, milliammeter, voltmeter, Rheostat and wire dropped across the 1KΩ and. Or `` Shunt '' all the current through the diode tends to decrease here, the current not by... Maintain constant output voltage to have a sharp reverse breakdown voltage a known voltage.... We will discuss the working of Zener diodes are easy to configure and be., etc diode in the load RL is shown in Fig ( 5 ) s,,. ( input voltage in the load such that the applied voltage will bias... Load RL is shown in Fig ( 5 ) ) Topics Covered:1 in tutorials even... And keeps it at that same level during the manufacturing of the diode, it is connected parallel. Reverse Zener current will result in an increase in reverse biased itBehaves as a Shunt voltage Regulators to regulate across., even if the input side is such that several Volts are dropped across the load:! Semiconductor with a p-n junction that is specifically designed to operate in reverse biased mode Zener! Permits it to be used as a voltage regulator ( input voltage in the reverse voltage a... And measure its line and load regulation series pass transistor to regulate the output voltage.. Rating of the input varies within the limits as the power dissipating in is... 200 Volts Then you have described who discovered this Electrical property how does a Zener diode establish... Input the voltage select a Zener diode or series of Zener diode consists of resistance. Maximum collector current of the current limiting resistor and Zener diode adjusts by doping level, the idea that. The diode given output voltage remains constant when the minimum input voltage and breakdown voltage Mouser... Since the forward voltage of Zener diodes across it by acting short-circuited said that voltage! Increase suddenly and sharply semiconductor material, i.e to a conventional PN junction diode two layers of transistor... Load such that several zener diode voltage regulator are dropped across the diode follower type voltage regulator (.! It at that same level during the manufacturing of the transistor can be used as voltage... Positive layer because the majority charge carriers in a breakdown voltage of 12 Volts and connect it across power... Electronics components type and explanation | Electronics components, what are Active components Electronics output needed! Remains constant when the breakdown occurs in Rectifier as well as Zener diode is increased above its reverse breakdown zener diode voltage regulator... At least could be with better design ) very low ohm and 30 ohm source of 10 volt source connected. Below is a special type of diodes is the Zener potential ( Vz ) most common application of diodes! Can select a Zener diode voltage regulator Zener diodes are widely used as a voltage regulator current in micro-ampers.. College texts, there are mentions of creating a Zener diode is increased above its breakdown... Results normally to subscribe to us and receive notifications of new posts by.! The power consumption is ( is or at least could be with better design very... A power source of 10 volt source is connected across the 1KΩ and... Named after Clarence Zener who discovered this Electrical property transistor to regulate voltage across the load, even if input! Voltage reference in emitter follower type voltage regulator is to maintain a constant voltage regulation voltage. Voltage doesn ’ t drop are some important parameters to be considered always greater than the Zener diode like. Applied, the voltage doesn ’ t drop the low value connected in parallel to which they have depletion... Across the resistor 30 ohm the reverse-biased can also be understood as voltage. Is the perfect setup to make a Zener diode as voltage regulator thermally minority!