Voltage regulators (stabilizers) 78xx and 79xx. Redakce HW serveru, May – As a preface, I would like to say that HW server does not indend at all. LM79XX Series. 3-Terminal Negative Regulators. General Description. The LM79XX series of 3-terminal regulators is available with fixed output voltages of − 5V. 79xx voltage regulators are very commonly used in electronic Similar to IC 79xx, IC 78XX is a three pin IC that gives a constant output voltage.

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If adequate heat sinking is provided, they can deliver over 1A output current.

Voltage regulators (stabilizers) 78xx and 79xx

If this is an intention to reduce internal consumption of the circuit to a minimum, at the expense volgage problems with output voltage with no load, it should have been mentioned in the datasheet. Like the LM78XX series they hey employ internal current limiting safe area protection and thermal shutdown for protection against virtually all overload conditions.

It must be a 2.

The ST company can argue that this is possible; however, that the voltage from The fact that we found this fault in ST parts only does not signify that other manufacturers’ ICs are free from it. These devices need only voltae compensation capacitor 1uF solid tantalum or 25uF aluminum electrolytic at the output. Connection Diagram IC 79xx is used in circuits as shown in the circuit. Consumption no load Consumption 1k load LCV 1. The number 79 indicates that it is a negative voltage regulator and xx indicates the output voltage of the IC.

No data is shared unless you engage with this feature. Heat sink boosts heat dissipation therefore the life of the device can be extended. In most cases, only a single sample of a given type by a given manufacturer was available; exceptions are MC 3 samples measured and, of course, stabilizers by ST 5 samples of each type measured; samples purchased at different times voltagw different stores. No data is shared with Facebook unless you engage with this feature.


Any of the other positive regulators will work the same way as long as one observes proper input voltage levels and component ratings. Figure 4 shows a basic 5 volt general purpose power supply.

The pin 3 acts as the output terminal constant regulated 5V. However, the fault does not occur for commonly used input voltages. At first, 79x came to a wrong conclusion, that the faulty stabilizers are sold at GM Electronic only, and we have released this information prematurely.

Pin out Configuration of IC 79xx. The 79xx voltage regulators series made by ST have to be connected to a load consuming at least 5 mA. This is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal.

Using LM78XX Series Voltage Regulators Tutorial

Since the stabilizers are used more often, several other parts are shown in the graph as well. This is used to identify particular browsers or devices when the access the service, and is used for security reasons.

Again, there was V. This is a cloud services platform that we used to host our service. Current consumptions of both stabilizers, with and without a regulahor.

Each type employs internal current limiting, thermal shut down and safe operating area protection, making it essentially indestructible. The 78xx family is commonly used in electronic circuits requiring a regulated power supply due to their ease-of-use and low cost. Comments are not for promoting degulator articles or other sites.


We will be glad to publish a response from the manufacturer, as well as readers’ comments to this issue. As a preface, I would like to say that HW server does not indend at all to ‘criticise at every cost’. This is probably the cause of the problem. The situation is similar with other stabilizers. In order to improve stability two capacitors — C 1 and C 2 are used.

The 78xx line are positive voltage regulators: The SR from Datel is a full switching power supply module designed as a drop-in replacement for 78xx chipsand not a linear regulator like the 78xx ICs. Tomas Kouba Jan Rehak Translated by: This service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles.

This is used to provide data on traffic to our website, all personally identifyable data is anonymized. They are made by several manufacturers, most are readily available, and are inexpensive. Questions must be on-topic, written with proper grammar usage, and understandable to a wide audience.

This page was last edited on 5 Decemberat Google provides ad serving technology and runs an ad network. We will make use of the 78XX and 79XX series of voltage regulators. Thank you for following me. HubPages and Hubbers authors may earn revenue on this page based on affiliate relationships and advertisements with partners including Amazon, Google, and others.