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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Tomas Kouba Jan Rehak Translated by: After a closer examination, I have found V at its reference input, instead of expected -8V. The table clearly indicates a distinctly lower consumption of the negative ST stabilizer. The comparison in this article is not totally objective.

Consumption no load Consumption 1k load LCV 2. Figure shows dependence of the output voltage on the input voltage for a L and a MC with no load, and with approx. Each type employs internal current limiting, thermal shut down and safe operating area protection, making it essentially indestructible. 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 in different stores.

This is used to collect data on traffic to articles and other pages on our site. Please choose which areas of our service you consent to our doing so. Like the LM78XX series they hey employ internal current limiting safe area protection and thermal shutdown for protection against virtually all overload conditions.


This is probably the cause of the problem. After 78xc advice we have tested whether this problem can be caused 78xc oscillating of the stabilizer.

78xx Family Voltge Regulators | Ecobion Labs

Consumption no load Consumption 1k load LCV. Mastering the Raspberry Pi. This is an ad network.

This is feature allows you to search the site. It is a small integrated circuit used in a circuit to supply a constant negative input voltage. The capacitor C 2 is required for stability. It is a component in switching regulator designs and is not a linear regulator like other 78xx devices.

Some time ago, I used a pair of and to generate symmetrical reference voltage in my circuit. ComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Industrial Electronics and Control. Similarly if it isthen output voltage of the IC is volts and so regulatot. Output VA characteristics of a L January Learn how and when to remove this template message. Then, we have studied carefully the datasheets.

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Google provides ad serving technology and runs an ad network. The company says, that they make compatible parts. As a preface, I would like to say that HW server does not indend at all to ‘criticise at every cost’.

IC 79xx (, , , ) – Negative Voltage Regulator | TurboFuture

Some devices provide slightly different voltages than usual, such as the LM78L62 6. The 78xx family is commonly used in electronic circuits requiring a regulated power supply due to their ease-of-use and low cost.

This is used to display charts and graphs on articles and the author center. Conclusion is, that oscillations are not the cause of our overvoltage problem. 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.


Kindly refer the item datasheets for further details. No data is shared with Facebook unless you engage with this feature. Comments are not for promoting your articles or other sites.

In figure 6 we have added a 5. Of course, the output voltage may fluctuate; however, it can’t be four times the nominal output voltage. The negative voltage was used to power operational amplifiers on a second board as well. This is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos.

IC 79xx requires heat sink for its safe operation. The situation is similar with other stabilizers.

If this is an intention to reduce internal consumption of the circuit to a minimum, at the expense of problems with output voltage with no load, it should have been mentioned in the datasheet. However, components by other manufacturers behave differently.

However, the fault does not occur for commonly used input voltages. The fault is definitely caused by ST, the manufacturer.

IC 79xx (7905, 7912, 7915, 7918) – Negative Voltage Regulator

There is a related line of 79xx devices which are complementary negative voltage regulators. Current consumptions of both stabilizers, with and without a load.

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