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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Pin out Configuration of IC 79xx. Articles needing additional references from January All articles needing additional references. These devices support an input voltage anywhere from around 2.

Current consumptions of both stabilizers, with and without a load. Some devices provide slightly different voltages than usual, such as the LM78L62 6. Comments are not for promoting your articles or other sites. Figure shows the dependencies of the output voltage on the input voltage for a L, TAS, KA; both with regualtor without a 1k load.

This is used to provide traffic data and reports to voltagr authors of articles on the HubPages Service. The pin 3 acts as the output terminal constant regulated 5V. For the years, see 8th millennium. This is a cloud services platform that we used to host our service.

IC 79xx can supply a constant negative voltage output, in spite of any voltage fluctuations in its input voltage. IC 79xx requires heat sink for its safe operation. At first, we came to a wrong conclusion, that the faulty stabilizers are sold at GM Electronic only, and we have released this information prematurely.


No data is shared with Facebook unless you engage with this feature. Please choose which areas of our service you consent to our doing so. Any of the other positive regulators will work the same way as long as one observes proper input voltage levels and component regukator. Please help improve this article by adding citations to reliable sources. Consumption no load Consumption 1k load LCV 2. Industrial Electronics and Control.

78xx Family Voltge Regulators | Ecobion Labs

The situation is similar with other stabilizers. Unless you are signed in reguoator a HubPages account, all personally identifiable information is anonymized. Well, I bought a new L by ST. Voltage regulator IC can be defined as an integrated circuit that is capable of supplying a constant controlled output voltage which is not at all affected by the variations in input voltage provided that the variations are within the prescribed limits under specified atmospheric conditions.

The capacitor 788xx 1 is used only if the regulator is separated from filter capacitor by more than 3″.

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Kindly refer the item datasheets for further details. Voltage fluctuations may damage or reduce the life of circuit components.

This is used for a registered author who enrolls in regualtor HubPages Earnings program and requests to be paid via PayPal. However, the fault does not occur for commonly used input voltages. This article needs additional citations for verification.

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

Voted up, interesting and useful. These devices can be used with external components to obtain adjustable voltages and currents. We may use remarketing pixels from advertising networks such regulagor Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.


This is used to prevent bots and spam. Here, minimum load current is specified: A great insight to this hub so in detail and an educational one. Some time ago, I used a pair of and to generate symmetrical regulxtor voltage in my circuit.

Then, we have studied carefully the datasheets. To provide a better website experience, turbofuture. Nothing like that is there. As a preface, I would like to say that HW server does not indend at all to ‘criticise at every cost’. We partner with Say Media to deliver ad campaigns on our sites. Figure 2 shows the electrical connection for the LM78XX series. Download datasheet for L79xx Download datasheet for L78xx Download datasheet for LM Please note the differences in internal sctructure.

Consumption no load Consumption 1k load LCV. The whole thing worked about a year or so.

The 79xx voltage regulators series made by ST have to be connected to a load consuming at least 5 mA. The fact that we found this fault in ST parts only does not signify that other manufacturers’ ICs are free from it. The comparison is only an example what a developer can buy in voltafe electronics components store. We will be glad to publish a response from the manufacturer, as well as readers’ comments to this issue.

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Some articles have Vimeo videos embedded in them. In the LM datasheet by the same company, minimal load current is specified see picture below.