LM is guaranteed over a 0 C to a70 C temperature . Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is. LM datasheet, LM circuit, LM data sheet: TI – OPERATIONAL AMPLIFIERS/BUFFERS,alldatasheet, datasheet, Datasheet search site for Electronic. Part Number: LM, Maunfacturer: National Semiconductor, Part Family: LM, File type: PDF, Document: Datasheet – semiconductor.

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The LM is an adjustable analogue to the popular 78xx fixed regulators.

Linear regulators inherently waste power, the power dissipated is the current passed multiplied by the voltage difference between input and output. In other projects Datasheeet Commons.

This is the trade-off for using linear regulators which are a simple way to provide a vatasheet voltage with few additional components. Accidenti come scotta questo transistor.

LM Datasheet PDF – National ->Texas Instruments

Failure to do this may cause the circuit to short. This page was last edited on 6 Julyat It was designed by Robert “Bob” Pease.

From Wikipedia, dayasheet free encyclopedia. The output current is that resulting from dropping the reference voltage across the resistor. Retrieved from ” https: Wikimedia Commons has media related to LM and Voltage regulator circuits. For large voltage differences, the energy lost as heat can ultimately be greater than that provided to the circuit. The mechanism used is similar enough that a voltage divider can be used in the ddatasheet way as with the LM and the output follows the same formula, using the regulator’s fixed voltage for V ref e.

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In packages with a heat-dissipating mounting tab, such as TOthe tab is connected internally to the output pin which may make it necessary to electrically isolate the tab or the heat sink from other parts of the application circuit. Because some quiescent current flows from the adjustment pin of the device, an error term is added:. Archived from the original PDF on 18 April The device can be dayasheet to regulate the current to a load, rather than the voltage, by replacing the low-side resistor of the divider with the load itself.

In use an LM commonly requires a heat sink to prevent the operating temperature rising too high. Archived from the original on 17 December Retrieved 31 March The LM is a popular adjustable positive linear voltage regulator. The LM has three pins: The LM is designed to compensate for these fluctuations internally, making such measures unnecessary. The LM negative complement to the LM regulates voltages below, rather than above, the reference.

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How the adjustment pin is connected determines the output voltage as follows.

LM312 Datasheet

Views Read Edit View history. The alternative is to use a switching voltage regulator which is usually more efficient but has a larger footprint and requires a larger number of associated components.

Like the LM, each of the 78xx regulators is designed to adjust the output voltage until it is some fixed voltage above the adjustment pin which in this case is labelled ” ground “. By catasheet this site, you agree to the Terms of Use and Privacy Policy. However, the 78xx device’s quiescent current is substantially higher and less stable. Higher regulated voltages are obtained by connecting the datasyeet pin to a resistive voltage divider between the output and ground. If the adjustment pin is connected to ground the output pin delivers a regulated voltage of 1.

The LM relates in the same way to the fixed 79xx regulators.

LM312 Datasheet PDF

Linear integrated circuits Voltage regulation. Because of this, the error term in the formula cannot be ignored and the value of the low-side resistor becomes more critical.

Archived from the original PDF on 31 March