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 negative complement to the LM regulates voltages below, rather than above, the reference. If the adjustment pin is connected to ground the output pin delivers a regulated voltage of 1. The output current is that resulting from dropping the reference voltage across the resistor. Archived from the original PDF on 31 March Accidenti come scotta questo transistor. Because some quiescent current flows from the adjustment pin of the device, an error term is added:.

The mechanism used is similar enough that a voltage divider can be used in the same way as with the LM and the output follows the same formula, using the regulator’s fixed voltage for V ref e.

In other lm32 Wikimedia Commons. For large voltage differences, the energy lost as heat can ultimately be greater datsaheet that provided to the datazheet. The LM relates in the same way to the fixed 79xx regulators.

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In use an LM commonly requires a heat sink to prevent the operating temperature rising too high. From Wikipedia, the free encyclopedia.

Archived from the original on 17 December It was designed by Robert “Bob” Pease. Linear regulators inherently waste power, the power dissipated is the current passed multiplied by the voltage difference between input and output.

LM312 Datasheet

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. However, the 78xx device’s quiescent current is substantially higher and less stable.

Archived from the original PDF on 18 April This is the trade-off for using linear regulators which are a simple way to provide a stable voltage with few additional components.

The LM is an adjustable analogue to the popular 78xx fixed regulators. Retrieved 31 March The LM is a pm312 adjustable positive linear voltage regulator. The device can be configured to regulate the current to a load, rather than the voltage, by replacing the low-side resistor of the divider with the load itself.

Wikimedia Commons has media related to LM and Voltage regulator circuits. Failure to do this may cause the circuit to short. Retrieved from ” https: Higher regulated voltages are obtained by connecting the adjustment pin to a resistive voltage divider between the output and ground.


How the datashset pin is datasheeet determines the output voltage as follows. 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 “. Because of this, the error term in the formula cannot be ignored and the value of the low-side resistor becomes more critical.

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.

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LM datasheet, Pinout ,application circuits Operational Amplifiers – National Semiconductor

The LM is designed to compensate for these fluctuations internally, making such measures unnecessary. This page was last edited on 6 Julyat By using this site, you agree to the Terms of Use and Privacy Policy.

The LM has three pins:

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