LM312 DATASHEET PDF

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

Failure to do this may km312 the circuit to short. 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. The LM is designed to compensate for these fluctuations internally, making such measures unnecessary. Archived from the original on 17 December Wikimedia Commons has media related to LM and Voltage regulator circuits.

Higher regulated voltages are obtained by connecting the adjustment pin to a resistive voltage divider between the output and ground. This is the trade-off for using linear regulators which are a simple way to datasheeet a stable voltage with few additional components. Datasheef from the original PDF on 31 March The output current is that resulting from dropping the reference voltage across the resistor.

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LM312 Datasheet

Archived from the original PDF on 18 April It was designed by Robert “Bob” Pease. Accidenti come scotta questo transistor. 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 dxtasheet parts of the application circuit.

How the adjustment pin is connected determines the output km312 as follows. This page was last edited on 6 Julyat 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. Views Read Edit View history.

Operational Amplifiers – National Semiconductor

The LM is an adjustable analogue to the popular 78xx fixed regulators. 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, lm32 the regulator’s fixed voltage for V ref e. For large voltage differences, the energy lost as heat can ultimately be greater than that provided to the circuit.

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. Because some quiescent current flows from the adjustment pin of the device, an error term is added:. Like the LM, each of the 78xx regulators is designed to adjust the output voltage until it is some fixed voltage datadheet the adjustment pin which in this case is labelled ” ground “.

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Dattasheet Wikipedia, the free encyclopedia. The LM has three pins: In other projects Wikimedia Commons.

The LM negative complement to the LM regulates voltages below, rather than above, the reference. The LM relates in the same way to the fixed 79xx regulators. Linear regulators inherently waste power, the power dissipated is the current passed multiplied by the voltage difference between input and output.

National Semiconductor – datasheet pdf

If the adjustment pin is connected to ground the output pin delivers a regulated voltage of 1. By using this site, you agree to the Terms of Use and Privacy Policy. Retrieved 31 March In use an LM commonly requires a heat sink to prevent the operating temperature rising too high.

The LM is a popular adjustable positive linear voltage regulator. Retrieved from ” https: