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 relates in the same way to the fixed 79xx regulators. Accidenti come scotta questo transistor. The LM is a popular adjustable positive linear voltage regulator.

The output current is that resulting from dropping the reference voltage across the resistor. Linear integrated circuits Voltage regulation. In other projects Wikimedia Commons.

LM Datasheet pdf – Operational Amplifier – National Semiconductor

Views Read Edit View history. Archived from dagasheet original on 17 December 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 provide a stable voltage with few additional components. How datashfet adjustment pin is connected determines the output voltage as follows.

Wikimedia Commons has media related to LM and Voltage regulator circuits.


The LM negative complement to the LM regulates voltages below, rather than above, the reference. This page was last edited on 6 Julyat Retrieved from ” https: Linear regulators inherently waste power, the power dissipated is the current passed multiplied by the voltage difference between input and output.


Operational Amplifiers – National Semiconductor

Failure to do this may cause the circuit to short. By using this site, you agree to the Terms of Use and Privacy Policy. 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 LM is an adjustable analogue to the popular 78xx fixed regulators.

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 datashee application circuit.

LM312 Datasheet PDF

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. The LM is designed to compensate for these fluctuations internally, making such measures unnecessary. The device can be configured to regulate the current to a load, rather than the datasheet, by replacing the low-side resistor of the divider with the load itself.


LM 데이터시트(PDF) – TI store

Because of lm132, the error term in the formula cannot be ignored and the value of the low-side resistor becomes more critical. If the adjustment pin is connected to ground the output pin delivers a regulated voltage of 1. The LM has three pins: 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 “.

For large voltage differences, the energy lost as heat can ultimately be daatasheet than that provided to the circuit. It was designed by Robert “Bob” Pease. 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 use an LM commonly requires a heat sink to lm3122 the operating temperature rising too high. From Wikipedia, the free encyclopedia.