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LMK STMicroelectronics Linear Voltage Regulators V Adj Positive datasheet, inventory, & pricing. LMK datasheet, LMK pdf, LMK data sheet, datasheet, data sheet, pdf, SemeLAB, A Adjustable Positive Voltage Regulator. STMicroelectronics LMK: 51 available from 3 distributors. Explore Integrated Circuits (ICs) on Octopart: the fastest source for datasheets, pricing, specs and.

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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.

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

Archived from the original on 17 December 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.

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

Lm317k Data Sheet

However, the 78xx device’s quiescent current is substantially higher and less stable. The LM is an adjustable analogue to the popular 78xx fixed regulators. For large voltage differences, the energy lost as heat can ultimately be greater than that provided to the circuit.


Retrieved from ” https: Linear integrated circuits Voltage regulation. The LM relates in the same way to the fixed 79xx regulators.

The LM is designed to compensate for these fluctuations internally, making such measures unnecessary. Views Read Edit View history.

LMK Datasheet(PDF) – Inchange Semiconductor Company Limited

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 lm3317k same formula, using the regulator’s fixed voltage for V ref e. 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 “.

Higher regulated voltages are obtained by connecting the adjustment pin to a resistive voltage lm317, between the output and ground. The LM has three pins: Accidenti come scotta questo transistor.

Archived from the original PDF on 18 April In other projects Wikimedia Commons. Because some quiescent current flows from the adjustment pin of the device, an error term is added:.

From Wikipedia, the free encyclopedia. Because of this, 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. In use an Lm317, commonly requires a heat sink to prevent the operating temperature rising too high. The LM negative complement to the LM regulates voltages below, rather than above, the reference.


Archived from the original PDF on 31 March It was designed by Robert “Bob” Pease.

Failure to do this may cause the circuit to short. Wikimedia Commons has media related to LM and Voltage regulator circuits. The output current is that resulting from dropping the reference voltage across the resistor. This page was last edited on 6 Julyat This is the trade-off for using linear regulators which are a simple way to provide lm31k stable voltage with few additional components.

By using this site, you agree to the Terms of Use and Privacy Policy. The LM is a popular adjustable positive linear voltage regulator. Retrieved 31 March 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.