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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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If the adjustment pin is connected to ground the output pin delivers a regulated voltage of 1.

LMK Datasheet(PDF) – STMicroelectronics

The LM relates in the same way to the fixed 79xx regulators. The output current is that resulting from dataheet the reference voltage across the resistor. However, the 78xx device’s quiescent current is substantially higher and less stable. This page was last edited on 6 Julyat The LM is designed to compensate for these fluctuations internally, making such measures unnecessary.

LMK Datasheet(PDF) – Inchange Semiconductor Company Limited

Because of this, the error term in the formula cannot be ignored catasheet the value of the low-side resistor becomes more critical.

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

Archived from the original PDF on 18 April The LM is a popular 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.


From Wikipedia, the free encyclopedia. How the adjustment pin is connected determines the output voltage as follows. For large voltage differences, the energy lost as heat can ultimately be greater than that provided to the circuit.

Lm317k Data Sheet

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. Because some quiescent current flows from the adjustment pin of the device, an error term is added:. Linear integrated circuits Voltage regulation. The LM has three pins: The LM is an adjustable analogue to the popular 78xx fixed regulators.

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It was designed by Robert “Bob” Pease. By using this site, you agree to the Terms of Use and Privacy Policy.

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. Archived from the original on 17 December In use an LM commonly requires a heat sink to prevent the operating temperature rising too high. Retrieved from ” https: Accidenti come scotta questo transistor. 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 “.


Wikimedia Commons has media related to LM and Voltage regulator circuits. This is the trade-off for using linear regulators which are a simple way to provide a stable voltage with few additional components. 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.

The LM negative datashdet to lm17k LM regulates voltages below, rather than above, the reference.

Higher regulated voltages are obtained by connecting the adjustment pin to a resistive voltage divider between the output and ground. Archived from the original PDF on 31 March Failure to do this may cause the circuit to short. Retrieved 31 March