LM317K DATASHEET PDF

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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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Linear integrated circuits Voltage regulation. The output current is that resulting from dropping the reference voltage across the resistor.

The LM is designed to compensate for these fluctuations internally, making such measures unnecessary. For large voltage differences, the energy lost as heat can ultimately be greater than that provided to the circuit.

Retrieved 31 March The LM has three pins: Archived from the original on 17 December By using this site, you agree to the Terms of Use and Privacy Policy. Linear regulators inherently waste power, the power dissipated is the current passed multiplied by the voltage difference between input and output. Wikimedia Commons has media related to LM and Voltage regulator circuits.

However, the 78xx device’s quiescent current is substantially higher and lk317k stable. This page was last edited on 6 Julyat It was designed by Robert “Bob” Pease.

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In use an LM commonly requires a heat sink to prevent the operating temperature rising too high. Accidenti come scotta questo transistor. The alternative is to use dataaheet switching voltage regulator which is usually more efficient but has a larger footprint and requires a larger number of associated components.

LMK Datasheet(PDF) – STMicroelectronics

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 is a popular adjustable positive linear voltage regulator. From Wikipedia, the free encyclopedia. The LM relates in the daatsheet way datasehet the fixed 79xx regulators.

Retrieved from ” https: 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 PDF on 18 April 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.

Because of this, the error term in the formula cannot be ignored and the value of the low-side resistor becomes more critical. The LM ,m317k complement to the LM regulates voltages below, rather than above, the reference.

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Lm317k Data Sheet

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 some quiescent current flows from the adjustment pin of the device, an error term is added:. How the adjustment pin dattasheet connected determines the output voltage as follows. In other projects Wikimedia Commons. Failure to do this may cause the circuit to short.

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

Higher regulated voltages are obtained by connecting lm3117k 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. Archived from the original PDF on 31 March