LM317K DATASHEET PDF

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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Lm317k Data Sheet

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, datasheet the regulator’s fixed voltage for V ref e. The alternative is to use a switching voltage regulator which is usually more efficient but has a larger footprint and requires a larger lm317j of associated components.

Wikimedia Commons has media related to LM and Voltage regulator circuits. The LM is a popular adjustable positive linear voltage regulator. Archived from the original on 17 December Higher regulated voltages are obtained by connecting the adjustment pin to a resistive voltage ln317k between the output and ground. However, the 78xx device’s quiescent current is substantially higher and less stable.

The LM relates in the same way to the fixed 79xx regulators. Archived from the original PDF on 18 April Accidenti come scotta questo transistor. Because of this, the error term in datassheet formula cannot be ignored and the value of the low-side resistor becomes more critical.

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Views Read Edit View history. This is the trade-off for using linear regulators which are a simple way to provide a stable voltage with few additional components. 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 “.

It was designed by Robert “Bob” Pease. Archived from the original PDF on 31 March Because some lm3317k current flows from the adjustment pin of the device, an error term is added:. The LM is designed to compensate for these fluctuations internally, making such measures unnecessary.

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 darasheet. For large voltage differences, the energy lost as heat can ultimately be greater than that provided to the circuit. Retrieved from ” https: If the adjustment pin is connected to ground the output pin delivers a regulated voltage of 1.

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The output current is that resulting from dropping the reference voltage across the resistor.

The LM is an adjustable analogue to the popular 78xx fixed regulators. In use an LM commonly requires a heat sink to prevent the operating temperature l3m17k too high. The LM has three pins: This dattasheet was last edited on 6 Julyat The LM negative complement to the LM regulates voltages below, rather than above, the reference.

Failure to do this may cause the circuit to short. Retrieved 31 March In other projects Wikimedia Commons. 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.

By using this site, you agree to the Terms of Use and Privacy Policy. Linear integrated circuits Voltage regulation. How the adjustment pin is connected lm317m the output voltage as follows.

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