LMK STEEL National Semiconductor datasheet pdf data sheet FREE Datasheets (data sheet) search for integrated circuits (ic), semiconductors and other. LMK STEEL. NATIONAL ative complement, see LM series data sheet. . LMA and LM Electrical Characteristics (Note 3). LMK STEEL/NOPB IC REG POSITIVE ADJ TO-3 National Semiconductor datasheet pdf data sheet FREE from Datasheet (data sheet).

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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.

Linear integrated circuits Voltage regulation.

The mechanism used is similar enough that a voltage divider can be used in the same way as with the LM and the lm37k follows the same formula, using the regulator’s fixed voltage for V ref e.

The LM has three pins: Accidenti come scotta questo transistor.


The output current is that resulting from dropping the reference voltage across the resistor. Failure to do this may cause the circuit to short. The LM is a popular adjustable positive linear voltage regulator.

This is the trade-off for datzsheet linear regulators which are a simple way to provide a stable voltage with few additional components. Higher regulated voltages are obtained by connecting the adjustment pin to a resistive voltage divider between the output and ground.


From Wikipedia, the free encyclopedia.

In use an LM commonly requires a heat sink to prevent the operating temperature rising too high. In other projects Wikimedia Commons. The LM relates in the same way to the fixed 79xx regulators.

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

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Retrieved 31 March If the adjustment pin is connected to ground the output pin delivers a regulated voltage of 1. Archived from the original PDF on tseel March How the adjustment pin is connected determines the output voltage as follows.

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 “.

This page was last edited on 6 Julyat 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.

For large voltage differences, the energy lost as heat can ultimately be greater than that provided to the circuit. 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 on 17 December The LM is an adjustable analogue to the popular 78xx datqsheet regulators.


LMK-STEELS Datasheet, PDF – Alldatasheet

Because of this, the error term in the formula cannot be stteel and the value lj317k the low-side resistor becomes more critical. The LM negative complement to the LM regulates voltages below, rather than above, the reference.

Views Read Edit View history. The LM is designed to compensate for these fluctuations internally, making such measures unnecessary. By using this site, you agree to the Terms of Use and Privacy Policy. 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:. It was designed by Robert “Bob” Pease. Retrieved from ” https: Archived from the original PDF on 18 April However, the 78xx device’s quiescent current is substantially higher and less stable.