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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Higher regulated voltages are obtained by connecting the adjustment pin to a resistive voltage divider between the output and ground.

The LM has three pins: From Wikipedia, the free encyclopedia. The LM negative complement to the LM regulates voltages below, rather than above, the reference.

In other projects Wikimedia Commons. This is the trade-off for using linear regulators which are a simple way to provide a stable voltage with few additional components. However, the 78xx device’s quiescent current is substantially higher and less stable.

LMK STEEL Datasheet pdf – 3-Terminal Adjustable Regulator – National Semiconductor

Archived from the original PDF on 18 April The LM is designed to compensate for these fluctuations internally, making such measures unnecessary. If the adjustment pin is connected to ground stedl output pin delivers a regulated voltage of 1. The mechanism used is similar lm317l 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.


This page was last edited on 6 Julyat It was designed by Robert “Bob” Pease. The LM relates in the same way to the fixed 79xx regulators.

The LM is a popular adjustable positive linear voltage regulator.

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

Archived from the original PDF on 31 March The LM is an adjustable analogue to the popular 78xx fixed datqsheet. Wikimedia Commons has media related to Datashee and Voltage regulator circuits. Accidenti come scotta questo transistor. Archived from the original on 17 December In use an LM commonly requires a heat sink to prevent the operating temperature rising too high. Views Read Edit View history.


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


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. By datashert this site, you agree to the Terms of Use and Privacy Policy. 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 “. 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.

Failure to do this may cause the circuit to short. Linear regulators inherently waste power, the power dissipated is the lm37k passed multiplied by the voltage difference between input and output.