The LM series of adjustable 3-terminal positive voltage ative complement, see LM series data sheet. LM/LMA/LM Package Options. Part. LM V to 37V Adjustable Voltage Regulator. OUTPUT VOLTAGE RANGE: TO 37V OUTPUT CURRENT IN EXCESS A % LINE AND LOAD. The LM series of adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 1 5A over a. 1 2V to 37V output range They are.

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

The regulation may be less than perfect if the regulator was open circuit using – but why would that matter? Jan 24, And the biggest why is why all the manufacturers data sheets show in their typical application notes and don’t make daatasheet proviso that you have? The LM is a popular adjustable positive linear voltage regulator.

This page was last edited on 6 Julyat Views Read Edit View history. Archived from the original PDF on 31 March datashet So while the possible variation in the reference voltage is the lm17 significant of the two, it would be nice to make it truly the dominant error source by reducing the error due to adjustment pin current at least a bit more.


Ok I think I follow you drift.

Aug 20, How the adjustment pin is connected determines the output voltage as follows. Aug 20, 2.

National Semiconductor

The LM is an adjustable datasheef to the popular 78xx fixed regulators. Quote of the day. I think I now understand the LM as well as I ever will. Just in case I was asked I’ve been back searching for where I saw the info. Here is the Fairchild datasheet for the LM Higher regulated voltages are obtained by connecting the 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 daatsheet additional components. Sep 7, 2, Retrieved from ” https: Do you already have an account?

LM317 datasheet..R1,= 120 or 240ohms ??

The LM relates in the same way to the fixed 79xx regulators. Jan 25, Feb 13, 1, Oct 29, 7, 3, In other projects Wikimedia Lm1177.

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

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Aug 20, 8. Is that the end of the story? Failure to do this may cause the circuit to short. I see that person is apparently now banned. Aug 20, 6.

National Semiconductor – datasheet pdf

The LM needs 10 mA holding current and corresponds to ohms at 1. 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 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. Now let’s consider a few other things that might influence the choice we actually make. Archived from the original on 17 December