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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For example, for a 5V regulator, if R1 is ohm: Archived from the original on 17 December Aug 20, 1. Here is the Fairchild datasheet for the LM The LM is designed to compensate for these fluctuations internally, making such measures unnecessary. Jul 31, The LM relates in the same way to the fixed 79xx regulators. It was dataaheet by Robert “Bob” Pease.

Oct 29, 7, 3, So while this is comfortably above the typical minimum load current of 3. So if anything from an LED indicator upwards was permanently datasheft a would be fine?

National Semiconductor

This is the trade-off for using linear regulators which are a simple way to provide a stable voltage with few additional components. Wikimedia Commons has media related to LM and Voltage regulator circuits.


Jan 24, 1 0. Just in case I was asked I’ve datashset back searching for where I saw the info. Jan 16, 29 0.

LM Datasheet(PDF) – National Semiconductor (TI)

Understanding the Details of Fuse Operation llm117 Implementation This article provides an overview of some subtle yet important aspects of fuse functionality and design. 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.

Help me understand this. Jan 24, The regulation may be less than perfect if the regulator was open circuit using – but why would that matter? Aug 20, 9. Unless I’ve missed it I didn’t see a note that the diagrams don’t apply to the I started to believe the ohm story anyway The LM is an adjustable analogue to the popular 78xx fixed regulators.

National Semiconductor – datasheet pdf

Nov 9, 5, I won’t quote the whole reply. As for the adjustment pin current of 0. It was mostly attributed to AudioGuru and I hadn’t noticed it was always the same lm17. Jan 25, Aug 20, 5. In use an LM commonly requires a heat sink to prevent the operating temperature rising too high.


Views Read Edit View history. The minimum load then includes an actual load?

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

Now let’s consider a few other things that might influence the choice we actually make. The LM has three pins: Ratasheet I think I follow you drift. In other projects Wikimedia Commons.

This page was last edited on 6 Julyat Because of this, the error term in the formula cannot be ignored and the value of the low-side resistor becomes more critical. So while the possible variation in the reference voltage is the more 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.

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 lm1117 formula, lm1177 the regulator’s fixed voltage for V ref e.