An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters . LM, LM Datasheet. DS – Rev 20 – May For further information contact your local STMicroelectronics sales office. The LM, LM are monolithic integrated circuits in TO, TOFP and D²PAK packages intended for use as positive adjustable voltage regulators.

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If the adjustment pin is connected to ground the output pin delivers a regulated voltage of 1. Please contact our sales support for information on specific devices.

Support Center Complete list and gateway to support services and resource pools. In other projects Wikimedia Commons. The LM has three pins: Because of this, the error term in the formula cannot be ignored and the value of the low-side resistor becomes more critical. Failure to do this lm31171 cause the circuit to short. They do not and cannot create voltage on their own. This page was last edited on 6 Julyat Now swap out the R2 resistor and place a 1. This is the advantage of adjustable voltage regulators.

LM Voltage Regulator Pinout, Features, Equivalent & Datasheet

Let’s see how the schematic is set up: Therefore, you can see based on this formula, that the more the value of resistor R2 increases, the greater the voltage output.

The voltage which enters this pin must be larger than the om3171 it is feeding out. Not Recommended for New Design. Wikimedia Commons has media related to LM and Voltage regulator circuits. How the adjustment pin is connected determines the output voltage as follows.


LM3171 Datasheet

ST Code of Conduct Blog. Complete Technical Details can be found at the LM datasheet given at the end of this page. The Resistor R1 1K and the potentiometer 10k together creates datasheet potential difference at adjust pin which regulates the output pin accordingly.

In our setup now, these are the values we’re going to use. In use an LM commonly requires a heat sink to prevent the operating temperature rising too high. So therefore, since we want 5 volts as output, we will feed into this regulator 7 volts. Product is in volume production only to support customers ongoing production.

These resistors determine the voltage that the voltage regulator adjusts to and outputs. To find out more details about it, see the datasheet which is attached below: Key Features Output voltage range: Because some quiescent current flows from the adjustment pin of the device, an dxtasheet term is added:.


LM Datasheet, PDF – Alldatasheet

From Wikipedia, the free encyclopedia. When it comes to variable voltage regulation requirements LM would most likely be the first choice. Buy Direct Add to cart. General terms and conditions. We’re going to put 12 volts into the voltage regulator and regulate it down to 5V.

By using this site, you agree to the Terms of Use and Privacy Policy. Datasheett feed a circuit the regulated 5 volts, we just connect it to the output pin. You will discover it’s very close to 5 volts.


LM317 Voltage Regulator

The output current is that resulting from dropping the reference voltage across the resistor. We do this by changing the value of the resistor connected to the Adj datawheet of the voltage regulator. Below is the pinout: For example, the LM may receive 12V as the input and output a constant 10V as output. Marketing proposal for customer feedback.

And the simulation shows 7. The same formulae can also be used to dafasheet the value of resistor for you required output voltage. Retrieved 31 March TL — Programmable Reference Voltage.

The voltage that the adjustable regulator outputs is determined by the equation below: Remember, voltage regulators are just devices that regulate voltage down to a certain level. In our circuit, a motor is connected as a load which consumes around mA you lk3171 connect any load up to 1.

If you need to calculate output voltages or which resistor R2 value you would need for a circuit, see our LM Resistor and Voltage Calculator.

Who We Are Management. Distributor Name Region Stock Min. Like the LM, each of the 78xx regulators is designed to adjust the ddatasheet voltage until it is some fixed voltage above the adjustment pin which in this case is labelled ” ground “. How to use LM The last pin of the LM is the output catasheet.

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