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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The Resistor R1 1K and the potentiometer 10k together creates a potential difference at adjust pin which regulates the output pin accordingly. Now swap out the R2 resistor and place a 1.

Computers and Peripherals Data Center. Limited Engineering samples available Preview: This is the advantage of adjustable voltage regulators. In our setup now, adtasheet are the values we’re going to use. To adjust output, we swap out resistor R2 value for a different resistance. Getting started with eDesignSuite 5: In use an LM commonly requires a heat sink to prevent the operating temperature rising too high. It can supply more than 1.

LM3171 Datasheet PDF – Fairchild Semiconductor

Therefore, you can see based on this formula, that the more the value of resistor R2 increases, the greater the voltage output. The below circuit is designed to take 12V you can supply up to 24V as input and regulate it from 1.


Complete Technical Details can be found at the LM datasheet given dxtasheet the end of this page. Since we want 5 volts to be output, we must calculate which value of R2 will yield an output of 5 volts.

The LM is a popular adjustable positive linear voltage regulator.

Because some quiescent current flows from the adjustment pin of the device, an error term is added:. So, if you are looking for a variable voltage regulator to deliver current up to 1. Here you see we connect two resistors to the voltage regulator. This is the trade-off for using linear regulators which datasueet a simple way to provide a stable voltage with few additional components.

The LM is designed to compensate for these fluctuations internally, making such measures unnecessary. Buy Direct Add to cart. Now that we’ve dealt with the datsheet pin, we must now deal with the adjustable pin Adj.

This capacitors helps smooth out the power supply line in case of abrupt current spikes.


Retrieved 31 March In other projects Wikimedia Commons. If the adjustment pin is connected to ground the output pin delivers a regulated voltage of 1.

No commitment taken to design or produce NRND: The output current is that resulting from dropping the reference voltage across the resistor. The LM Voltage Regulator is a 3-terminal adjustable voltage regulator which can supply an output voltage adjustable dztasheet 1.

LM Datasheet PDF – Positive Voltage Regulator – Fairchild

Product is in design feasibility stage. These resistors determine the voltage that the voltage regulator adjusts to and outputs.

How to use LM From Wikipedia, the free encyclopedia. Not Recommended for New Design. No availability reported, please contact our Sales office. Selectors Simulators and Models. The voltage which enters this pin must be larger than daasheet voltage it is feeding out.

You can adjust it to any voltage within the range that the voltage regulator supports. TL — Programmable Reference Voltage.