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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By using this site, you agree to the Terms of Use and Privacy Policy. The voltage that the adjustable regulator outputs is determined by the equation below: Adjustable 3-terminal positive voltage regulator Output voltage can be set to range from 1. To datashete output, we swap out resistor R2 value for a different resistance.

TL — Programmable Reference Voltage. Buy Direct Add to cart. This creates adjustable voltages. The voltage which enters this pin must be larger than the voltage it is feeding out.

For large voltage differences, the energy lost as heat can ultimately be greater than that provided to the lm311. Failure to do this may cause the circuit to short. Therefore, you can see based on this formula, that the more the value of resistor R2 increases, the greater the voltage output.


LM Datasheet PDF – Fairchild Semiconductor

Product is in volume production 0. This is where the regulated voltage in this case, 5 volts will come lm311. Retrieved 31 March General terms and conditions. V IN – V IN is the pin which receives the incoming voltage which is to be regulated down to a specified voltage.

The LM relates in the same way to the fixed 79xx regulators. Product is in volume production only to support customers ongoing production. Archived from the original PDF on 18 April Complete Technical Details can be found at darasheet LM datasheet given at the end of this page.

The same formulae can also be used to calculate the value of resistor for you required output voltage. Wikimedia Commons has media related to LM and Voltage regulator circuits. The below circuit is designed to take 12V you can supply up to 24V as input and regulate it from 1. You can vary the output voltage by simply varying the potentiometer. This is the pin which, again, receives incoming voltage which the chip will then regulate down.

Archived from the original on 17 December LM is a 3-terminal regulator IC and it is very simple to use.

LM317 Voltage Regulator

No availability reported, please contact our Sales office. These resistors determine the voltage that the voltage regulator adjusts to and outputs. Media Subscription Media Lm371.


Now the voltage output should be near 10V. No commitment taken to produce Proposal: For example, the input voltage pin can be fed 12V, which the regulator will regulate down to 10V.

This is the pin which allows us to adjust the voltage to the level we want. It was designed by Robert “Bob” Pease. Key Features Output voltage range: Views Read Edit View history. The device can be configured to regulate the current to a load, rather than daatsheet voltage, by replacing the low-side resistor of the divider with the load itself.

You can adjust it to any voltage within the range that the voltage regulator supports. How the adjustment pin is connected determines the output voltage as follows.

LM3171 Datasheet

Support Center Complete list and gateway to support services and resource pools. Since we want 5 volts to be output, we must calculate which value of Datasgeet will yield an output of 5 volts.

This is the advantage of adjustable voltage regulators. C2 is needed if the device is far from any filter capacitors.