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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 DĀ²PAK packages intended for use as positive adjustable voltage regulators.

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How to use LM Key Features Output voltage range: Limited Engineering samples available Preview: The LM negative complement to the LM regulates voltages below, rather than above, the reference. In use an LM commonly requires a heat sink to prevent the operating temperature rising too high. Communications Equipment, Computers and Peripherals.

Product is in volume production. Product is in design feasibility stage. In our setup now, these are the values we’re going to use. Marketing proposal for customer feedback.

LM3171 Datasheet PDF – Fairchild Semiconductor

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. This is the advantage of adjustable voltage regulators.

Submitted by webmaster on 27 December IoT for Smart Things.

Who We Are Management. Adjustable – The Adjustable pin Adj is the pin which allows for adjustable voltage output. Generally, with regulators, unless they are low drop out regulators, you want the input voltage to be about 2 volts higher.


From Wikipedia, the free encyclopedia. These resistors determine the voltage that the voltage regulator adjusts to and outputs. Higher regulated voltages are obtained by connecting the adjustment pin to a resistive voltage divider between the output and ground.

LM317 Voltage Regulator

Product is in volume production 0. They are designed to supply more than 1. Linear integrated circuits Voltage regulation.

For example, the input voltage pin can be fed 12V, which the regulator will regulate down to 10V. Because of this, the error term in the formula cannot be ignored and the value of the low-side resistor datwsheet more critical.

To feed a circuit the regulated 5 volts, we just connect it to the output pin.

LM Voltage Regulator Pinout, Features, Equivalent & Datasheet

The output current is that resulting from dropping the reference voltage across the resistor. General terms and conditions. So therefore, since we want 5 volts as output, we will feed into this regulator 7 volts. Product is under characterization.

Adjustable 3-terminal positive voltage regulator Output voltage can be set to range from 1. Getting started with datasheef 5: Archived from the original PDF on 18 April Distributor Name Region Stock Min. Datashedt this circuit, we want a regulated 5VDC as output. The LM is an adjustable analogue to the popular 78xx fixed regulators.


To adjust output, we swap out resistor R2 value for a different resistance. No commitment taken to design or produce NRND: Now datasheef out the R2 resistor and place a 1.

Looking from the front of the voltage regulator, the first pin on the left is the Adjustable Pin, the middle is Vout, and the last pin on the right is V IN. Like the LM, dataaheet of the 78xx regulators is designed to adjust the output voltage until it is some fixed voltage above the adjustment pin which in this case is labelled ” dataeheet “. Remember, voltage regulators are just devices that regulate voltage down to a certain level.

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.

Support Center Complete list and gateway to support services and resource pools. The LM is a popular adjustable positive linear voltage regulator. The below circuit is designed to take 12V you can supply up to 24V as input and regulate it from 1. Menu Products Explore our product portfolio.