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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Product is in design feasibility stage. For example, the input voltage pin can be fed 12V, which the regulator will regulate down to 10V. The output current is that resulting from dropping the reference voltage across the resistor. Retrieved from ” https: Product is in volume production. The LM is designed to compensate for these fluctuations internally, making such measures unnecessary. Therefore, V IN must be greater than 5 volts. This can help you find the exact datawheet value needed for a circuit.

The voltage that the adjustable regulator outputs is determined by the equation below: Computers and Peripherals Data Center. One easy way to do this daatasheet to use this online calculator to randomly substitute the value of resistors you have and check which output voltage you will get. If the adjustment pin is connected to ground the output pin delivers a regulated voltage of 1.

In this circuit, we want a regulated 5VDC as output. To find out more details about it, see the datasheet which is attached below: LM is a 3-terminal regulator IC and it is fatasheet simple to use. No availability reported, please contact our Sales office.


Complete Technical Details can be found at the LM datasheet given at the end of this page. In packages with a heat-dissipating mounting tab, such as TOthe tab is connected internally to the output pin which may make it necessary to electrically isolate the tab or the heat sink from other parts of the application circuit.

In use an LM commonly requires a heat sink to prevent the operating temperature rising too high. The nominal output voltage is selected by means of a resistive divider, making the device exceptionally easy to use and eliminating the stocking of many fixed regulators. C2 is needed if the device is far from any filter capacitors. The LM Voltage Regulator is a 3-terminal adjustable voltage regulator which can supply an output voltage adjustable from 1. Below is the pinout: This is the pin which allows us to adjust the voltage to the level we want.

LM3171 Datasheet

In our setup now, these are the values we’re going to use. Archived from the original PDF on 18 April Daatasheet to make it act as a variable voltage regulator we have to set variable voltages at pin 1 which can be done by using a potentiometer in the potential divider.

Product is in volume production 0. Views Read Edit View history. How to use LM 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. The alternative is to use a switching voltage regulator which is usually more efficient but has a larger footprint and requires a larger number of associated components. Retrieved 31 March We’re going to put 12 volts into the voltage regulator and regulate it down to 5V.

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In our circuit, a motor is connected as a load which consumes around mA you can connect any load up to 1. However, the 78xx device’s dtasheet current is substantially higher and less stable.

Product is under characterization. One notable drawback of this IC is that it has a voltage drop of about 2. Now swap out the R2 resistor and place a 1. ST Code of Conduct Blog. Because of this, the error term in the formula cannot be ignored and the value of the low-side resistor becomes more critical. IoT for Smart Things. You can adjust it to any voltage within datashewt range that the voltage regulator supports. This page was last edited on 6 Julyat Product is in design stage Target: They are designed to supply more than 1.

Accidenti come scotta questo transistor. The LM relates in the same way to the fixed 79xx regulators. Wikimedia Commons has media related to LM and Voltage regulator circuits.

LM Datasheet, PDF – Alldatasheet

The LM negative complement to the LM regulates voltages below, rather than above, the reference. It was designed by Robert “Bob” Pease. Remember, voltage regulators are just devices that regulate voltage down to a certain level.

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