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 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.

The LM relates in the same way to the fixed 79xx regulators. For example, the LM may receive 12V as the input and output a constant 10V as output. Here you see we connect two resistors to the voltage regulator. Who We Are Management.

LM Voltage Regulator Pinout, Features, Equivalent & Datasheet

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.

C2 is needed if the device is far from any filter capacitors. Archived from the original on 17 December Please contact our sales support for information on specific devices. Key Features Output voltage range: Darasheet started with eDesignSuite 5: General terms and conditions. It can supply more than 1. The below circuit is designed to take 12V you can supply up to 24V as input and regulate it from 1. They are designed to supply more than 1.


LM Datasheet PDF – Fairchild Semiconductor

The LM is designed to compensate for these fluctuations internally, making such measures unnecessary. The LM is an adjustable analogue to the popular 78xx fixed regulators.

Not Recommended for New Design. Complete Technical Details can be found at the LM datasheet given at the end of this page. Below is the pinout: Media Subscription Media Contacts. If the adjustment pin is connected to ground the output pin delivers a regulated voltage of 1. Generally, with regulators, unless they are low drop out regulators, you want the input voltage to be about 2 volts higher.

The capacitors C1 and C2 are used to clean up the power line. V IN – V IN is the pin which receives the incoming voltage which is to be regulated down to a specified voltage. Support Center Complete list and gateway to support services and resource pools.

It has many application circuits in its datasheet, but this IC is known for being used as a variable voltage regulator. We do this by changing the value of the resistor connected to the Adj pin of the voltage regulator. Lm1371 the adjustment pin is connected determines the output voltage as follows.

This capacitors helps smooth out the power supply line in case of abrupt current spikes. Lm317 swap out the R2 resistor and place a 1.


LM317 Voltage Regulator

In our setup now, these are the values we’re going to use. TL — Datassheet Reference Voltage. Product is in volume production only to support customers ongoing production.

Views Read Edit View history. Menu Products Explore our product portfolio. Because some quiescent current flows from the adjustment pin of the device, an error term is added:.

LM3171 Datasheet PDF – Fairchild Semiconductor

This page was last edited on 6 Julyat Lm171, you can see based on this formula, that the more the value of resistor R2 increases, the greater the voltage output. You can adjust it to any voltage within the range that the voltage regulator supports.

The input pin receives the incoming, unregulated voltage. The LM negative complement to the LM regulates voltages below, rather than above, the reference. 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. This is the pin which allows us to adjust the voltage to the level we want. Because of this, the error term in the formula cannot be ignored and the dahasheet of the low-side resistor becomes more critical.