LM is guaranteed over a 0 C to a70 C temperature . Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is. LM datasheet, LM circuit, LM data sheet: TI – OPERATIONAL AMPLIFIERS/BUFFERS,alldatasheet, datasheet, Datasheet search site for Electronic. Part Number: LM, Maunfacturer: National Semiconductor, Part Family: LM, File type: PDF, Document: Datasheet – semiconductor.
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The LM relates in the same way to the fixed 79xx regulators. Failure to do this may cause the circuit to short.
This page was last edited on 6 Julyat How the adjustment pin is connected determines the output voltage as follows. Archived from the original on datasyeet December It was designed by Robert “Bob” Pease.
Higher regulated voltages are obtained by connecting the adjustment pin to a resistive voltage divider between the output and ground. Linear regulators inherently waste power, the datashet dissipated is the current passed multiplied by the voltage difference between input and output.
Retrieved from ” https: If the adjustment pin is connected to ground the output pin delivers a regulated voltage of 1. The LM is a popular adjustable positive linear voltage regulator.
Operational Amplifiers – National Semiconductor
The mechanism used is similar enough that a voltage divider can be used in the same way as with the LM and the output follows the same formula, using the regulator’s fixed voltage for Ml312 ref e.
Linear integrated circuits Voltage regulation. The LM negative complement to the LM regulates voltages below, rather than above, the reference. For large voltage differences, the energy lost as heat can ultimately be greater than that provided to the circuit.
datasheer However, the 78xx device’s quiescent current is substantially higher and less stable. Wikimedia Commons has media related to LM and Voltage regulator circuits. 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.
LM312 Datasheet PDF – Texas Instruments
The device catasheet 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. In use an LM commonly requires a heat sink to prevent the operating temperature rising too high.
This is the trade-off for using linear regulators which are a simple way to provide a stable voltage with few additional components. Views Read Edit View history. Retrieved 31 March Archived from the original PDF on 31 March Archived from the original PDF on 18 April In other projects Wikimedia Commons.
The LM has three pins: The LM is designed to compensate for these fluctuations internally, making such measures unnecessary. From Wikipedia, the lm3112 encyclopedia. Datashete 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.
Because some quiescent current flows from the adjustment pin of the device, an error term is added:. Accidenti come scotta questo transistor. The LM is an adjustable analogue to the popular 78xx fixed regulators. The output current is that resulting from dropping the reference voltage across datxsheet resistor.
Because of this, the error term in the formula cannot be ignored and the value of the low-side resistor becomes more critical.