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The LM series of adjustable 3-terminal positive voltage ative complement, see LM series data sheet. LM/LMA/LM Package Options. Part. Datasheets, LM/N Datasheet. Design Resources, Development Tool Selector. Featured Product, LMSeries, Adjustable, Three-Pin Positive Voltage. LMH Datasheet, LM National Semiconductor 3-Terminal Adjustable Voltage Regulator Datasheet.

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The LM is designed to compensate for these fluctuations internally, making such measures unnecessary. Wikimedia Commons has media related to LM and Voltage regulator circuits. Included on the chip are current limit, thermal overload. For applications requiring greater output current, see LM Failure to do this may cause the circuit to short.

Of Outputs 1 No. 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 V ref e.

Further, both line and load regulation are better than. This is the trade-off for using linear regulators which are a simple way to provide a stable voltage with few additional components.

Download datasheet 2Mb Share this page. All other trademarks are the property of their respective owners. Output capacitors in the range.


They are exceptionally easy to use. Archived from the original PDF on 18 April In other projects Wikimedia Commons. In addition to higher performance than fixed regulators, datashewt.

National Semiconductor – datasheet pdf

For more National Semiconductor product information and proven design tools, visit the following Web sites at: Page 17 Regulator Full output current not available at high input-output voltages High Current Adjustable Regulator 17 Power Follower www. Besides replacing fixed regulators, the LM is useful in a.

Archived from the original on 17 December Regulator Full output current not available at high input-output voltages High Current Adjustable Regulator 17 Power Follower www. 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. LM series offers full overload protection available only in.

The LM negative complement to the Datasjeet regulates voltages below, rather than above, the reference.

The output current is that resulting from dropping the reference voltage across the resistor. Because of this, the error term in the formula cannot be ignored and the value of the low-side resistor becomes more critical. In use an LM commonly requires a heat sink to prevent the operating temperature rising too high.

National Semiconductor

The LM is an adjustable analogue to the popular 78xx fixed regulators. Linear regulators inherently waste power, the power dissipated is the current passed multiplied by the voltage difference between input and output.


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. Page 18 Current Regulator 1. An optional output ca. Accidenti come scotta questo transistor. REF The reference voltage is impressed across program resistor R1 and, since the voltage is constant, a constant current I LMH datasheet and specification datasheet.

Page 8 Line Transient Response www. From Wikipedia, the free encyclopedia. Full output current not available at high input-output voltages. Also, it datasbeet an especially simple adjustable switching reg. Also, the LM is packaged in.

LM117H – LM117 3-Terminal Adjustable Voltage Regulator Datasheet

For large voltage differences, the energy lost as heat can ultimately be greater than that provided to the circuit. Elcodis is a trademark of Elcodis Company Ltd. The LM relates in the same way to the fixed 79xx regulators.

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