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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LM can be used as a precision current regulator. Linear regulators inherently waste power, the power dissipated is the current passed multiplied by the voltage difference between input and output.

LMH/NOPB from Texas Instruments

Further, both line and load regulation are better than. LMH datasheet and specification datasheet Download datasheet. 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. Accidenti come scotta questo transistor. In addition to higher performance than fixed regulators, the.

Failure to do this may cause the circuit to short. The alternative is to use a switching voltage regulator which is usually more efficient but has a larger footprint and datasheft a larger number of associated components.


Download datasheet 2Mb Share this page. Page 17 Regulator Full output datashset not available at high input-output voltages High Current Adjustable Regulator 17 Power Follower www. From Wikipedia, the free encyclopedia. Wikimedia Commons has media related to LM and Voltage regulator circuits.

The Datasjeet is designed to compensate for these fluctuations internally, making such measures unnecessary. Like the LM, each 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 ” ground “.

LM117H – LM117 3-Terminal Adjustable Voltage Regulator Datasheet

By using this site, you agree to the Terms of Use and Privacy Policy. Page 8 Line Transient Response www. Layout Top Side Note: In packages lm117y 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.

This is the trade-off for using linear regulators which are a simple way to provide a stable voltage with few additional components. The LM has three pins: 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.


For large voltage differences, the energy lost as heat can ultimately be greater than that provided to the circuit. Linear integrated circuits Voltage regulation. The output current is that resulting from dropping the reference voltage across the resistor.

Retrieved from ” https: Included on the chip are current limit, thermal overload.

National Semiconductor

Page 18 Current Regulator 1. Maximum Allowable Power Dissipation vs. In use an LM commonly requires a heat sink to prevent the operating temperature rising too high.

REF The reference voltage is impressed across program resistor R1 and, since the voltage is constant, a constant current I They are exceptionally easy to use. Page 12 Layout Top Side Note: The guaranteed specifications apply only for the test conditions listed. For more National Semiconductor product information and proven design tools, visit the following Web sites at: Besides replacing datsheet regulators, the LM is useful in a.