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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Output capacitors in the range. Page 12 Layout Top Side Note: Higher regulated voltages are obtained by connecting the adjustment pin to a resistive voltage divider between the output and ground.

Because some quiescent current flows from the adjustment pin of the device, an error term is added:. This page was last edited on 6 Julyat For applications requiring greater output current, see LM Views Read Edit View history.

National Semiconductor – datasheet pdf

Failure to do this may cause the circuit to short. How the adjustment pin is connected determines the output voltage as follows.

Maximum Allowable Power Dissipation vs. In other projects Wikimedia Commons. Retrieved 31 March 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 “.

The guaranteed specifications apply only for the test conditions listed. Page 18 Current Regulator 1.

National Semiconductor

For large voltage differences, the energy lost as heat can ultimately be greater than that provided to the circuit. It was designed by Robert “Bob” Pease. Regulator Full output current not available at high input-output voltages High Current Adjustable Regulator 17 Power Follower www.


Prev Next 3-Terminal Adjustable Regulator. Also, the LM is packaged in. Archived from the original PDF on 31 March Application Hints In operation, the LM develops a nominal 1. Included on the chip are current limit, thermal overload.

LMH datasheet and specification 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.

Because of this, the error term in the formula cannot be ignored and the value of the low-side resistor becomes more critical. By using this site, you agree to the Terms of Use and Privacy Policy.

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 relates in the same way to the fixed 79xx regulators. All other trademarks are the property of their respective owners.

LMH National Semiconductor, LMH Datasheet

Ratasheet output current is that resulting from dropping the reference voltage across the resistor. Elcodis is a trademark of Elcodis Company Ltd. For more National Semiconductor product information and proven design tools, visit the following Web sites at: Wikimedia Commons has media related to LM and Voltage regulator circuits.


The LM is an adjustable analogue to the popular 78xx fixed regulators. Layout Top Side Note: LM can be used as a precision current regulator. Full output current not available at high input-output voltages. Page 8 Line Transient Response www.

Of Outputs 1 No. LM series offers full overload protection available only in. If the adjustment pin is connected to ground the output pin delivers a regulated voltage of 1.

Linear regulators inherently waste power, the power dissipated is the current passed multiplied by the voltage difference between input and output. However, the 78xx device’s quiescent current is substantially higher and less stable. The LM is a popular adjustable positive linear voltage regulator. The LM is designed to compensate for these fluctuations internally, making such measures unnecessary.

The LM datasheet of adjustable 3-terminal positive voltage. Also, it makes an especially simple adjustable switching reg. In addition to higher performance than fixed regulators, the. From Wikipedia, the free encyclopedia. Accidenti come scotta questo transistor.

An optional output ca. They are exceptionally easy to use. 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 l,117h useful in a.

Archived from the original on 17 December