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 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. Archived from the original PDF on 31 March Page 18 Current Regulator 1.

Prev Next 3-Terminal Adjustable Regulator. Retrieved from ” https: 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 “. They are exceptionally easy to use.

The output current is that resulting from dropping the reference voltage across the resistor. Copy your embed code and put on your site: Output capacitors in the range. The LM series of adjustable 3-terminal positive voltage.

For large voltage differences, the energy lost as heat can ultimately be greater than that provided to the circuit. Linear regulators inherently waste power, the power dissipated is the current passed multiplied by the voltage difference between input and output. Accidenti come scotta questo transistor.


However, the 78xx device’s quiescent current is substantially higher and less stable. This is the trade-off for using linear regulators which are a simple way to provide a stable voltage with few additional components.

It was designed by Robert “Bob” Pease. Linear integrated circuits Voltage regulation.

Of Outputs 1 No. In use an LM commonly requires a heat sink to prevent the operating temperature rising too high. For applications requiring greater output current, see LM Failure to do this may cause the circuit to short.

REF The reference voltage is impressed across program resistor R1 and, since the voltage is constant, a constant dataasheet I Normally, no capacitors are needed unless the device is sit.

Views Read Edit View history. The guaranteed specifications apply only for the test conditions listed. Archived from the datssheet PDF on 18 April Layout Top Side Note: Application Hints In operation, the LM develops a nominal 1.

LM series offers full overload protection available only in. In addition to higher performance than fixed regulators, the. For guaranteed specifications and test conditions, see the Electrical Characteristics.

National Semiconductor – datasheet pdf

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. If the datasueet pin is connected to ground the output pin delivers a regulated voltage of 1. Also, it makes an especially simple adjustable switching reg. Download datasheet 2Mb Share this page. Elcodis is a trademark of Elcodis Company Ltd.


Page 27 Notes 27 www. All other trademarks are the property datashet their respective owners. The LM is an adjustable analogue to the popular 78xx fixed regulators. In other projects Wikimedia Commons. Included on the chip are current limit, thermal overload. Regulator Full output lm171h not available at high input-output voltages High Current Adjustable Regulator 17 Power Follower www.

LM117H – LM117 3-Terminal Adjustable Voltage Regulator Datasheet

Because of this, the error term in the formula cannot be ignored and the value of the low-side resistor becomes more critical. Page 8 Line Transient Response www. LMH datasheet and datashert datasheet Download datasheet. Higher regulated voltages are obtained by connecting the adjustment pin to a resistive voltage divider between the output and ground.

The LM is designed to compensate for these fluctuations internally, making such measures unnecessary. Also, the LM is packaged in.