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LM series offers full overload protection available only in. The LM has three pins: Page 18 Current Regulator 1. Also, the LM is packaged in. For large voltage differences, the energy lost as heat can ultimately be greater than that provided to the circuit.
Archived from the original PDF on 18 April The LM negative complement to the LM regulates voltages below, rather than above, the reference. The output current is that resulting from dropping the reference voltage across the resistor. For more National Semiconductor product information and proven design tools, visit the following Web sites at: Because some quiescent current flows from the adjustment pin of the device, an error term is added:.
LM can be used as a precision current regulator. J Order Package Number Marking 1. 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.
They datashest exceptionally easy to use. Retrieved from ” https: Retrieved 31 March It was designed by Robert “Bob” Pease. Failure to do this may cause the circuit to short. How the adjustment pin is connected determines the dayasheet voltage as follows. The LM is an adjustable analogue to the popular 78xx fixed regulators.
In addition to higher performance than fixed regulators, the. 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. The LM series of adjustable 3-terminal positive voltage. Elcodis is a trademark of Elcodis Company Ltd.
Further, both line and load regulation are better than. Linear integrated circuits Voltage regulation. Page 17 Regulator Full output current not available at high input-output voltages High Current Adjustable Regulator 17 Power Follower www.
For applications requiring greater output current, see LM Wikimedia Commons has media related to LM and Voltage regulator circuits. Archived from the original PDF on 31 March In other projects Wikimedia Commons. This is the trade-off for using linear regulators which are a simple way to provide a stable voltage with few additional components.
Page 27 Notes 27 www. Download datasheet 2Mb Share this page. Application Hints In operation, the LM develops a nominal 1. Linear regulators inherently waste power, the power dissipated datssheet the current passed multiplied by the voltage difference between input and output. All other trademarks are the property of their respective owners.
Maximum Allowable Power Dissipation vs. Prev Next 3-Terminal Adjustable Regulator.
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Also, it makes an especially simple adjustable switching reg. 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 “. Output capacitors in the range.
In use an LM commonly requires a heat sink to prevent the operating temperature rising too high.