Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2All trademarks are the property of. LMAT Texas Instruments | LMAT-ND DigiKey Electronics. LMAT Linear Digi-Key Part Number, LMAT-ND Datasheets, LMA Datasheet . LMAT datasheet, LMAT pdf, LMAT data sheet, datasheet, data sheet, pdf, National Semiconductor, 3-Terminal Adjustable Regulator.

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An optional output ca.

LMAT National Semiconductor, LMAT Datasheet

The LM is designed to compensate for these fluctuations internally, making such measures unnecessary. Xatasheet 18 Current Regulator 1. The output current is that resulting from dropping the reference voltage across the resistor.

LMAT datasheet and specification datasheet. The LM series of adjustable 3-terminal positive voltage.

For applications requiring greater output current, see LM This is the trade-off for using linear regulators which are a simple way to provide a stable voltage with few additional components. Elcodis is a trademark of Elcodis Company Ltd. 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.


Page 27 Notes 27 www. Of Pins 3 Output Current 1. Page 8 Line Transient Response www. Besides replacing fixed regulators, the LM is useful in a. Page 17 Regulator Full output current not available at high input-output voltages High Current Adjustable Regulator 17 Power Follower www.

REF The reference voltage is impressed across program resistor R1 and, since the voltage is constant, a constant current I Failure to do this may cause the circuit to short.

LM can be used as a precision current regulator. The LM is an adjustable analogue to the popular 78xx fixed regulators. Also, the LM is packaged in.

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.

(PDF) LM317AT Datasheet download

Maximum Allowable Power Dissipation vs. Copy your embed code fatasheet put on your site: It was designed by Robert “Bob” Pease. Because some quiescent current flows from the adjustment pin of the device, an error term is added:.

For large voltage differences, the energy lost as heat can ultimately be greater than that provided to the circuit.

Because of this, the error term in the formula cannot be ignored and the value of the low-side resistor becomes lm317wt critical. Archived from the original on 17 December Included on the chip are current limit, thermal overload. This page was last edited on 6 Julyat Linear regulators inherently waste power, the power dissipated is the current passed multiplied by the voltage difference llm317at input and output.


Accidenti come scotta questo transistor.

How the adjustment pin is connected determines the output voltage as follows. All other trademarks are the property of their respective owners. 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.

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 “. Retrieved 31 March The LM has three pins: The LM is a popular adjustable positive linear voltage regulator. Also, it makes an especially simple adjustable switching reg.

However, the 78xx device’s quiescent current is substantially higher and less stable. Download datasheet 2Mb Share this page. In other projects Wikimedia Commons.