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.

Author: Kalabar Mezibei
Country: Anguilla
Language: English (Spanish)
Genre: Photos
Published (Last): 19 December 2009
Pages: 447
PDF File Size: 19.23 Mb
ePub File Size: 18.40 Mb
ISBN: 697-3-72778-762-4
Downloads: 63766
Price: Free* [*Free Regsitration Required]
Uploader: Bat

Archived from the original on 17 December The output current is that resulting from dropping the reference voltage across the resistor. Of Outputs 1 No.

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. Layout Top Side Note: Failure to do this may cause the circuit to short. Page 12 Layout Top Side Note: 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.

All other trademarks are the property of their respective owners. In use an LM commonly requires a heat sink to prevent the operating temperature rising too high. Maximum Allowable Power Dissipation vs. Views Read Edit View history.

(PDF) LM317AT Datasheet download

The LM relates in the same way to datashet fixed 79xx regulators. LM can be used as a precision current regulator. In other projects Wikimedia Commons.

Retrieved from ” https: Linear regulators inherently waste power, the power dissipated is the current passed multiplied by the voltage difference between input and output. For applications requiring greater output current, see LM By using this site, you agree to the Terms of Use and Privacy Policy.


Also, the LM is packaged in. Higher regulated voltages are obtained by connecting the adjustment pin to a resistive voltage divider between the output and ground. From Wikipedia, the free encyclopedia. Accidenti come scotta questo transistor. Normally, no capacitors are needed unless the device is sit. Regulator Full output current not available at high input-output voltages High Current Adjustable Regulator 17 Power Follower www.

Page 27 Notes 27 www. Like the LM, each of the 78xx dahasheet 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 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. Because some quiescent current flows from the adjustment pin of the device, an error term is added:.

How the adjustment pin is connected determines the output voltage as follows. The LM has three pins: Prev Next 3-Terminal Adjustable Regulator. Copy your embed code and put on your site: Archived from the original PDF on 18 April An optional output ca.

Further, both line and load regulation are better dtasheet. If the adjustment pin is connected to ground the output pin delivers a regulated voltage of 1. Elcodis is a trademark of Elcodis Company Ltd. They are exceptionally easy to use. Linear integrated circuits Voltage regulation. It was designed by Robert “Bob” Pease. Because of this, the error lmm317at in the formula cannot be ignored and the value of the low-side resistor becomes more critical.


Retrieved 31 March Also, it makes an especially simple adjustable switching lm317aat. Page 8 Line Transient Response www. However, the 78xx device’s quiescent current is substantially higher and less stable.

LMAT Datasheet pdf – 3-Terminal Adjustable Regulator – National Semiconductor

For more National Semiconductor product information and proven design tools, visit the following Web sites at: LMAT datasheet and specification datasheet. Of Pins 3 Output Current 1. This is the trade-off for using linear regulators which are a simple way to provide a stable voltage with few additional components.

Page 17 Regulator Full output current not available at high input-output voltages High Current Adjustable Regulator 17 Datsaheet Follower www. Wikimedia Commons has media related to LM and Voltage regulator circuits. Full output current datasheeet available at high input-output voltages. The LM negative complement to the LM regulates voltages datsheet, rather than above, the reference. Download datasheet 2Mb Share this page. 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.

The LM is an adjustable analogue to the popular 78xx fixed regulators.