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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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Because of this, the error term in the formula cannot be ignored and the value of the low-side resistor becomes more critical. Maximum Allowable Power Dissipation vs. Page 8 Line Transient Response www.

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 LM relates in the same way to the fixed 79xx regulators. By using this site, you agree to the Terms of Use and Privacy Policy. Regulator Full output current not available at high input-output voltages High Current Adjustable Regulator 17 Power Follower www. 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.


An optional output ca.

DRVAIRGPT from Texas Instruments

How the adjustment pin is connected determines the output voltage as follows. If the adjustment pin is connected to ground the output pin delivers lm317qt regulated voltage ,m317at 1. In use an LM commonly requires a heat sink to prevent the operating temperature rising too high.

LM series offers full overload protection available only in. Of Pins 3 Output Current 1. Page 12 Layout Top Side Note: Of Outputs 1 No. Linear integrated circuits Voltage regulation.

Wikimedia Commons has media related to LM and Voltage regulator circuits. Prev Next 3-Terminal Adjustable Regulator. 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.

LMAT datasheet and specification datasheet.

Accidenti come scotta questo transistor. For large voltage differences, the energy lost as heat can ultimately be greater than that provided to the circuit. For more National Semiconductor product information and proven design tools, visit the following Web sites at: 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. Page 17 Regulator Full output current not available at high input-output voltages High Current Adjustable Regulator 17 Power Follower www.


Included on the chip are current limit, thermal overload. Because some quiescent current flows from the adjustment pin dataaheet the device, an error term is added:. REF The reference voltage is impressed across program resistor R1 and, since the voltage is constant, a constant current I Output capacitors in the range. J Order Package Number Marking 1. Normally, no capacitors are needed unless the device is sit.

(PDF) LM317AT Datasheet download

Lm317xt 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. Further, both line and load regulation are better than. Higher regulated voltages are obtained by connecting the adjustment pin to a resistive voltage divider between the output and ground. Retrieved 31 March Application Hints In operation, the LM develops a nominal 1. Views Read Edit View history.

The LM has three pins: They are exceptionally easy to use. Archived from the original on 17 December Download datasheet 2Mb Share this page.