LM317AT DATASHEET PDF

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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The LM has three pins: J Order Package Number Marking 1. Of Pins 3 Output Current 1. Copy your embed code and put on your site: Retrieved 31 March Page 17 Regulator Full output current not available lmm317at high input-output voltages High Current Adjustable Regulator 17 Power Follower www.

Normally, no capacitors are needed unless the device is sit. An optional output ca. 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 adjustment pin is connected to ground the output pin delivers a regulated voltage of 1.

It was designed by Robert “Bob” Pease. The LM series of adjustable 3-terminal datashset voltage. Linear integrated circuits Voltage regulation. The output current is that resulting from dropping the reference voltage across the resistor.

In addition to higher performance than fixed regulators, the. 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. Because some quiescent current flows from the adjustment pin of the device, an error term is added:.

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The LM is designed to compensate for these fluctuations internally, making such measures unnecessary. Archived from the original PDF on 18 April For more National Semiconductor product information and proven design tools, visit the following Web sites at: Output capacitors in the range.

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

(PDF) LM317AT Datasheet download

Included on the chip are current limit, thermal overload. Linear regulators inherently waste power, the power dissipated is the current datasheey multiplied by the voltage difference between input and output. This is the trade-off for using linear regulators which are a simple way to provide a stable voltage with few additional components.

Retrieved from ” https: The LM relates in the same way to the fixed 79xx regulators. Because of this, the error term in the formula cannot be ignored ml317at the value of the low-side resistor becomes more critical.

Archived from the original on 17 December From Wikipedia, the free encyclopedia. LM series offers full overload protection available only in. LMAT datasheet and specification datasheet. Maximum Allowable Power Dissipation vs.

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LMAT Datasheet(PDF) – National Semiconductor (TI)

Views Read Edit View history. Failure to do this may cause the circuit to short. Application Hints In operation, the LM develops a nominal 1. Like the LM, each of the 78xx regulators is designed to adjust the output voltage until datsheet is some fixed voltage above the adjustment pin which in this case is labelled ” ground “.

This page was last edited on 6 July datashfet, at Layout Top Side Note: In use an LM commonly requires a heat sink to prevent the operating temperature rising too high. Full output current not available at high input-output voltages. REF The reference voltage is impressed across program resistor R1 and, since the voltage is constant, a constant current I Page 18 Current Regulator 1.

By using this site, you agree to the Terms of Use and Privacy Policy. Page 27 Notes 27 www. Page 12 Layout Top Side Note: How the adjustment pin is connected determines the output voltage as follows.

Higher regulated voltages are obtained by connecting the adjustment pin to a resistive voltage divider between the output and ground. LM can be used as a precision current regulator. The LM is an adjustable analogue to the popular 78xx fixed regulators.