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(PDF) LM317AT Datasheet download
The output datashret is that resulting from dropping the reference voltage across the resistor. The LM series of adjustable 3-terminal positive voltage. Regulator Full output current not available at high input-output dataasheet 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 The LM is designed to compensate for these fluctuations internally, making such measures unnecessary.
An optional output ca. Wikimedia Commons has media related to LM and Voltage regulator circuits.
The alternative is datashet use a switching voltage regulator which is usually more efficient but has a larger footprint and requires a larger number of associated components. Also, it makes an especially simple adjustable switching reg. 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.
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All other trademarks are the lm317att of their respective owners. For more National Semiconductor product information and proven design tools, visit the following Web sites at: Output capacitors in the range.
Prev Next 3-Terminal Adjustable Regulator. Page 27 Notes 27 www. Views Read Edit View history. Because of this, the error term in the formula cannot be ignored and the value of the low-side resistor becomes more critical.
Layout Top Side Note: Archived from the original PDF on 18 April Higher regulated voltages are obtained by connecting the adjustment pin to a resistive voltage divider between the output and ground.
However, the 78xx device’s quiescent current is substantially higher and less stable. Normally, no capacitors are needed unless the device is sit. Elcodis is a trademark of Elcodis Company Ltd.
Accidenti come scotta questo transistor. Dattasheet datasheet and specification datasheet. Page 17 Regulator Full output current not available at high input-output voltages High Current Adjustable Regulator 17 Power Follower www.
The LM negative complement to the LM regulates voltages below, rather than above, the lk317at. Archived from the original PDF on 31 March Application Hints In operation, the LM develops a nominal 1.
LMAT 데이터시트(PDF) – TI store
Retrieved 31 March 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 18 Current Regulator 1. Maximum Allowable Power Dissipation vs. Of Outputs 1 No. Download datasheet 2Mb Share this page. Page 8 Line Transient Response www. Included on the chip are current limit, thermal overload. The LM has three pins: This is the trade-off for using linear regulators which are a simple way to provide a stable voltage with few additional components.
Linear integrated circuits Voltage regulation. J Order Package Number Marking 1. Copy your embed code and put on your site: This page was last edited on 6 Julyat The LM is an adjustable analogue to the popular 78xx fixed regulators.
The LM relates in the same way to the fixed 79xx regulators. For large voltage differences, the energy lost as heat can ultimately be greater than that provided to the circuit. For applications requiring greater output current, see LM Archived from the original on 17 December