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LM317S/NOPB Datasheet(PDF) 23 Page - Texas Instruments

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Part # LM317S/NOPB
Description  LM117, LM317-N Wide Temperature Three-Pin Adjustable Regulator
PDF  51 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

LM317S/NOPB Datasheet(HTML) 23 Page - Texas Instruments

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LM317-N
23
LM117, LM317-N
www.ti.com
SNVS774Q – MAY 2004 – REVISED JUNE 2020
Product Folder Links: LM117 LM317-N
Submit Documentation Feedback
Copyright © 2004–2020, Texas Instruments Incorporated
Typical Applications (continued)
9.2.10 Low-Cost 3-A Switching Regulator
The LM317-N can be used in a switching buck regulator application in cost sensitive applications that require
high efficiency. The switch node above D1 oscillates between ground and VIN, as the voltage across sense
resistor R1 drives the power transistor on and off. Figure 28 exhibits self-oscillating behavior by negative
feedback through R6 and C3 to the ADJ pin of the LM317-N.
NOTE: †Solid tantalum
*Core—Arnold A-254168-2 60 turns
Figure 28. Low-Cost 3-A Switching Regulator



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