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LM317L Fiches technique(PDF) 13 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
No de pièce LM317L
Description  3-Terminal Adjustable Regulator
PDF  17 Pages
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Fabricant  NSC [National Semiconductor (TI)]
Site Internet  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM317L Fiches technique(HTML) 13 Page - National Semiconductor (TI)

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Typical Applications (Continued)
Precision High Voltage Regulator
DS009064-30
Q1, Q2: NSD134 or similar
C1, C2: 1µF, 200V mylar**
*Heat sink
**Mylar is a registered trademark of DuPont Co.
Tracking Regulator
DS009064-31
A1 = LM301A, LM307, or LF13741 only
R1, R2 = matched resistors with good TC tracking
Regulator With Trimmable Output Voltage
DS009064-32
Trim Procedure:
—If VOUT is 23.08V or higher, cut out R3 (if lower, don’t cut it out).
— Then if VOUT is 22.47V or higher, cut out R4 (if lower, don’t).
— Then if VOUT is 22.16V or higher, cut out R5 (if lower, don’t).
This will trim the output to well within ±1% of 22.00 VDC, without any of
the expense or uncertainty of a trim pot (see LB-46). Of course, this
technique can be used at any output voltage level.
www.national.com
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