LM317L MDA National Semiconductor, LM317L MDA Datasheet - Page 13

• Manufacturer Part Number: LM317L MDA
• Description: 3-Terminal Adjustable Regulator
• Manufacturer: National Semiconductor

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