Data Sheet

LM317L-N
SNVS775J –MARCH 2000–REVISED MARCH 2013 www.ti.com
Trim Procedure:
— If V
OUT
is 23.08V or higher, cut out R3 (if lower, don't cut it out).
— Then if V
OUT
is 22.47V or higher, cut out R4 (if lower, don't).
— Then if V
OUT
is 22.16V or higher, cut out R5 (if lower, don't).
This will trim the output to well within ±1% of 22.00 V
DC
, 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.
Figure 40. Regulator With Trimmable Output Voltage
*R1–R4 from thin-film network,
Beckman 694-3-R2K-D or similar
Figure 41. Precision Reference with Short-Circuit Proof Output
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