LM317DCYR
UMW
Needs validationmedium risk
LM317DCYR is the closest adjustable regulator candidate for LM317G.
Best Alternatives to LM317G
LM317G is an adjustable positive regulator. The closest listed candidate is LM317DCYR, but pinout review is still required.
AI replacement insight
Electrical riskmedium
LM317DCYR ratings align; LM1117S-ADJ is lower rated.
Package riskmedium
SOT-223 matches, but pinout/tab are not confirmed.
Firmware risklow
No firmware interface.
Sourcing riskmedium
LM317DCYR catalog manufacturer data conflicts.
Can it be replaced directly?
Direct replacement for LM317G should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
Review LM317DCYR first, then confirm pin functions, tab, thermal limits, and manufacturer record.
Main risk
Pinout is not proven and the best candidate has catalog manufacturer inconsistency.
Recommended alternatives
2Alternative comparison matrix
| Feature / factor | LM317G | LM317DCYR | LM1117S-ADJ | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOT-223 | SOT-223 | SOT-223 | SOT-223 — same package name; LM1117S-ADJ: same package name | |
| Pinout | missing | 4 pins | 3 pins | 4 pins / 3 pins — target pinout absent; LM1117S-ADJ: pin functions not shown | |
| Voltage | 40V in, 1.2-37V out | 40V in, 1.25-37V out | 20V in | 40V in, 1.25-37V out / 20V in — range is close; LM1117S-ADJ: half input rating | |
| Current | 1.5A | 1.5A | 1A | 1.5A / 1A — same rating; LM1117S-ADJ: lower load rating | |
| Temperature | 0°C to 125°C | 0°C to 125°C | -40°C to 125°C | 0°C to 125°C / -40°C to 125°C — same range; LM1117S-ADJ: wider low end |
Application & sourcing insights
Questions & answers
Verified drop-in options for LM317G are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.