NCP1117ST33T3G
onsemi
Needs validationmedium risk
NCP1117ST33T3G is a close 3.3V 1A LDO candidate, pending package and pinout review.
Best Alternatives to AMS1117-3.3V
AMS1117-3.3V replacements should be screened as 3.3V fixed 1A LDOs in a SOT-223-3L footprint. Pinout, Vin rating, dropout, thermal limits, and output-cap stability still need confirmation.
AI replacement insight
Electrical riskmedium
some candidates have lower Vin max
Package riskhigh
SOT-223-3L not fully matched
Firmware risklow
no digital interface
Sourcing riskmedium
lifecycles vary
Can it be replaced directly?
Direct replacement for AMS1117-3.3V should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
Start with NCP1117ST33T3G, then verify package drawing and pin functions.
Main risk
Pinout and package equivalence are not verified.
Recommended alternatives
6Alternative comparison matrix
| Feature / factor | AMS1117-3.3V | NCP1117ST33T3G | LDL1117S33R | AMS1117-3.3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOT-223-3L | SOT-223/SOT-223-3 | - | - | SOT-223 — variant not proven |
| Pinout | 3 pins | 3 pins | - | - | 3 or 4 fields — record conflict |
| Voltage | 20V max in | 20V max in | - | - | 18V max in — lower max |
| Current | 1A | 1A | - | - | 1.2A — more current |
| Lifecycle | Active | Active | - | - | Active — in catalog |
| Temperature | not listed | - | -40 to 125C | - | -40 to 125C — target missing |
| Application | 1117 LDO slot | - | - | - | — |
Application & sourcing insights
Questions & answers
Verified drop-in options for AMS1117-3.3V 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.