AMS1117-3.3
Advanced Monolithic Systems
Needs validationlow risk
A strong alternative with matching key electrical parameters and package from Advanced Monolithic Systems.
Best Alternatives to NCP1117LPST33T3G
Find suitable replacements for the onsemi NCP1117LPST33T3G, a 3.3V/1A LDO in a SOT-223 package. This guide reviews pin-compatible options, functional alternatives, and highlights key parameters to verify for a successful substitution.
AI replacement insight
Electrical riskmedium
Many clones have lower max input voltage (e.g., 12V or 15V vs 18V). Quiescent current and PSRR can also vary.
Package risklow
Most SOT-223 packages for 1117 regulators share a standard footprint and pinout, but verification is still necessary.
Sourcing riskhigh
The market has many unbranded or poorly specified clones. Stick to reputable manufacturers and distributors.
Can it be replaced directly?
Direct replacement for NCP1117LPST33T3G should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
Use a verified AMS1117-3.3, as it's a common cross-reference with matching specs. Always verify the pinout from the datasheet before layout or assembly.
Main risk
The primary risk is using a clone with a lower maximum input voltage, which could lead to device failure if the system's input exceeds the substitute's rating.
Recommended alternatives
3Alternative comparison matrix
| Feature / factor | NCP1117LPST33T3G | AMS1117-3.3 | SCJT1117B-3.3-A | NCV1117DT33T5G | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOT-223 | SOT-223 | SOT-223 | DPAK | SOT-223 / DPAK — Package matches, pinout assumed standard for 1117 series.; SCJT1117B-3.3-A: Package matches.; NCV1117DT33T5G: Different package and footprint. |
| Voltage | 18V | 18V | 3.3V | 3.3V | 18V / 3.3V — Max input voltage matches.; SCJT1117B-3.3-A: Output voltage matches.; NCV1117DT33T5G: Output voltage matches. |
| Current | 1.0A | 1.0A | 1.0A | 1.0A | 1.0A — Output current matches.; SCJT1117B-3.3-A: Output current matches.; NCV1117DT33T5G: Output current matches. |
Application & sourcing insights
Questions & answers
Verified drop-in options for NCP1117LPST33T3G 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.