AMS1117-3.3
Kexin
Needs validationmedium risk
A common cross-family alternate with a higher input voltage, but requires review of pin count and temperature specs.
Best Alternatives to LD1117AG-33-AA3-A-R
The LD1117AG-33-AA3-A-R is a popular 3.3V, 1A LDO voltage regulator in a SOT-223 package. Several pin-compatible alternatives from the 1117 family exist, but require careful review of operating temperature and dropout voltage.
AI replacement insight
Electrical riskmedium
Temperature range and dropout voltage vary across alternates.
Package risklow
SOT-223 package and pinout are highly standardized for this family.
Sourcing risklow
The 1117 family is widely available from multiple vendors.
Can it be replaced directly?
No single drop-in replacement is guaranteed without review. The AMS1117-3.3 is a strong candidate, but requires verification of its temperature range.
Best replacement path
Cross-reference to other manufacturers of the 1117 LDO family, such as the AMS1117-3.3 or LM1117S-3.3.
Main risk
The primary risk is a mismatch in the maximum operating temperature, which varies between manufacturers.
Recommended alternatives
3Alternative comparison matrix
| Feature / factor | LD1117AG-33-AA3-A-R | AMS1117-3.3 | LM1117S-3.3 | LM1117S-3.3(MS) | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOT-223 | SOT-223 | - | - | SOT-223 — Package and pin count match. |
| Pinout | 4 | 3/4 (conflicting data) | - | - | 3/4 (conflicting data) — Pin count data is inconsistent; standard 1117 pinout is likely but needs verification. |
| Voltage | 15V | 18V | - | - | 15V — Input and output voltages match. |
| Temperature | -20°C to +125°C | Varies by MFR | - | - | -40°C to 85°C — Maximum operating temperature is lower. |
| Dropout | 1.2V @ 1A | - | 1V @ 1A | - | 1.3V @ 1A — Dropout voltage is slightly higher. |
Application & sourcing insights
Questions & answers
The AMS1117-3.3 and LM1117S-3.3 are common cross-vendor family alternatives. All options require datasheet verification for your specific application needs.