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Best Alternatives to AMS1117-3.3(LX)

Package: SOT223LXPMIC - Voltage Regulators - LinearOutput Voltage: 3.3 VOutput Current: 1 ADropout Voltage: 1.45 V (typ) at 1AOperating Temperature: -40 °C to 85 °CPackage Type: SOT223

Finding a replacement for the AMS1117-3.3(LX) LDO involves matching its 3.3V output, 1A current, and SOT223 package. Several alternatives exist, but careful review of max input voltage and pinout is crucial.

AI replacement insight

Electrical riskmedium

Several candidates have lower max input voltage, posing a risk of damage if not verified.

Package riskmedium

While some candidates match the SOT223 package, others require a full board redesign.

Can it be replaced directly?

Direct replacement for AMS1117-3.3(LX) should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

Start with Datasheet verified or Strong match candidates for AMS1117-3.3(LX), then review parametric alternatives for package and electrical fit.

Main risk

The main risk is mismatched maximum input voltage. Several candidates have lower ratings (12V or 15V) than the target's 18V.

Recommended alternatives

3
SSP7903P33FR package
SSP7903P33FR

SIPROIN

Needs validationlow risk

A potential pin-compatible alternative in a SOT223 package with a higher maximum input voltage of 40V.

View details

Alternative comparison matrix

Feature / factorAMS1117-3.3(LX)SSP7903P33FRAMS1117-3.3(SOT-223)SCJT1117B-3.3-ACompatibility / risk
PackageSOT223SOT223SOT-223SOT-223SOT223 / SOT-223 — Package matches target.; AMS1117-3.3(SOT-223): Package matches target.; SCJT1117B-3.3-A: Package matches target.
Voltage18V40V3.3V3.3V40V / 3.3V — Higher max input voltage provides more design margin.; AMS1117-3.3(SOT-223): Output voltage matches.; SCJT1117B-3.3-A: Output voltage matches.
Current1.0A1.0A1.0A1.0A1.0A — Output current matches.; AMS1117-3.3(SOT-223): Output current matches.; SCJT1117B-3.3-A: Output current matches.

Application & sourcing insights

Questions & answers

Verified drop-in options for AMS1117-3.3(LX) 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.