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Best Alternatives to AMS1117-5.0V

Package: SOT-223, TO-252, SOT-89MSKSEMIPMIC - Voltage Regulators - LinearOutput Voltage: 5.0 VOutput Current: 1 ADropout Voltage: 1.3 V @ 1 AInput Voltage Range: 15 VOutput Voltage Accuracy: 2 %

AMS1117-5.0V is a popular 1A, 5.0V low-dropout (LDO) regulator in SOT-223, TO-252, and SOT-89 packages. This page reviews and compares potential substitutes, highlighting pin-compatible options and functional alternatives.

AI replacement insight

Package riskhigh

High risk if selecting outside the 1117 family or a non-matching package.

Electrical riskhigh

High risk with non-LDO parts due to higher dropout voltage.

Sourcing risklow

The 1117-5.0 is a common, multi-sourced component family.

Can it be replaced directly?

Direct replacement for AMS1117-5.0V 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 AMS1117-5.0V, then review parametric alternatives for package and electrical fit.

Main risk

The main risk is selecting a non-LDO regulator (e.g., a 7805) which has a different package, pinout, and higher dropout voltage, requiring a board redesign.

Recommended alternatives

2
CJT1117B-5.0 package
CJT1117B-5.0

Jiangsu Changjing Electronics Technology Co., Ltd.

Needs validationlow risk

A strong, pin-compatible LDO with matching package, current, and improved dropout/temperature specs.

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Alternative comparison matrix

Feature / factorAMS1117-5.0VCJT1117B-5.0LD1117-5.0Alt 3Compatibility / risk
PackageSOT-223, TO-252, SOT-89SOT-223-TO-252, SOT-223, SOT-89 — Package options match target.
Current1.0A1.0A-1.0A — Output current matches.
Dropout Voltage1.3V @ 1A1.15V @ 1A-1.2V @ 1A — Slightly better dropout performance.
Temperature-40°C to 85°C-40°C to 125°C--40°C to 125°C — Wider operating temperature range.

Application & sourcing insights

Questions & answers

Verified drop-in options for AMS1117-5.0V 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.