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Best Alternatives to LM1117F-5.0

Package: SOT-89-3Tak Cheong Electronics (Holdings) Co., LimitedPower Management (PMIC)Output Voltage: 5VOutput Current: 1ADropout Voltage: 1V @ 1AInput Voltage (Max): 20VPSRR: 75dB @ 120Hz

The LM1117F-5.0 is a 5V, 1A low-dropout (LDO) linear regulator in a compact SOT-89-3 package. Finding a direct replacement requires matching its electrical characteristics, package, and pinout.

AI replacement insight

Package riskhigh

All candidates have different packages (SOT-223, DPAK) requiring a new PCB layout.

Electrical riskmedium

Some alternatives (7805 series) have higher dropout voltage, impacting performance.

Sourcing risklow

onsemi candidates are widely available from multiple distributors.

Can it be replaced directly?

Direct replacement for LM1117F-5.0 should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

Select a functional alternate from the 1117 family, like NCP1117ST50T3G, and redesign the PCB layout for its SOT-223 package.

Main risk

The primary risk is physical incompatibility; all reviewed alternatives are in different packages, requiring a mandatory PCB layout change.

Recommended alternatives

4
NCP1117ST50T3G package
NCP1117ST50T3G

onsemi

Needs validationhigh risk

A strong functional alternative in a different (SOT-223) package.

View details

Alternative comparison matrix

Feature / factorLM1117F-5.0NCP1117ST50T3GNCV1117ST50T3GNCV7805BDTRKGCompatibility / risk
PackageSOT-89-3SOT-223SOT-223DPAK-3SOT-223 / DPAK-3 — Requires PCB redesign. Different footprint and thermal properties.; NCV1117ST50T3G: Requires PCB redesign. Different footprint and thermal properties.; NCV7805BDTRKG: Requires PCB redesign. Different footprint and thermal properties.; MC7805CDTRKG: Requires PCB redesign. Different footprint and thermal properties.
Voltage20V20V20V35V20V / 35V — Maximum input voltage matches.; NCV1117ST50T3G: Maximum input voltage matches.; NCV7805BDTRKG: Higher max input voltage provides more design margin.; MC7805CDTRKG: Higher max input voltage provides more design margin.
Current1.0A1.0A1.0A1.0A1.0A — Output current matches.; NCV1117ST50T3G: Output current matches.; NCV7805BDTRKG: Output current matches.; MC7805CDTRKG: Output current matches.
ApplicationCommercial-AEC-Q100AEC-Q100AEC-Q100 — Automotive grade may be an upgrade.; NCV7805BDTRKG: Automotive grade may be an unnecessary cost for commercial apps.

Application & sourcing insights

Questions & answers

Verified drop-in options for LM1117F-5.0 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.