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Best Alternatives to NCP1117DT33RKG

Package: TO-252-3, DPak (2 Leads + Tab), SC-63onsemiVoltage Regulators - LinearPackage: Tape & Reel (TR); Cut Tape (CT); Digi-Reel®Output Type: FixedNumber of Regulators: 1Voltage - Input (Max): 20VVoltage - Output (Min/Fixed): 3.3V

NCP1117DT33RKG is a popular 3.3V, 1A LDO voltage regulator in a DPAK package from onsemi. When searching for alternatives, key considerations include package compatibility, output current, and input voltage range.

AI replacement insight

Electrical risklow

Low if V/I specs are matched or exceeded. Medium for parametric relaxed parts.

Package riskhigh

High if package is not DPAK/TO-252, as it requires a board redesign.

Firmware risklow

Not applicable for this simple linear regulator.

Sourcing riskmedium

Medium when switching to a different manufacturer; requires requalification.

Can it be replaced directly?

Direct replacement for NCP1117DT33RKG should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

The best path is to use another 1117-family LDO in a DPAK/TO-252 package with at least 1A output current, such as NCV1117DT33T5G.

Main risk

The main risk is using a part with a lower output current (e.g., 0.8A) or a different package (e.g., SOT-223), which would cause circuit failure or require a board redesign.

Recommended alternatives

3
NCV1117DT33T5G package
NCV1117DT33T5G

onsemi

Needs validationlow risk

A strong alternative from the same manufacturer with identical key specs, package, and a wider operating temperature range.

View details

Alternative comparison matrix

Feature / factorNCP1117DT33RKGNCV1117DT33T5GMC33269DT-3.3GLM1117RS-3.3Compatibility / risk
PackageDPAKDPAKDPAKTO-252DPAK / TO-252 — Package is identical.; MC33269DT-3.3G: Package is identical.; LM1117RS-3.3: TO-252 is a compatible DPAK package.
Voltage3.3V3.3V3.3V3.3V3.3V — Output voltage is identical.; MC33269DT-3.3G: Output voltage is identical.; LM1117RS-3.3: Output voltage is identical.
Current1.0A1.0A0.8A1.0A1.0A / 0.8A — Output current is identical.; MC33269DT-3.3G: Lower output current.; LM1117RS-3.3: Output current is identical.
Temperature0°C to +125°C-40°C to +125°C---40°C to +125°C — Wider operating temperature range.
ApplicationCommercialAEC-Q100--AEC-Q100 — Automotive qualified part.
Manufactureronsemi--TCTC — Cross-vendor part.

Application & sourcing insights

Questions & answers

Verified drop-in options for NCP1117DT33RKG 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.