Is there a pin-compatible replacement for LMR54410FDBVR?

No pin-compatible replacement has been confirmed. While several candidates use the same SOT-23-6 package, their pin functions have not been verified against the LMR54410FDBVR. All potential substitutes require a datasheet review to confirm pinout.

What risks should I check before replacing LMR54410FDBVR?

The main risks are electrical and thermal. You must verify that your application's maximum input voltage is well below the substitute's rating (e.g., <27V for SY8201CABC) and that the operating environment will not exceed its lower temperature limit (e.g., 125°C). Also, check the pinout and control loop differences.

LMR54410FDBVR Alternatives, Datasheet & Cross Reference | Texas Instruments

The Texas Instruments LMR54410FDBVR is a robust synchronous step-down converter designed for high-reliability applications, featuring a wide 4V to 45V input range and 1A output in a SOT-23-6 package. Finding a direct substitute is challenging due to its high voltage and temperature ratings.

AI replacement insight

Electrical riskhigh

All candidates have much lower Vin(max) ratings (18-27V vs 45V).

Package riskmedium

While the package is SOT-23-6, pinout compatibility is not confirmed and must be verified.

Sourcing risklow

Candidates are from different manufacturers, which may improve supply chain diversity if electrically suitable.

Can it be replaced directly?

No, there is no direct, drop-in replacement for the LMR54410FDBVR among the reviewed parts. All candidates have significantly lower maximum input voltage and temperature ratings.

Best replacement path

No direct or near-equivalent replacement was found among the candidates. The best path is to search for other converters specifically rated for >=45V input and >=125°C operation, or use a candidate like SY8201CABC if the application's maximum voltage is confirmed to be below 27V.

Main risk

The primary risk is electrical overstress from applying a voltage higher than the substitute's maximum rating (e.g., 18V or 27V), which is far below the original part's 45V tolerance.

Recommended alternatives

A functional alternative in the same package, but with significantly lower input voltage and temperature ratings. Requires careful review.

View details

Alternative comparison matrix

Feature / factor	LMR54410FDBVR	SY8201CABC	SM8102ABC	Compatibility / risk
Package	SOT-23-6	SOT23-6	SOT23-6	SOT23-6 — Package matches, but pinout requires verification.; SM8102ABC: Package matches, but pinout requires verification.
Voltage	4V to 45V	4.5V to 27V	4.2V to 18V	4.5V to 27V / 4.2V to 18V — Significantly lower max input voltage.; SM8102ABC: Severely limited max input voltage.
Current	1A	1A	2A	1A / 2A — Output current matches.; SM8102ABC: Higher output current capability.
Temperature	-40°C to 150°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C — Reduced maximum operating temperature.; SM8102ABC: Reduced maximum operating temperature.
Switching Frequency	1.1MHz	1.15MHz	500kHz	1.15MHz / 500kHz — Switching frequency is a very close match.; SM8102ABC: Significantly different frequency requires external component changes.

Application & sourcing insights

Questions & answers

No direct replacement was found. The closest functional alternative with significant limitations is the SY8201CABC, but it only supports up to 27V input. A new search for parts matching the 45V input and 150°C temperature ratings is recommended.