Is there a pin-compatible replacement for LMR51450SDRRR?

While LM5160ADNTR uses a similar 12-pin WSON package, its electrical performance, particularly the 2A output current versus the target's 5A, means it is not a direct pin-compatible replacement without significant engineering validation.

What risks should I check before replacing LMR51450SDRRR?

Key risks include electrical stress and performance degradation. Verify the substitute's output current, input voltage range, and operating temperature meet your design's needs. A lower current rating is the most critical risk.

LMR51450SDRRR Alternatives, Datasheet & Cross Reference | Texas Instruments

LMR51450SDRRR is a 36V, 5A synchronous step-down converter from Texas Instruments. Finding a direct drop-in replacement is challenging due to its high current and wide temperature range.

AI replacement insight

Electrical riskhigh

Significant downgrade in output current and operating temperature.

Package risklow

Package is similar, but footprint requires verification.

Can it be replaced directly?

No direct, drop-in replacement for LMR51450SDRRR is available among the candidates. All options have critical parametric differences.

Best replacement path

Consider a redesign with a part that meets the 5A current requirement, as no suitable parametric alternatives were found.

Main risk

The primary risk is insufficient output current, as the closest candidate provides only 2A compared to the required 5A.

Recommended alternatives

Functional alternative in a similar package but with a much lower 2A output current and narrower temperature range.

View details

Alternative comparison matrix

Feature / factor	LMR51450SDRRR	LM5160ADNTR	Compatibility / risk
Package	WSON-12	WSON (12)	WSON (12) — Similar package type and pin count, but footprint verification is required.
Current	5 A	2 A	2 A — Significantly lower output current, major downgrade.
Voltage	4 V to 36 V	4.5 V to 65 V	4.5 V to 65 V — Wider input voltage range.
Temperature	-40°C to 150°C	-40°C to 125°C	-40°C to 125°C — Reduced maximum operating temperature.

Application & sourcing insights

Questions & answers

No direct drop-in replacement was found. LM5160ADNTR is a functional alternative in the same package but has a significantly lower 2A output current, requiring careful review of the application's load requirements.