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Best Alternatives to LMR51610XDBVR

Package: SOT-23-6Texas InstrumentsPMIC - Voltage Regulators - DC DC Switching RegulatorsInput Voltage Range: 4V to 65VOutput Current: 1ASwitching Frequency: 400kHzTopology: Buck (Step-Down)Output Type: Adjustable

LMR51610XDBVR is a wide-input 65V, 1A synchronous buck converter from TI. Finding a direct replacement requires careful matching of its high input voltage and temperature range.

AI replacement insight

Electrical riskhigh

Substitutes have much lower input voltage ratings (18-28V vs 65V).

Package risklow

All viable candidates share the SOT-23-6 package, but pinout must be verified.

Firmware risklow

These are analog DC/DC converters, so no firmware changes are expected.

Can it be replaced directly?

There are no direct, drop-in replacements for LMR51610XDBVR due to its unique combination of a high 65V input voltage and 150°C temperature range in a SOT-23-6 package.

Best replacement path

Consider TPS54302DDCR for systems where Vin < 28V, as its switching frequency matches the target. All other candidates require significant redesign.

Main risk

The primary risk is catastrophic failure from overvoltage if a substitute with a lower input voltage rating is used in a system designed for 65V.

Recommended alternatives

4
TPS54302DDCR package
TPS54302DDCR

Texas Instruments

Needs validationmedium risk

A potential alternative with matching frequency, but only for low voltage (<28V) applications.

View details

Alternative comparison matrix

Feature / factorLMR51610XDBVRTPS54302DDCRTPS54302DDCTTPS54202DDCRCompatibility / risk
PackageSOT-23-6SOT-23-6--SOT-23-6 — Package matches.
Voltage4V - 65V4.5V - 28V--4.5V - 28V — Max input voltage is significantly lower.
Current1A3A--3A — Higher output current capability.
Temperature-40°C to 150°C-40°C to 125°C---40°C to 125°C — Max operating temperature is lower.
Switching Frequency400kHz400kHz--400kHz — Frequency matches, simplifying redesign.

Application & sourcing insights

Questions & answers

For applications with input voltage below 28V, TPS54302DDCR offers a similar function with matching switching frequency, but requires careful review of all operating conditions.