LMR51430XFDDCR
Texas Instruments
Needs validationlow risk
Pin-compatible alternative from the same family with identical core specs; differs only in light-load operating mode.
Best Alternatives to LMR51430XDDCR
The LMR51430XDDCR is a versatile 3A synchronous buck converter from Texas Instruments, operating from 4.5V to 36V in a SOT-23-6 package. It is ideal for a wide range of industrial and automotive applications requiring high efficiency.
AI replacement insight
Electrical riskmedium
Control mode (PFM/FPWM) and switching frequency differences require review.
Package risklow
Several candidates share the SOT-23-6 package, but pinout must always be verified.
Firmware risklow
These are analog-controlled regulators; no firmware is involved.
Can it be replaced directly?
Direct replacement for LMR51430XDDCR should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
Start with Datasheet verified or Strong match candidates for LMR51430XDDCR, then review parametric alternatives for package and electrical fit.
Main risk
The main risk when substituting is ensuring the candidate's input voltage range and control scheme (e.g., PFM vs. FPWM) match the application's requirements.
Recommended alternatives
3Alternative comparison matrix
| Feature / factor | LMR51430XDDCR | LMR51430XFDDCR | LMR51430YFDDCR | ETA8113S2G | Compatibility / risk |
|---|---|---|---|---|---|
| Voltage | 4.5V to 36V | 4.5V to 36V | 4.5V to 36V | 4.5V to 18V | 4.5V to 36V / 4.5V to 18V — Input voltage range matches.; LMR51430YFDDCR: Input voltage range matches.; ETA8113S2G: Max input voltage is lower. |
| Current | 3A | 3A | - | 3A | 3A — Output current matches.; ETA8113S2G: Output current matches. |
| Switching Frequency | 500kHz | 500kHz | 1.1MHz | 500kHz | 500kHz / 1.1MHz — Switching frequency matches.; LMR51430YFDDCR: Requires recalculating external components.; ETA8113S2G: Switching frequency matches. |
| Control Mode | PFM | FPWM | FPWM | - | FPWM — Different light-load mode affects efficiency.; LMR51430YFDDCR: Different light-load mode affects efficiency. |
| Package | SOT-23-6 | SOT-23-6 | SOT-23-6 | SOT23-6 | SOT-23-6 / SOT23-6 — Package matches, pinout is compatible per datasheet family.; LMR51430YFDDCR: Package matches, pinout likely compatible.; ETA8113S2G: Package matches, pinout requires verification. |
Application & sourcing insights
Questions & answers
Verified drop-in options for LMR51430XDDCR 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.