LMR51430XDDCR
Texas Instruments
Needs validationlow risk
Pin-compatible family variant with identical specs, but uses PFM instead of FPWM control mode.
Best Alternatives to LMR51430XFDDCR
LMR51430XFDDCR is a 36V, 3A synchronous buck converter in a SOT-23-6 package. This page reviews pin-compatible and functional alternatives, highlighting key differences in control mode, switching frequency, and voltage ratings.
AI replacement insight
Electrical risklow
Family variants have predictable behavior, but control mode and frequency changes must be reviewed.
Package risklow
SOT-23-6 is a standard package; family variants share the same footprint and pinout.
Can it be replaced directly?
Direct replacement for LMR51430XFDDCR 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 LMR51430XFDDCR, then review parametric alternatives for package and electrical fit.
Main risk
The main risks involve parametric differences like control mode (PFM vs. FPWM) or switching frequency, which can require redesign of external passive components and affect EMI.
Recommended alternatives
4Alternative comparison matrix
| Feature / factor | LMR51430XFDDCR | LMR51430XDDCR | 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 significantly lower.; TMI3244T: Max input voltage is significantly lower. |
| Current | 3.0A | 3.0A | 3.0A | 3.0A | 3.0A / 4.0A — Output current matches.; LMR51430YFDDCR: Output current matches.; ETA8113S2G: Output current matches.; TMI3244T: Output current is higher. |
| Package | SOT-23-6 | SOT-23-6 | SOT-23-6 | SOT23-6 | SOT-23-6 / SOT23-6 — Package and pin count match.; LMR51430YFDDCR: Package and pin count match.; ETA8113S2G: Package matches, but pinout requires verification.; TMI3244T: Package matches, but pinout requires verification. |
| Application | 500kHz | 500kHz | 1.1MHz | 500kHz | 500kHz / 1.1MHz / 550kHz — Switching frequency matches.; LMR51430YFDDCR: Higher frequency requires review of external components and EMI.; ETA8113S2G: Switching frequency matches.; TMI3244T: Switching frequency is similar. |
Application & sourcing insights
Questions & answers
Verified drop-in options for LMR51430XFDDCR 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.