LMR51430XDDCR
Texas Instruments
Needs validationlow risk
Pin-compatible SOT-23-6 alternative with matching frequency and wider input voltage range; requires engineering review.
Best Alternatives to ETA8113S2G
ETA8113S2G is a popular 18V, 3A synchronous buck converter in a SOT23-6 package. Finding a replacement involves matching the input voltage, output current, 500kHz switching frequency, and SOT23-6 pinout.
AI replacement insight
Electrical riskmedium
Control loop differences require verification of stability and transient response.
Package risklow
Pin-compatible SOT-23-6 options are available, minimizing physical layout changes.
Sourcing risklow
Alternatives from major vendors like Texas Instruments are widely available.
Can it be replaced directly?
LMR51430XDDCR is a potential pin-to-pin replacement for ETA8113S2G, but requires engineering review due to different control architectures which affect stability and transient response.
Best replacement path
Start with Datasheet verified or Strong match candidates for ETA8113S2G, then review parametric alternatives for package and electrical fit.
Main risk
The primary risk is the difference in control topology (e.g., Adaptive COT vs. Peak Current Mode), which can affect system stability and transient performance.
Recommended alternatives
3Alternative comparison matrix
| Feature / factor | ETA8113S2G | LMR51430XDDCR | LMR51430XFDDCR | TMI3244T | Compatibility / risk |
|---|---|---|---|---|---|
| Pinout | SOT-23-6 | Pin-compatible | Pin-compatible | Not compatible | Pin-compatible / Not compatible — Verified via datasheet review.; LMR51430XFDDCR: Verified via datasheet review.; TMI3244T: Requires PCB redesign. |
| Voltage | 4.5V to 18V | 4.5V to 36V | 4.5V to 36V | 4.5V to 18V | 4.5V to 36V / 4.5V to 18V — Wider input range is a safe upgrade.; LMR51430XFDDCR: Wider input range is a safe upgrade.; TMI3244T: matched |
| Current | 3A | 3A | - | 4A | 3A / 4A — matched; TMI3244T: Higher output current capability. |
| Application | 500kHz (Adaptive COT, PFM) | 500kHz (Peak Current Mode, PFM) | 500kHz (FPWM) | 550kHz | 500kHz (Peak Current Mode, PFM) / 500kHz (FPWM) / 550kHz — Control topology differs (Current Mode vs COT), affects transient response. PFM mode matches target's light-load efficiency goal.; LMR51430XFDDCR: Lacks PFM mode for light-load efficiency, which target has. May increase quiescent current.; TMI3244T: Slightly different frequency may require tuning passives. |
Application & sourcing insights
Questions & answers
Verified drop-in options for ETA8113S2G 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.