TMI3113
TMI
Needs validationmedium risk
Functional alternative with matching frequency but a much narrower input voltage range.
Best Alternatives to ETA3499S2G
The ETA3499S2G is a versatile 3A synchronous buck converter with a wide 2.4V to 7.3V input range. While no direct drop-in replacements are confirmed, several functional alternatives are available that may be suitable after careful engineering review, particularly regarding input voltage and package compatibility.
AI replacement insight
Electrical riskhigh
Most candidates have a narrower input voltage range. Some have different switching frequencies affecting external components.
Package riskhigh
No candidate is confirmed to be pin-for-pin and footprint compatible. Board redesign is likely required for most options.
Firmware risklow
These are simple regulators with no firmware, so this risk is not applicable.
Can it be replaced directly?
No verified direct drop-in replacement has been identified. All candidates require careful review of electrical parameters and physical footprint.
Best replacement path
For 5V input systems, FP6373AS6CTR is a strong candidate if pinout is confirmed. For new designs, TI and ETA offer modern parts but will require a board respin.
Main risk
The primary risk is a mismatch in the input voltage range; many alternatives do not support the target's full 2.4V to 7.3V range.
Recommended alternatives
6Alternative comparison matrix
| Feature / factor | ETA3499S2G | TMI3113 | TMI3253SH | ETA3521FSG | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOT23-6L | TSOT23-6 | TSOT23-6 | SOT563 | TSOT23-6 / SOT563 — Similar package, but requires footprint and pinout verification.; TMI3253SH: Similar package, but requires footprint and pinout verification.; ETA3521FSG: Not a drop-in replacement, requires board redesign.; TLV62585PDRLR: Not a drop-in replacement, requires board redesign. |
| Voltage | 2.4V - 7.3V | 2.7V - 5.5V | 4.5V - 18V | 2.5V - 6.0V | 2.7V - 5.5V / 4.5V - 18V / 2.5V - 6.0V / 2.5V - 5.5V — Candidate has a significantly narrower input voltage range.; TMI3253SH: Higher minimum input voltage (4.5V vs 2.4V) makes it unsuitable for many applications.; ETA3521FSG: Candidate has a narrower input voltage range.; TLV62585PDRLR: Candidate has a narrower input voltage range. |
| Switching Frequency | 1MHz | 1MHz | 1MHz | 2MHz | 1MHz / 2MHz / 1.5MHz — Switching frequency matches.; TMI3253SH: Switching frequency matches.; ETA3521FSG: Higher frequency affects external components and efficiency.; TLV62585PDRLR: Different frequency affects external components and efficiency. |
| Current | 3.0A | 3.0A | 3.0A | 4.0A | 3.0A / 4.0A — Output current matches.; TMI3253SH: Output current matches.; ETA3521FSG: Higher output current provides more margin.; TLV62585PDRLR: Output current matches. |
Application & sourcing insights
Questions & answers
The best alternative depends on your application's input voltage. For 5V systems, FP6373AS6CTR is a strong candidate due to its matching frequency and similar package, but you must verify its narrower 2.7V-5.5V input range is acceptable. For new designs requiring a wider input range, consider a full redesign with a modern part from a major manufacturer like Texas Instruments.