SY8291ABC
silergy
Needs validationhigh risk
SY8291ABC is a buck candidate for lower-voltage LGS5145 applications.
Best Alternatives to LGS5145
LGS5145 is a 55V 1A SOT23-6 buck regulator. No pin-compatible replacement is confirmed from the provided candidates.
AI replacement insight
Electrical riskhigh
Vin rating is often lower.
Package riskmedium
SOT23-6 matches, pinout is unknown.
Firmware risklow
No firmware interface shown.
Sourcing riskmedium
PDF checks are pending.
Can it be replaced directly?
No confirmed pin-compatible replacement is available.
Best replacement path
Review SY8291ABC only for designs limited to 40V input.
Main risk
Most candidates do not meet the 55V input rating.
Recommended alternatives
1Alternative comparison matrix
| Feature / factor | LGS5145 | SY8291ABC | Alt 2 | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOT23-6 | SOT23-6 | SOT23-6 — same package name | ||
| Pinout | 6 pins | 6 pins | 6 pins — functions not shown | ||
| Voltage | 4.5-55V | 5-40V | 5-40V — not for 55V rail | ||
| Current | 1A | 1.2A | 1.2A — higher rating | ||
| Temperature | -40 to 125C | -40 to 125C | -40 to 125C — range matches |
Application & sourcing insights
Questions & answers
From this set, SY8291ABC is the closest limited candidate, but only for input rails at or below 40V.