SFFS189A September 2021 – June 2024 LM63440-Q1 , LM63460-Q1
The failure mode distribution estimation for the LM634X0-Q1 in Table 3-1 comes from the combination of common failure modes listed in standards such as IEC 61508 and ISO 26262, the ratio of sub-circuit function size and complexity and from best engineering judgment.
The failure modes listed in this section reflect random failure events and do not include failures due to misuse or overstress.
| Die Failure Modes | Failure Mode Distribution |
|---|---|
| SW no output | 45% |
| SW output not in specification – voltage or timing | 40% |
| SW power FET stuck on | 5% |
| PGOOD false trip, fails to trip | 5% |
| Short circuit any two pins | 5% |