SFFS465A May   2022  – July 2026 TPS62901-Q1 , TPS62902-Q1 , TPS62903-Q1

 

  1.   1
  2. 1Overview
  3. 2Functional Safety Failure In Time (FIT) Rates
  4. 3Failure Mode Distribution (FMD)
  5. 4Pin Failure Mode Analysis (Pin FMA)
  6. 5Revision History

3 Failure Mode Distribution (FMD)

The failure mode distribution estimation for TPS629xx-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 resulting from misuse or overstress.

Table 3-1 Die Failure Modes and Distribution
Die Failure ModesFailure Mode Distribution (%)
SW output not in specification – voltage22
SW power HS or LS FET stuck on20
Power FET damage 36
PG false trip or fails to trip13
EN enable fails or false enable9