SFFS451 September   2022 TPS7B69-Q1

 

  1.   Trademarks
  2. 1Overview
  3. 2Functional Safety Failure In Time (FIT) Rates
    1. 2.1 SOT-223 Package
    2. 2.2 SOT-23 Package
  4. 3Failure Mode Distribution (FMD)
  5. 4Pin Failure Mode Analysis (Pin FMA)
    1. 4.1 SOT-223 Package
    2. 4.2 SOT-23 Package

3 Failure Mode Distribution (FMD)

The failure mode distribution estimation for the TPS7B69-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 Modes Failure Mode Distribution (%)
VOUT high (following VIN) 15
VOUT not in specification (voltage or timing) 60
VOUT low (no output) 20
Short circuit any two pins 5