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

4.1 SOT-223 Package

Figure 4-1 shows the TPS7B69-Q1 pin diagram for the SOT-223 package. For a detailed description of the device pins, see the Pin Configuration and Functions section in the TPS7B69-Q1 data sheet.

GUID-24740EF1-6DB4-4C55-AED3-6C9AB406E7FE-low.gif Figure 4-1 Pin Diagram (SOT-223 Package)
Table 4-2 Pin FMA for Device Pins Short-Circuited to Ground
Pin Name Pin No. Description of Potential Failure Effects Failure Effect Class
IN 1 No output voltage. System performance depends on the upstream current limit. B
GND 2 No effect. Normal operation. D
OUT 3 Current limit is triggered, and the device can repeatedly enter and exit thermal shutdown depending on power dissipation. B
GND 4 No effect. Normal operation. D
Table 4-3 Pin FMA for Device Pins Open-Circuited
Pin Name Pin No. Description of Potential Failure Effects Failure Effect Class
IN 1 Power is not supplied to the device, resulting in no output voltage. B
GND 2 A floating GND pin can result in incorrect voltage regulation or no output voltage. B
OUT 3 The output is disconnected from the load. B
GND 4 A floating GND pin can result in incorrect voltage regulation or no output voltage. B
Table 4-4 Pin FMA for Device Pins Short-Circuited to Adjacent Pin
Pin Name Pin No. Shorted to Description of Potential Failure Effects Failure Effect Class
IN 1 GND No output voltage. System performance depends on the upstream current limit. B
GND 2 OUT Current limit is triggered, and the device can repeatedly enter and exit thermal shutdown depending on power dissipation. B
OUT 3 GND Current limit is triggered, and the device can repeatedly enter and exit thermal shutdown depending on power dissipation. B
Table 4-5 Pin FMA for Device Pins Short-Circuited to supply
Pin Name Pin No. Description of Potential Failure Effects Failure Effect Class
IN 1 No effect. Normal operation. D
GND 2 No output voltage. System performance depends on the upstream current limit. B
OUT 3 The output is not regulated. VOUT = VIN. The OUT pin can be damaged if the absolute maximum rating (7 V) is violated. B/A
GND 4 No output voltage. System performance depends on the upstream current limit. B