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

4.2 SOT-23 Package

Figure 4-2 shows the TPS7B69-Q1 pin diagram for the SOT-23 package. For a detailed description of the device pins, see the Pin Configuration and Functions section in the TPS7B69-Q1 data sheet.

GUID-5AE8DB8D-947D-4FA7-8B9D-0A7C33038100-low.gif Figure 4-2 Pin Diagram (SOT-23 Package)
Table 4-6 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
NC 2 No effect. Normal operation. D
GND 3 No effect. Normal operation. D
GND 4 No effect. Normal operation. D
OUT 5 Current limit is triggered, and the device can repeatedly enter and exit thermal shutdown depending on power dissipation. B
Table 4-7 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
NC 2 No effect. Normal operation. D
GND 3 A floating GND pin can result in incorrect voltage regulation or no output voltage. B
GND 4 A floating GND pin can result in incorrect voltage regulation or no output voltage. B
OUT 5 The output is disconnected from the load. B
Table 4-8 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 NC No effect. Normal operation. D
NC 2 GND No effect. Normal operation. D
GND 3 GND No effect. Normal operation. D
GND 4 OUT Current limit is triggered, and the device can repeatedly enter and exit thermal shutdown depending on power dissipation. B
Table 4-9 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
NC 2 No effect. Normal operation. D
GND 3 No output voltage. System performance depends on the upstream current limit. B
GND 4 No output voltage. System performance depends on the upstream current limit. B
OUT 5 The output is not regulated. VOUT = VIN. The OUT pin can be damaged if the absolute maximum rating (7 V) is violated. B/A