SLAA934A December   2019  – December 2024 TPS732-Q1

 

  1.   1
  2.   Trademarks
  3. 1Overview
  4. 2Functional Safety Failure In Time (FIT) Rates
    1. 2.1 SOT-223 (DCQ) Package
    2. 2.2 VSON (DRB) Package
    3. 2.3 SOT-23 (DBV) Package
  5. 3Failure Mode Distribution (FMD)
  6. 4Pin Failure Mode Analysis (Pin FMA)
    1. 4.1 SOT-223 (DCQ) Package
    2. 4.2 VSON (DRB) Package
    3. 4.3 SOT-23 (DBV) Package
  7. 5Revision History

4.2 VSON (DRB) Package

Figure 4-2 shows the TPS732-Q1 pin diagram for the VSON (DRB) package. For a detailed description of the device pins, see the Pin Configuration and Functions section in the TPS732-Q1 data sheet.

TPS732-Q1 Pin Diagram (VSON (DRB) Package) Figure 4-2 Pin Diagram (VSON (DRB) 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
OUT 1 Current limit is triggered, and the device can repeatedly enter and exit thermal shutdown depending on power dissipation. B
NC 2 No effect. Normal operation. D
NR/FB 3 [Adjustable Output] Device stops regulating. VOUT becomes equal to VIN minus dropout because the pass FET is driven as hard as possible. B
GND 4 No effect. Normal operation. D
EN 5 The device is disabled, resulting in no output voltage. B
NC 6 No effect. Normal operation. D
NC 7 No effect. Normal operation. D
IN 8 Power is not supplied to the device. System performance depends on upstream current limiting. B
Table 4-7 Pin FMA for Device Pins Open-Circuited
Pin Name Pin No. Description of Potential Failure Effects Failure Effect Class
OUT 1 Output voltage is disconnected from load. B
NC 2 No effect. D
NR/FB 3 [Adjustable Output] Error amplifier input is left floating, output voltage is not equal to set voltage. B
GND 4 Device biasing has no current path. The device is not operational and does not regulate. B
EN 5 Device potentially disables. B
NC 6 No effect. D
NC 7 No effect. D
IN 8 No output voltage. B
Table 4-8 Pin FMA for Device Pins Short-Circuited to Adjacent Pin
Pin Name Pin No. Shorted to Pin No. Description of Potential Failure Effects Failure Effect Class
OUT 1 NC 2 No effect. Normal operation. D
NC 2 NR/FB 3 No effect. D
NR/FB 3 GND 4 [Adjustable Output] Device stops regulating. VOUT becomes equal to VIN minus dropout because the pass FET is always on. B
GND 4 EN 5 Output is forced OFF, VOUT is 0.0V B
EN 5 NC 6 No effect. Normal operation. D
NC 6 NC 7 No effect. Normal operation. D
NC 7 IN 8 No effect. Normal operation. D
Table 4-9 Pin FMA for Device Pins Short-Circuited to Supply
Pin Name Pin No. Description of Potential Failure Effects Failure Effect Class
OUT 1 Regulation is not possible. VOUT = VIN. If VIN exceeds 5.5V, damage is possible. B
NC 2 No effect. Normal operation. D
NR/FB 3 [Adjustable Output] FB pin is damaged if VIN is higher than 6V. The device having no output voltage is possible. B
GND 4 No output voltage. System performance depends on the upstream current limit. B
EN 5 Device is always enabled. Regulation is possible. B
NC 6 No effect. Normal operation. D
NC 7 No effect. Normal operation. D
IN 8 No effect. Normal operation. D