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

4.1 SOT-223 (DCQ) Package

Figure 4-1 shows the TPS732-Q1 pin diagram for the SOT-223 (DCQ) 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 (SOT-223 (DCQ)) PackageFigure 4-1 Pin Diagram (SOT-223 (DCQ)) 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 Power is not supplied to the device. System performance depends on upstream current limiting. B
OUT 2 Current limit is triggered, and the device can repeatedly enter and exit thermal shutdown depending on power dissipation. B
GND 3 No effect. Normal operation. D
NR/FB 4 [Fixed Output] The internal reference cannot start. The device cannot turn on. B
EN 5 The device is disabled, resulting in no output voltage. B
Table 4-3 Pin FMA for Device Pins Open-Circuited
Pin Name Pin No. Description of Potential Failure Effects Failure Effect Class
IN 1 No output voltage. B
OUT 2 Output voltage is disconnected from load. B
GND 3 Device biasing has no current path. The device is not operational and does not regulate. B
NR/FB 4 [Fixed Output] Any noise-reduction benefits are lost. C
EN 5 Device potentially disables. B
Table 4-4 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
IN 1 OUT 2 Regulation is not possible. VOUT = VIN. If VIN exceeds 5.5V, damage is possible. B
OUT 2 GND 3 Regulation is not possible. The device operates at current limit. The device can cycle in and out of thermal shutdown. B
GND 3 NR/FB 4 Any noise-reduction benefits are lost. C
NR/FB 4 EN 5 The output voltage is incorrect. 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
OUT 2 Regulation is not possible. VOUT = VIN. If VIN exceeds 5.5V, damage is possible. B
GND 3 No output voltage. System performance depends on the upstream current limit. B
NR/FB 4 [Fixed Output] NR pin is damaged if VIN is higher than 6V. A
EN 5 Device is always enabled. Regulation is possible. B