SFFSA74A March 2026 – May 2026 TPS62A212-Q1
4 Pin Failure Mode Analysis (Pin FMA)
This section provides a failure mode analysis (FMA) for the pins of the TPS62A2xx-Q1. The failure modes covered in this document include the typical pin-by-pin failure scenarios:
- Pin short-circuited to ground (see Table 4-2)
- Pin open-circuited (see Table 4-3)
- Pin short-circuited to an adjacent pin (see Table 4-4)
- Pin short-circuited to VIN (see Table 4-5)
Table 4-2 through Table 4-5 also indicate how these pin conditions can affect the device as per the failure effects classification in Table 4-1.
Table 4-1 TI Classification of Failure Effects
| Class | Failure Effects |
|---|---|
| A | Potential device damage that affects functionality. |
| B | No device damage, but loss of functionality. |
| C | No device damage, but performance degradation. |
| D | No device damage, no impact to functionality or performance. |
Figure 4-1 shows the TPS62A2xx-Q1 pin diagram. For a detailed description of the device pins please refer to the Pin Configuration and Functions section in the TPS62A2xx-Q1 datasheet.
Figure 4-1 Pin DiagramFollowing are the assumptions of use and the device configuration assumed for the pin FMA in this section:
- The assumption is that the device is running in the typical application, please refer to the Simplified Schematics in the TPS62A2xx-Q1 datasheet.
Table 4-2 Pin FMA for Device Pins Short-Circuited to Ground
| Pin Name | Pin No. | Description of Potential Failure Effects | Failure Effect Class |
|---|---|---|---|
| EN | 1 | The device operates as normal. The device is disabled. | B |
| AGND | 2 | The device operates as normal, but the accuracy of the output voltage becomes increasingly worse. | C |
| VIN | 3 | The device does not power up and there is no output voltage. | B |
| VIN | 4 | The device does not power up and there is no output voltage. | B |
| GND | 5 | The device operates as normal. | D |
| SW | 6 | The device is potentially damaged. | A |
| SW | 7 | The device is potentially damaged. | A |
| SW | 8 | The device is potentially damaged. | A |
| SW | 9 | The device is potentially damaged. | A |
| GND | 10 | The device operates as normal. | D |
| VIN | 11 | The device does not power up and there is no output voltage. | B |
| VIN | 12 | The device does not power up and there is no output voltage. | B |
| MODE/SYNC | 13 | The device operates as normal and enters the FPWM mode of operation. | B |
| PG | 14 | The device operates as normal, but there is a loss of indication on the PG pin. | B |
| VSET | 15 | The device operates as normal. The VSET pin defines the start-up voltage. | B |
| CONF | 16 | The device operates as normal. The CONF pin defines the switching frequency and output voltage. | B |
| COMP | 17 | The device operates as normal. The COMP pin defines the compensation setting. | B |
| VOS | 18 | The device operates at the maximum duty cycle operation and the output voltage is unregulated. | B |
| GND | 19 | The device operates as normal. | D |
Table 4-3 Pin FMA for Device Pins Open-Circuited
| Pin Name | Pin No. | Description of Potential Failure Effects | Failure Effect Class |
|---|---|---|---|
| EN | 1 | The pin is internally terminated with a 3MΩ resistor to GND. The device is disabled. | D |
| AGND | 2 | The device operates as normal, but the accuracy of the output voltage becomes increasingly worse. | C |
| VIN | 3 | The device operates as normal. The alternative VIN pins are still connected. | C |
| VIN | 4 | The device operates as normal. The alternative VIN pins are still connected. | C |
| GND | 5 | The device operates as normal. The alternative GND pins are still connected. | C |
| SW | 6 | The device operates as normal. The alternative SW pins are still connected. | C |
| SW | 7 | The device operates as normal. The alternative SW pins are still connected. | C |
| SW | 8 | The device operates as normal. The alternative SW pins are still connected. | C |
| SW | 9 | The device operates as normal. The alternative SW pins are still connected. | C |
| GND | 10 | The device operates as normal. The alternative GND pins are still connected. | C |
| VIN | 11 | The device operates as normal. The alternative VIN pins are still connected. | C |
| VIN | 12 | The device operates as normal. The alternative VIN pins are still connected. | C |
| MODE/SYNC | 13 | The device operates as normal. The operation mode is undefined. | B |
| PG | 14 | The device operates as normal, and there is a loss of indication on the PG pin. | B |
| VSET | 15 | The device operates as normal. The start-up voltage is undefined. | B |
| CONF | 16 | The device operates as normal. The switching frequency and output voltage are undefined. | B |
| COMP | 17 | The device operates as normal. The compensation setting is undefined. | B |
| VOS | 18 | The device goes out of regulation. The duty cycle is clamped at the maximum level. | B |
| GND | 19 | The device operates as normal. The alternative GND pins are still connected. | C |
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 |
|---|---|---|---|---|
| EN | 1 | 2 | The device operates as normal. The device is disabled. | B |
| AGND | 2 | 3 | The device does not power up and there is no output voltage. | B |
| VIN | 3 | 4 | The device operates as normal. | D |
| VIN | 4 | 5 | The device does not power up and there is no output voltage. | B |
| GND | 5 | 6 | The device is potentially damaged. | A |
| SW | 6 | 7 | The device operates as normal. | D |
| SW | 7 | 8 | The device operates as normal. | D |
| SW | 8 | 9 | The device operates as normal. | D |
| SW | 9 | 10 | The device is potentially damaged. | A |
| GND | 10 | 11 | The device does not power up and there is no output voltage. | B |
| VIN | 11 | 12 | The device operates as normal. | D |
| VIN | 12 | 13 | The device operates as normal and enters the PFM/PWM mode of operation. | B |
| MODE/SYNC | 13 | 14 | The device is potentially damaged. | A |
| PG | 14 | 15 | The device is potentially damaged. | A |
| VSET | 15 | 16 | The device does power up, but with the incorrect output voltage and switching frequency. | B |
| CONF | 16 | 17 | The device does power up, but with the incorrect output voltage and switching frequency. | B |
| COMP | 17 | 18 | The device is potentially damaged, or the device powers up with an incorrect compensation setting and the efficiency of the device degrades. | A |
| VOS | 18 | 19 | The device operates at the maximum duty cycle operation and the output voltage is unregulated. | B |
| GND | 19 | 1 | The device operates as normal. The device is disabled. | B |
Table 4-5 Pin FMA for Device Pins Short-Circuited to VIN
| Pin Name | Pin No. | Description of Potential Failure Effects | Failure Effect Class |
|---|---|---|---|
| EN | 1 | The device operates as normal. | D |
| AGND | 2 | The device does not power up and there is no output voltage. | B |
| VIN | 3 | The device operates as normal. | D |
| VIN | 4 | The device operates as normal. | D |
| GND | 5 | The device does not power up and there is no output voltage. | B |
| SW | 6 | The device is potentially damaged. | A |
| SW | 7 | The device is potentially damaged. | A |
| SW | 8 | The device is potentially damaged. | A |
| SW | 9 | The device is potentially damaged. | A |
| GND | 10 | The device does not power up and there is no output voltage. | B |
| VIN | 11 | The device operates as normal. | D |
| VIN | 12 | The device operates as normal. | D |
| MODE/SYNC | 13 | The device operates as normal and enters the PFM/PWM mode of operation. | B |
| PG | 14 | The device is potentially damaged. | A |
| VSET | 15 | The device operates as normal. The VSET pin defines the output voltage. | B |
| CONF | 16 | The device operates as normal. The CONF pin defines the switching frequency and output voltage. | B |
| COMP | 17 | The device operates as normal. The COMP pin defines the compensation setting. | B |
| VOS | 18 | The device is potentially damaged. | A |
| GND | 19 | The device does not power up and there is no output voltage. | B |