SLVAEL1A November 2020 – January 2021 TPS7B82-Q1
4.1 DGN Package
Figure 4-1 shows the TPS7B82-Q1 pin diagram for the DGN package. For a detailed description of the device pins please refer to the Pin Configuration and Functions section in the TPS7B82-Q1 data sheet.
Figure 4-1 Pin Diagram (DGN) Package, Top View:Table 4-2 Pin FMA for Device Pins
Short-Circuited to Ground
| Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
|---|---|---|---|
| IN | 1 | No power supplied to device resulting in no output voltage. | B |
| EN | 2 | Device stuck in shutdown mode resulting in no output voltage. | B |
| NC | 3 | No effect. Normal Operation. | D |
| GND | 4 | No effect. Normal Operation. | D |
| GND | 5 | No effect. Normal Operation. | D |
| GND | 6 | No effect. Normal Operation. | D |
| NC | 7 | No effect. Normal Operation. | D |
| VOUT | 8 | Device not operational with output being pulled to GND. Current limit is triggered, and device may repeat entering and exiting thermal shutdown depending on power dissipation. | B |
Table 4-3 Pin FMA for Device Pins
Open-Circuited
| Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
|---|---|---|---|
| IN | 1 | No power supplied to device resulting in no output voltage. | B |
| EN | 2 | Device will flip between shutdown mode and normal mode due to noise on EN voltage. Could result in no output voltage. | B |
| NC | 3 | No effect. Normal Operation. | D |
| GND | 4 | Floating GND pin could result in incorrect voltage regulation or no output voltage. | B |
| GND | 5 | Floating GND pin could result in incorrect voltage regulation or no output voltage. | B |
| GND | 6 | Floating GND pin could result in incorrect voltage regulation or no output voltage. | B |
| NC | 7 | No effect. Normal Operation. | D |
| VOUT | 8 | Output disconnected from the load. | 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 Effect(s) | Failure Effect Class |
|---|---|---|---|---|---|
| IN | 1 | EN | 2 | EN pulled to IN supply. No shutdown mode possible. Device will be powered on as long as input supply is present. | D |
| EN | 2 | NC | 3 | No effect. Normal Operation. | D |
| NC | 3 | GND | 4 | No effect. Normal Operation. | D |
| GND | 5 | GND | 6 | No effect. Normal Operation. | D |
| GND | 6 | NC | 7 | No effect. Normal Operation. | D |
| NC | 7 | VOUT | 8 | No effect. Normal Operation. | D |
Table 4-5 Pin FMA for Device Pins Short-Circuited to
VBAT
| Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
|---|---|---|---|
| IN | 1 | No effect. Normal Operation. | D |
| EN | 2 | EN pulled to VBAT. No shutdown mode possible. Device will be powered on as long as VBAT is present. | C |
| NC | 3 | No effect. Normal Operation. | D |
| GND | 4 | VBAT may be discharged if other GND connections on device are still tied to GND. If all pins are floated to VBAT this could result in VOUT seeing VBAT voltage. | B |
| GND | 5 | VBAT may be discharged if other GND connections on device are still tied to GND. If all pins are floated to VBAT this could result in VOUT seeing VBAT voltage. | B |
| GND | 6 | VBAT may be discharged if other GND connections on device are still tied to GND. If all pins are floated to VBAT this could result in VOUT seeing VBAT voltage. | B |
| NC | 7 | No effect. Normal Operation. | D |
| VOUT | 8 | VOUT pin could be damaged and load being powered by TPS7B82-Q1 will see VBAT voltage. | A |