SFFS110 June 2021 TPS1663
4.2 HTSSOP Package
Figure 4-3 shows the TPS1663 pin diagram for the HTSSOP package. For a detailed description of the device pins please refer to the Pin Configuration and Functions section in the TPS1663 data sheet.
Figure 4-3 Pin Diagram (HTSSOP Package)Table 4-6 Pin FMA for Device Pins
Short-Circuited to Ground
| Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
|---|---|---|---|
| IN | 1, 2, 3 | Device unpowered. Device not functional. | B |
| NC | 4, 5, 17 | No effect. Normal operation. | D |
| P_IN | 6 | Device unpowered. Device not functional. | B |
| UVLO | 7 | UVLO protetion is triggered. Device turns off the internal FET. | B |
| OVP | 8 | Over-voltage protection will not function. | B |
| GND | 9 | No effect. Normal operation. | D |
| dVdT | 10 | Device doesn’t power up. | B |
| ILIM | 11 | Device doesn’t power up. | B |
| MODE | 12 | Device provides auto-retry behavior for over-current events as per device functional modes in data sheet. | D |
| SHDN | 13 | Device is disabled. | B |
| IMON | 14 | Current monitor function is not available. | B |
| FLT | 15 | Fault function not available. | B |
| PGOOD | 16 | PGOOD function not available. | B |
| OUT | 18, 19, 20 | Device will enter into current limiting operation. | B |
Table 4-7 Pin FMA for Device Pins
Open-Circuited
| Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
|---|---|---|---|
| IN | 1, 2, 3 | Device unpowered. Device not functional. | B |
| NC | 4, 5, 17 | No effect. Normal operation. | D |
| P_IN | 6 | Device unpowered. Device not functional. | B |
| UVLO | 7 | Device functionality undetermined. Device may turn off / power down. | B |
| OVP | 8 | Over-voltage protection function is not determined. Device may turn off the internal FET. | B |
| GND | 9 | Device unpowered. Device not functional. | B |
| dVdT | 10 | Device provides slew rate 24 V/500 μs on output at power up. | D |
| ILIM | 11 | Internal FET is turned off. Output is not powered up. | B |
| MODE | 12 | Device provides latch-off behavior for over-current events as per device functional modes in data sheet. | D |
| SHDN | 13 | No effect. Normal operation. | D |
| IMON | 14 | No effect. Normal operation. | D |
| FLT | 15 | No effect. Normal operation. | D |
| PGOOD | 16 | No effect. Normal operation. | D |
| OUT | 18, 19, 20 | No power or current provided to load. | D |
Table 4-8 Pin FMA for Device Pins
Short-Circuited to Adjacent Pin
| Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
|---|---|---|---|
| IN | 1, 2, 3 | IN to NC: no effect. Normal operation. | D |
| NC | 4, 15, 17 | NC to P_IN: no effect. Normal operation. | D |
| P_IN | 6 | P_IN to UVLO: under-voltage protection will not function. | B |
| UVLO | 7 | UVLO to OVP: potential device damage if UVLO voltage is more than 5.5 V. | B |
| OVP | 8 | OVP to GND: over-voltage protection will not function. | B |
| GND | 9 | GND to dVdT: device unpowered. Device not functional. | B |
| dVdT | 10 | dVdT to ILIM: device can go into current limit operation. | B |
| ILIM | 11 | ILIM to MODE: device can go into current limit operation or Latch-off mode. | B |
| MODE | 12 | MODE to SHDN: device can go into shutdown. | B |
| SHDN | 13 | SHDN to IMON: device can go into shutdown. | B |
| IMON | 14 | IMON to FLT: potential Device damage if FLT pin voltage is more than 5.5 V. | A |
| FLT | 15 | PGOOD to FLT: oring of PGOOD and FLT signals. | D |
| PGOOD | 16 | PGOOD to OUT: potential device damage when PGOOD is low and output is powered up. | A |
| OUT | 18, 19, 20 | OUT to N.C: no effect. Normal operation. | D |
Table 4-9 Pin FMA for Device Pins Short-Circuited to IN
or
P_IN
| Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
|---|---|---|---|
| IN | 1,2 | No effect. Normal operation. | D |
| NC | 3, 4, 17 | No effect. Normal operation. | D |
| P_IN | 6 | No effect. Normal operation. | D |
| UVLO | 7 | Under-voltage protection will not function. | B |
| OVP | 8 | Potential device damage if supply voltage is more than 5.5 V | D |
| GND | 9 | Short circuit of input supply. | B |
| dVdT | 10 | Potential device damage if supply voltage is more than 5.5 V. | A |
| ILIM | 11 | Potential device damage if supply voltage is more than 5.5 V. | A |
| MODE | 12 | Potential device damage if supply voltage is more than 5.5 V. | A |
| SHDN | 13 | Potential device damage if supply voltage is more than 5.5 V. | A |
| IMON | 14 | Potential device damage if supply voltage is more than 5.5 V. | A |
| FLT | 15 | Potential device damage if FLT pin is low. | A |
| PGOOD | 16 | Potential device damage if PGOOD pin is low. | A |
| OUT | 18, 19, 20 | Device will not limit power or current into load. | B |