ZHCSB85F November 2011 – October 2021 TPS62140 , TPS62140A , TPS62141 , TPS62142 , TPS62143
PRODUCTION DATA
The TPS6214x has a built-in power-good (PG) function to indicate whether the output voltage has reached its appropriate level or not. The PG signal can be used for start-up sequencing of multiple rails. The PG pin is an open-drain output that requires a pullup resistor (to any voltage below 7 V). It can sink 2 mA of current and maintain its specified logic-low level. With the TPS62140, it is high-impedance when the device is turned off due to EN, UVLO, or thermal shutdown. The TPS62140A features PG = Low in this case and can be used to actively discharge VOUT (see Figure 9-41). VIN must remain present for the PG pin to stay Low. See TPS62130A Differences to TPS62130 Application Report for application details. If not used, the PG pin should be connected to GND but may be left floating.
| DEVICE STATE | PG LOGIC STATUS | ||
|---|---|---|---|
| HIGH IMPEDANCE | LOW | ||
| Enable (EN = High) | VFB ≥ VTH_PG | √ | |
| VFB ≤ VTH_PG | √ | ||
| Shutdown (EN = Low) | √ | ||
| UVLO | 0.7 V < VIN < VUVLO | √ | |
| Thermal Shutdown | TJ > TSD | √ | |
| Power Supply Removal | VIN < 0.7 V | √ | |
| DEVICE STATE | PG LOGIC STATUS | ||
|---|---|---|---|
| HIGH IMPEDANCE | LOW | ||
| Enable (EN = High) | VFB ≥ VTH_PG | √ | |
| VFB ≤ VTH_PG | √ | ||
| Shutdown (EN = Low) | √ | ||
| UVLO | 0.7 V < VIN < VUVLO | √ | |
| Thermal Shutdown | TJ > TSD | √ | |
| Power Supply Removal | VIN < 0.7 V | √ | |