The TPS62085, TPS62086, and TPS62087 have a power good output. The power good goes high impedance once the output is above 95% of the nominal voltage, and is driven low once the output voltage falls below typically 90% of the nominal voltage. The PG pin is an open-drain output and is specified to sink up to 1 mA. The power good output requires a pullup resistor connecting to any voltage rail less than 6 V. The PG signal can be used for sequencing of multiple rails by connecting it to the EN pin of other converters. Leave the PG pin unconnected when not used. Table 8-1 shows the PG pin logic.
|DEVICE CONDITIONS||LOGIC STATUS|
|Enable||EN = High, VFB ≥ VPG||√|
|EN = High, VFB < VPG||√|
|Shutdown||EN = Low||√|
|Thermal Shutdown||TJ > TJSD||√|
|UVLO||0.5 V < VIN < VUVLO||√|
|Power Supply Removal||VIN ≤ 0.5 V||√|