JAJSCH6C June 2016 – June 2021 TPS62135
PRODUCTION DATA
The TPS62135x has a built in power good (PG) function to indicate whether the output voltage has reached its target. The PG signal can be used for startup sequencing of multiple rails. The PG pin is an open-drain output that requires a pull-up resistor to any voltage up to a voltage level of the input voltage at VIN. It can sink 2 mA of current and maintain its specified logic low level. PG is low when the device is turned off due to EN, UVLO or thermal shutdown, so it can be used to actively discharge Vout. VIN must remain present for the PG pin to stay low.
In case VSEL is used to change the output voltage during operation, PG is not blanked for a change from low output voltage to high output voltage. It therefore will indicate "power bad" if the voltage step is large enough to trigger the power good comparator.
If the power good output is not used, it is recommended to tie to GND or leave open.