SLVSAA4G June 2010 – February 2018 TPS65251
The PGOOD pin is an open-drain output. The PGOOD pin is pulled low when any buck converter is pulled below 85% of the nominal output voltage. The PGOOD is pulled up when all three buck converters’ outputs are more than 90% of its nominal output voltage and reset time of 1 second elapses. The polarity of the PGOOD is active high.