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On the NCP3170, is the PG (power good) open drain output pulled low when the power is good (really not power good) or is it active (pulling down) when the power is good.

When the feedback pin voltage rises between the reference voltages of comparator 1 and comparator 2 (0.726 < VFB < 0.862), then the output voltage is considered power good and the PG pin is released – high voltage level with a 100 k pull-up resistance.
Please refer to our NCP3170 PWM Switching Buck Regulator PG pin functionality is shown in Figures 34 through 36.

Answered by:
ON Semiconductor
2014-03-12 12:32:34.325