Power good is an open-drain output driven by a window comparator. PG is held low when the device is disabled, in undervoltage lockout, and in thermal shutdown. When the output voltage is in regulation hence, within the window defined in the electrical characteristics, the output is high impedance.
|EN||DEVICE STATUS||PG STATE|
|X||VIN < 2 V||undefined|
|low||VIN ≥ 2 V||low|
|high||2 V ≤ VIN ≤ UVLO OR in thermal shutdown OR VOUT not in regulation||low|
|high||VOUT in regulation||high impedance|