SLUSDQ4 April 2019 BQ79606A-Q1
AVAO_REF (Analog Voltage Always On) is a fully internal rail that runs from the BAT input. It powers low current circuits that are required in all modes. AVAO_REF is continuously monitored for over and under voltage conditions. The overvoltage comparator signals a fault (SYS_FAULT1[AVAO_REF_OV]) when the voltage at AVAO_REF rises above VAVAO_REF_OV. Additionally, AVAO_REF contains an under-voltage circuit that puts the IC into POR mode if VAVAO_REF drops below VAVAO_REF_UV.