SLUSDQ4 April 2019 BQ79606A-Q1
The AVDD low dropout regulator (LDO) is the supply for the analog circuits in the BQ79606A-Q1. The supply for AVDD comes from LDOIN. AVDD contains an over-voltage comparator that signals a fault (RAIL_FAULT[AVDDOV]) when the voltage at AVDD rises above VAVDDOV. Additionally, AVDD contains an under-voltage circuit that sends the IC into Digital Reset when AVDD drops below VAVDDUV. Upon restarting, a fault is indicated (RAIL_FAULT[AVDDUV_DRST]) to inform the host why the IC failed. Additionally, AVDD is continuously monitored for abnormal oscillations that can result in undesired operation. If such an oscillation occurs, the SYS_FAULT2[AVDD_OSC] bit is set.