ZHCSQT5 July 2022 TPS7A57
PRODUCTION DATA
When operating with IN between 1.07 V and 1.1 V with the internal charge pump on, a glitch can occur on the output during the shutdown power-supply sequence if the BIAS rail falls prior to the IN rail.
When the BIAS rail falls below the VUVLO_BIAS threshold, the output is disabled. When the IN rail is above the minimum UVLO threshold to operate, the LDO restarts. Figure 8-3 shows this behavior.
To prevent this behavior, ensure the proper turn-off power-supply sequence is followed, or select an operating mode (such as charge pump disabled).