ZHCSNX8B December 2020 – September 2023 TPS6593-Q1
PRODUCTION DATA
The comparator module in TPS6593-Q1, which monitors the voltage on the VCCA pins, controls the power state machine of the device. VCCA voltage detection outputs determine the power states of the device as follows:
A separate voltage comparator monitors whether or not the VCCA voltage is within the expected PGOOD range when VCCA is expected to be 5-V or 3.3-V. This voltage comparator checks at device power-up whether the voltage on the VCCA supply pin is above the VCCA_UV threshold. Refer to Section 8.3.3 for additional detail on the operation of the PGOOD monitor function.
LDOVINT, which is the internal supply to the digital core of the device, may attempt to restart the device when the input voltage at VCCA pin falls or stays between VCCA_UVLO and VCCA_UV voltage levels; the voltage at the VCCA pin, however, must be above the VCCA_UV voltage level for the device to power up properly.
Figure 8-1 shows a block diagram of the VCCA input voltage monitoring.