The device has an overcurrent protection circuit that limits the current drawn out of the MICBIAS output to the maximum supported level when an external undesired short event occurs on the MICBIAS pin. The device sets the status flag, P0_R44_D4 bit, on an overcurrent detection. Additionally, the device has an overtemperature detection circuit that is enabled by default and sets the status flag, P0_R44_D5 bit, whenever the die junction temperature goes higher than the supported level.
Additionally, the P0_R58 and P0_R40_D4:3 register can be configured to shutdown MICBIAS along with the on-chip boost on an overtemperature detection. TI recommends configuring PD_ON_FLT_CFG, P0_R40_D4-3 to "10" so that on an overtemperature detection, the device powers-down MICBIAS, the on-chip boost, and all ADC channels.
More details and information on fault diagnostics are discussed in the PCM6xx0-Q1 Fault Diagnostics Features application report.