DLPS052 October 2015 DLPA3000
The buck converters as well as the supporting LDO_BUCK have a power good indication. Each buck converter has a separate indication.
The power good for the three buck converters indicate if their output voltage (PWR5,6,7_FB) is within a defined window. The relative power good ratio is 72%. This means that if the output voltage is below 72% of the set voltage the PG_fault bit is set high. The power good bits of the buck converters are in register 0x27 bit:
The LDO_BUCKS that supports the buck converters has its own power good indication. The power good of the LDO_BUCKS is asserted if the LDO voltage is below 80% (rising edge) or 60% (falling edge) of its intended value. The power good indication for the LDO_BUCKS is in register 0x29, V5V5_LDO_BUCK_PG_FAULT.