Hi，follow picture is about my design of TPS74801。
yesterday,I want to test whether the load of PCIE_VCCA2P5 can withstand 2.5+-10%,so i set the LDO do not work by tie the PIN5 EN to GND。
After i complete the test,recover the connect style of PIN5 EN to enable the TPS74801 to work。
I power on，the output of TPS74801 is 4.2V not 2.5V.The voltage of the PIN8 FB is 0V.
I DON'T know what the problem is.