We have LTM4680 uModules on our custom board. Firstly, we dont want any programming interface and arranged resistors according to what we want at the output to make it work standalone. Our problem is pgood signal is going low within an interval like 60ms after giving power. Also, when we debug ALERT output same as pgood signal, no problem for like 100ms but later going low.
What can be the problem? We didnt changed any component in the datasheet typical application. It is as same as typical.
vdd33 is outgoing successfully. We read it as 3.3 so no problem. Additionally, resistor connections for VOUT_CFG and VTRIM_CFG(no connection,leaved open) pins are connected as in the typical application (figure 45 in datasheet)