Hi,
having some strange problems with a custom board design based on EVM one. Due to very little space available it was made in 2 pieces - power board (LP87524 + flash memory + CAN transceiver) and sensor board (IWR6843AoP + decoupling caps). The problem is - if I turn on only the power board, it consumes 200mA@5V, all the voltages are present and LP87524 is the only thing that heats up (checked with thermal camera, also disconnected everything else by removing the ferrite beads). Compared to the EVM, 1V0, 1V2 and 1V8 are a little bit noisier, but 3V3 is considerably worse, about 150mVpp ripple. If I connect the sensor board, no voltages are present at all, power consumption is almost zero.
Layout could have been better, but the board is only 15x15mm..
Also SOPs are pretty confusing on the EVM, I'm wondering if this would work as well?:
