I am using a fixed default output part (TPS62421) to generate 1.8V and 1.2V rails for a system.
I am seeing higher voltages (1.93V and 1.27V, respectively). As load increases, the voltage rises with 1.93V/1.27V being the maximum voltage I see.
I'm looking for any suggestions as to what might be causing this and recommended fixes. One thought is the decoupling capacitors on the microcontroller and FPGA may be affecting the feedback loop.
Notes:
- V_SYS ranges from 3V to 5V
- Total system power: 1.4W
Please see below for schematic.
Thank you,
Juwan
