HI TI,
We are using TPS54326PWPR in our telemetry application. This IC is used to convert 16V into 5.5V. Schematic is attached for your reference.
The problem we are having is,
1.) If we connect 16V into Lab power supply and switches on power supply then DC-DC converter is not giving 5.5 V output voltage.
2.) If we power on supply first and then if we connect 16V into power supply then it works fine
3.) We have checked with different power supply from different makes but the issue remains the same
4.) This issue remains the same with or without load
5.) I have tried with 0.01uF soft-start capacitor( 3.8ms soft-start time) but the issue remains the same
6.) If we make soft-start capacitor to 0.1uF ( 38ms soft-start time), then everything works fine. But our requirement is to have less than 5ms soft-start time.
Please let us know if we making any mistake and help us in overcoming this issue.