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TPS65381-Q1: SDN6 / Endrv issues - Capacitor solution

Part Number: TPS65381-Q1

Hi Team,

We have recently been having issues with the TPS65381. We found that SDN6 keep dropping out which ultimately prevents the Endrv output from turning on. We have been troubleshooting the issue for a few weeks and found that the only fix to guarantee that we do not dropout out is removing the Loop Stabilization Capacitor from Vdd5.
I am just wondering if we have encountered these issues with the  TPS65381 and why the capacitor removal helps circumvent this issue.

  • Hello RJ,

    Can you send a schematic which shows the ENDRV, VDD5, VDD6 and SDN6 pins? Also please point out which can is the loop stabilization capacitor in said schematic? I will also need to take a look at some scope plots of VDD6, SDN6, VDD5 and ENDRV before/after removing the capacitor. Thank you.