Dear Team,
one of our customers recently discovered a problem with the TPS54418. Some boards are showing a higher ripple of 300mV on the output. (edit: The issues are seen at start-up and/or when using a cooling spray. So when having cold temperature conditions).
Further investigations and a x-ray showed that the GND pad was having a poor connection (~50%).
In the data sheet I saw that the pad is in the function of being a thermal pad only, see page 12 / section 8.2:
May I ask you to comment if the PowerPad also has an influence on the part's control loop?
Thanks and best regards
Martin