The customer encountered start-up failure nearly 5% when there is a weak 1.4V in the output. (Which is leaked by the communication port TX.)
If there is no that weak 1.4V in the output, there is no any issues.
The customer have done AB/BA test. They found this issue follow the chip.
Yellow is the Output voltage.
Purple is the SW.
Green is the PG.
What is the potential reason for the 5% failure rate?
