Hi team,
My customer is using TPS3809K33 and met an issue regarding to output oscillation.
I took it back set it up in TI lab as below:
The VDD of TPS3809 is connected to a external power supply. When I manually rotate and increase the input voltage and when the input voltage hit around 2.93V, tps3809 output unstable. The waveform is attached. However when I increase the input voltage in much faster slew rate, the output is normal. It almost like the device enters in a hystersis loop and never get out.. (yellow is the VDD pin, red is Reset pin)
I wonder what's the mechanism behind the behavior? Thanks.
Regards,
Patrick