Hi,
Abnormally switching is occurred on customer's board
I attach the switching waveform of the BUCK1 and the condition is following;
Board：Customer's board
Vin：5V
BUCK1：3.3V、200mA
BUCK2：1.8V、200mA
BUCK3：1.2V、700mA
Ta：Colder temperature@0~25℃(depend on the sample)
Occurring frequency：5sample/5sample → 100%
What is the cause of this behavior?
(I think that this behavior is not PFM mode.)
Please contact me(kuramochi@fujiele.co.jp) directly if you confirm the schematic.
And please let me know if you need more information.
Best Regards,
Kuramochi
