This is a urgent project.
We have modified the evaluation board of MP2276 to create a negative power supply.
Vin = 3.8V
Vout = -3.3V
Iout = 1A (max)
fsw = 1MHz
Switching is stable when the output current is 0.35A or less.
When the output current becomes 0.35A or more, switching is performed twice or more, and the fluctuation of the output voltage becomes large.
What is the cause of this phenomenon?
Is there a way to solve it?