I have some questions about ADP2139 from the customer.ADP2139 has an internal soft start function. Although the inrush current is the value within the datasheet,the customer would like to reduce it more.If possible, let me know the solution that reduces inrush current more.
Thank you for your reply. I see what you say.
I will talk with the customer more.
One possible solution is to make sure you don't have too much capacitance at the output. A larger cap requires a larger charging current during start-up. But note though, that you need the output cap to limit the output voltage ripple. The plots in the datasheet are generally taken with just enough value of capacitance, so I don't think you'll be able to significantly reduce those values some more.