Hi Sir,
My customer met a output unstable issue as below:
CH1 is USB_PWR(5V)
CH2 is EN pin
They have 3 load on this path: Ethernet IC, USB HUB and Wifi IC.
GPIO of SoC (EN pin) could work normally if we cut off the connection.
The schematic as below:
It can work normally after remove the Ethernet IC as below:
The power-on peak current of Ethernet IC is about 300mA
They tried to remove all of three load and use facility to sink up to 3A. TPS2556 can work normally.
And changing a smaller value of ILIM resistor doesn't work for this issue.
Please help to give some comments.
Thank you.