For the LP8556 application design I got 2 questions:
1.The minimum source current for the EN pin is 1mA and we got GPIO from CPU whose source capability is 3mA , can we just connect the EN pin to CPU GPIO directly ?
If not , we are going to pull up the pin the V3P3, do you have a recommend value for the pull-up resistor ? Or we just need to make sure the EN pin could draw more than 1mA from V3P3 ,for example , set the pull-up resistor to be 2.2kohm?
2. For the I2C pull-up design , can the SDA pin and SCL pin pull up connect to different power rail while the voltage of those power rail are all 3.3V?