As the following circuit shows, VCC+5V_USB is the 4th power source, connecting the output of power management of diode.There are 3 5V input in the input port of LTC4417.
It’s normal when VCC+5V_USB prodive power with other circuit. However, if I cup VCC+5V_FIRST,VCC+5V_SECOND,VCC+5V_THIRD, 5V voltage will occurred in the VCC+5V_FIRST,VCC+5V_SECOND,VCC+5V_THIRD.
The LTC4417 PDF
Is this phenomance normal ?
Please kindly give me some advice ! Thanks.