Hi,
I am designing a solution for a customer based on the LM5175. the design specs are 10-28 VIN _ 19.5VOUT / 3.5A
i have two issues:
1. i am getting relatively pure efficiency (85%) and i have excessive current draw (150mA) at no load and switching noise. i have attached the schematics Although i could find any problems with it
2. is there any issue using the same mosfet for all 4 switches? i am using PSMN1R4-40YLDX from NXP. 40V 100A 1.4mOHM 1.7V gate threshold
Thanks