Hi
I am using 3 powers for my board,the powers are 3.7v, 3.3v & 5v . The 3.7v rail is used in many places , so I made whole power plane as 3.7v, but I have doubt weather we need to make power plane for 3.3v &5v in the power plane or any some other options.
I am using 6layer board stack up is
L1- signal
L2-gnd
L3-signal
L4-power
L5-gnd
L6-signal
Please guide me to make my board efficient and guide me in step by step instructions
I sort of doubt whether anyone will want to provide great detail. But to start out:
Can you estimate the total amount of current demand for each voltage rail?
Have you figured out how you will produce these 3 voltage rails?
Do you have an approximate idea of how many different locations use each voltage rail?
How would anyone be able to give some decent advice for a 6 layer board from this very minimal description?
And why a 6 layer board in the first place?
What sort of experience do you have with PCB design? Your question sort of suggest you do not have much experience in this area, and a (good) 6-layer board is not really beginner stuff.
Not to mention the cost which is about 10 times of the cost of a 2-layer board.
3.7V is an odd voltage, it’s almost like an intermediate voltage for other point of loads.
If this is the case, there is an argument to have this as a tick winding track, on the power plane, to the PoL and each PoL has a large shape dedicated to that rail
It might be worth re-evaluating your stackup.
A solid gnd plane is always beneficial the rest is down to how we you place you parts, grouping by rail and then by function
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