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Signal and Power Integrity–Simplified by Eric Bogatin

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Chapter 13. The Power Distribution Network (PDN)

The power distribution or delivery network (PDN) consists of all those interconnects from the voltage regulator module (VRM) to the pads on the chip and the metallization on the die that locally distribute power and return current. This includes the VRM itself, the bulk decoupling capacitors, the vias, the traces, the planes on the circuit board, the additional capacitors added to the board, the solder balls or leads of the packages, the interconnects in the packages mounted to the board, the wire bonds or C4 solder balls, and the interconnects on the chips themselves.

The primary difference between the PDN and signal paths is that there is just one net for each voltage rail in the PDN. It can ...

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