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Z-Axis Power Delivery
Lateral vs. Z-Axis Power DeliveryTM (ZPDTM)
Today’s datacenters use a lateral power delivery system, in which the power voltage regulators are placed on the top side of the board around the processor. As the current demand of CPUs and GPUs increases, the distance between the voltage regulator and the point-of-load (PoL) becomes a significant factor for power delivery network (PDN) losses. In addition, increased PDN means that the system requires a large amount of output capacitance for the voltage regulators.
Z-Axis Power DeliveryTM is a method by which the voltage regulators are placed on the bottom side of the PCB below the processors. This results in a significant reduction (more than 10X) in PDN losses.
Lateral Power Delivery <1000A
Z-Axis Power DeliveryTM >1000A
MPS offers power module solutions with <4mm height to fit in the limited space on the bottom side of the PCB.
PDN Loss Is Reduced by 5X with ZPDTM
- Performance increases because there is less PDN voltage droop during transient
- Wattage loss decreases because of less I2R loss on the PCB
- Therefore, performance per watt increases
Adapting Power Solutions to the Increased Current Requirement of AI Processors
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