Damn Lies, and Schematics

That reduces the ground bounce caused by the internal bond wires of the IC, but getting the entire converter to work properly requires a deep understanding of the role played by the PCB, its contribution to ground bounce, noise, and so on. 

Note that a typical circuit schematic makes no indication or mention of even the existence of this very useful and necessary ground plane. Further, very rarely do 1C designers have a precise model of the PCB built into their magnihcent simulators—which may explain how they manage to prove almost any hypothesis they may be favoring on a particular day  

The question we pose here is, what happens if the load is far away from the converter Note that far away need not just be in terms of an absolute physical distance. For example, that description could well apply to a typical clamshell cell phone (flip type), where the converter is located on one half and its load on the other, with very narrow traces mnning 

In the first case we have the ideal situation, with no intervening trace resistances considered. So since the reference voltage is 1.25V, we have chosen IkQ and 3kQ resistors to get an output of 5V. Note that the classical equation of a divider is 

The divider takes the voltage difference across its lower resistor (usually Vref) and leverages it by the factor i xoTAL/ LowER (where / total is the sum of the two resistances), to give us the voltage across the entire divider (usually the output voltage). 

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