Lower operating voltages and higher currents are making power supply margining an increasingly critical part of product development. A complete assessment of the power supply performance must include both the voltage and current delivery to the load. Measuring the voltage at the load is not too difficult. Unfortunately, current measurement at the load is not possible because of the distributed nature of the current connecting to a multipin load. However, utilizing the flexibility of a benchtop power supply with cable compensation, a simulated network impedance, and measured dynamic voltage at the load it is possible to more accurately validate the dynamic current.
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