A voltage regulator has a plurality of predetermined configurations and comprises a measurement circuit to measure an electrical characteristic of at least one external impedance and to determine a digital value corresponding to the measured electrical characteristic. An address generator converts the digital value to a first digital address corresponding to a memory location having contents. Each of the contents corresponds to a respective one of the predetermined configurations. A controller configures the voltage regulator based on the contents of the memory location corresponding to the first digital address.

 
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