Patent ID: 7132764

Claim:
A power supply system, comprising: a controller configured to cause a regulator to produce a principle supply voltage and a secondary supply voltage, said regulator for coupling to a power source and to a microelectronics device to supply said principal supply voltage and said secondary supply voltage to said microelectronics device, wherein said controller is further configured to maintain said principal supply voltage within a tolerance level bounded at a principal supply upper limit by a first reliability voltage value and bounded at a principal supply lower limit by a second reliability voltage value, and to maintain said secondary supply voltage within a second tolerance level bounded at a secondary supply upper limit by the first reliability voltage value and bounded at a secondary supply lower limit by a third reliability voltage value, said principal supply voltage and said secondary supply voltage determined in accordance with a gain factor by a voltage-current loadline, said first reliability voltage is determined by multiplying one plus a tolerance level by a first input voltage required value and the second tolerance level for the secondary supply voltage has a large first percentage of tolerance for the secondary supply upper limit and a significantly smaller second percentage of tolerance for the secondary supply limit.