Chapter 15

PolyPhase surface mount power supply meets AMD Athlon processor requirements with no heat sink

Craig Varga


The use of the LTC1929 PolyPhase current mode controller to meet AMD Athlon processor supply current requirements is described.




AMD Athlon processor


With the introduction of the AMD Athlon processor, the supply current requirement for a desktop PC’s processor has, for the first time, surpassed the 40A mark. This, combined with low operating voltage (1.6V nominal) and very tight transient-response requirements, pushes conventional power supply design approaches to their limits. The LTC1929 PolyPhase current mode controller makes a slight break with convention. Instead ...

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