Chapter 19

High efficiency power sources for Pentium processors

Craig Varga


The use of the LTC1148-based circuit as a high efficiency power source for Pentium processors is described.



Pentium processor

Switching regulator

In many applications, particularly portable computers, the efficiency of power conversion is critical both from the standpoint of battery life and thermal management. Desktop machines may also benefit from higher efficiency, particularly a “green PC.” While linear regulators can offer low cost and high performance solutions, they can only offer 67% efficiency in 5V to 3.3V applications. Switching regulators are more efficient and minimize or even eliminate the need for heat sinks at a higher ...

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