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Article: Designing high-current, VRM-compliant CPU power supplies.(Technology Information)
- Article from:
- EDN
- Article date:
- October 26, 2000
- Author:
CopyrightCOPYRIGHT 2000 Reed Business Information, Inc. (US). This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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THE PRACTICAL DESIGN OF EMBEDDED, HIGH-CURRENT, VRM9.0-COMPLIANT POWER SUPPLIES REQUIRES EXPERTISE IN MANY DISCIPLINES OF ENGINEERING AND A THOROUGH, METHODICAL DESIGN PROCEDURE.
MODERN HIGH-SPEED MICROPROCESSORS require fast delivery of enormous supply currents in microsecond time frames, tight supply-voltage tolerance, and intelligent voltage programming. The latest CPU voltage-regulator specifications from Intel and AMD call for load-current slew rates of 50 to 200A/[micro]sec and peak currents of 60 to more than 120A. These demands are transforming the design of portable power supplies to levels almost like those of utility power.
The core supply ...