3PHASEPWM
Overview of Intel VRM 9.0 Design Guidelines With today’s microprocessor voltage below 2V, they cannot be powered directly out of the conventional silver box that typically provides 5V and 12V. Located in proximity to the CPU, the voltage regulator module (VRM) delivers regulated, stepped down voltage to the CPU. The Intel VRM 9.0 definition is specifically intended to meet the needs of systems based on the Intel ® Xeon™ and Pentium ® 4 processors. Table 1 provides a summary of the output requirements for VRM 9.0.
Table 1
- Summary of the VRM 9.0 output requirements (Source: Intel VRM9.0 DC-DC converter design guidelines.
Other requirements include VID voltage identification and Power Good feedback. The VRM must accept five lines to set the nominal maximum voltage. Five processor package pins will have a high-low pattern corresponding to the voltage required by the individual processor. The VRM should provide an open collector
Power Good signal consistent with TTL DC levels....
