AMD-K6 Datasheet, PDF (280/346 Pages) Advanced Micro Devices – AMD-K6 Processor

AMD-K6^® Processor Data Sheet
Preliminary Information
20695H/0—March 1998
Measuring Case
Temperature
The case temperature must be measured on the top center of
the package where most of the heat is dissipated. Figure 94
shows the correct location for measuring the case temperature.
(If a heat exchange device is installed, the thermocouple must
contact the processor top surface through a drilled hole.) The
case temperature is measured to ensure that the thermal
solution meets the operational specification.
Thermocouple
Figure 94. Measuring Case Temperature
17.2
Layout and Airflow Considerations
Voltage Regulator
A voltage regulator is required to support the lower voltage
(3.3 V and lower) to the processor. In most applications, the
voltage regulator is designed with power transistors. As a
result, additional heatsinks are required to dissipate the heat
from the power transistors. Figure 95 shows the voltage
regulator placed parallel to the processor with the airflow
aligned with the devices. With this alignment, the heat
generated by the voltage regulator has minimal effect on the
processor.
262
Thermal Design
Chapter 17