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26 Intel NetStructure
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MPCBL0001 High Performance Single Board Computer
Technical Product Specification
Features Overview
The VRM controller is designed to support multiple processor core voltages selected by the voltage
identification (VID) pins on the processor. Logic provided on the SBC ensures that the VRM is not
enabled if the two processors request different VID codes. In addition, the VRM is disabled until
all other voltage converters indicate “power good.” The voltage regulator module is designed to
support up to two 43 W (TDP - Thermal Design Power) processors.
Note: The +5 VSB power rail only needs to supply at least 4.0 V to properly power any circuitry that uses
the +5 VSB rail when the payload power (i.e., processors, ethernet controller, etc.) is not turned on.
Any alerts from the +5 VSB sensor when the system is not in the M4, M5, or M6 states should be
ignored.
2.2.7.6 IPMB Standby Power
This converter provides DC isolation between the -48 V and -48 V return connections and all of the
derived DC power on the MPCBL0001. Its output is connected to the IPMB and standby +5 V
power rail of the SBC. The converter supplies a maximum of 1.5 A of +5 V current. A +3.3 V
management voltage is derived from the IPMB power by means of a linear regulator circuit and is
used to power most of the IPMC functions. Standby power is derived from the -48 V rails and is
always available on the SBC unless the overall system power rail (-48 V) is shut down.