Intel Model Vehicle MPRTM0020 User Manual

26

The MPRTM0020 RTM needs several voltages that are not available from the SBC. The P30 
connection to the SBC only provides two power supplies:

•

+12 V voltage rail (420 mA maximum current) is used as the main input voltage for the RTM

•

+3.3 V SUS voltage powers the management circuitry on the RTM (ADM1026, I

2

C pullup, 

etc.)

Voltage regulation on the RTM is used to generate the additional required voltages, as shown in 

The four voltages that are generated on the RTM are used as follows:

•

+5V_SUS: The +5V_SUS is mainly used as an input voltage to drive the blue Hot Swap LED. 
It is generated from the +3.3V_SUS using a boost regulator. 

•

+5V: The 5 V payload voltage is generated from the +12 V power. To increase the power 
conversion efficiency, a switching regulator is added. The 5 V is mainly used for USB power 
and also used as a supply to 5 V/3.3 V linear regulator.

•

+3.3V: The 3.3 V voltage is used to drive the components on the SAS re-driver circuitry. This 
voltage is also used to drive the Gigabit Ethernet LINK/ACTIVITY LEDs on the RTM.

Health Red LED Control

9

USB_OC Monitor

12

Payload Power Enable

2

Payload PowerGood

43

12V

+3.3V_SU S

Input via P30 (from  

M PC BL0020)

12V/5V

C onverter

+5V

5V/3.3V

C onverter

3.3V/1.8V

C onverter

+1.8V

+3.3V

3.3V/5V

C onverter

+5V_SU S

For M anagem ent C ircuitry