Advantech SOM-Express Design Guide
96 Chapter 6 Power Delivery Guidelines
6.2.2 AT Power Delivery Block Diagram
An AT power source will provide 12 V and 5 V power. An additional switching
regulator or LDO will be required to simulate the ATX power (3.3 V…) .There will be
no standby voltage when an AT power source is used.
Figure 6-2 AT Power Delivery Block Diagram
