ECS A75F-A Motherboard

Voltage Regulator

The CPU voltage regulator circuit of the ECS A75F-A has three phases for the CPU main voltage (VDD a.k.a. Vcore) and one for the CPU VDDNB voltage (integrated memory controller). We couldn’t figure out how the CPU VDDP voltage (integrated video controller) is generated, and probably doesn’t have a separate voltage regulator. Therefore, this motherboard uses a “3+1” configuration.

Figure 7: Voltage regulator circuit

Figure 8: Voltage regulator circuit

This motherboard uses solid ferrite-core coils, which present less energy loss than iron-core coils (i.e., they improve efficiency), solid capacitors, and low RDS(on) transistors (i.e., higher efficiency).

If you want to learn more about the voltage regulator circuit, please read our tutorial on the subject.