ASRock Z87 Extreme4 Motherboard
Voltage Regulator
Contents
The CPU voltage regulator circuit of the ASRock Z87 Extreme4 has 12 phases for the CPU. The voltage regulator is controlled by an ISL6379 chip, which uses a digital design. Each phase is driven by one “K03J5” MOSFET and one “K03J4” MOSFET (we weren’t able to decode these part numbers).
Figure 9: Voltage regulator circuit
The ASRock Z87 Extreme4 uses solid capacitors and ferrite-core coils. If you want to learn more about the voltage regulator circuit, please read our tutorial on the subject.