“This is a fast yet low-power controller with just four channels, capable of reaching relatively high speeds thanks to a bus capable of 3,600 MT/s. It slots a little awkwardly along the original Phison E26 drives, which are definitely not power-efficient but do have more horsepower and DRAM.
. . .
Similarly, we’ve seen the tradeoff between utilizing a PMIC – Phison provides its own – and having a discrete power management solution. Different problems, but the cost-benefit ratio exists for both.”- tomshardware.com
Source: tomshardware.com