Overview: NCP5392T 2/3/4-Phase Controller with Light Load Power Saving Enhancement for CPU Applications
The NCP5392T provides up to a four−phase buck solution which combines differential voltage sensing, differential phase current sensing, and adaptive voltage positioning to provide accurately regulated power for Intel processors. It also receives power saving command (PSI) from CPU, and operates in a single phase emulation diode mode to obtain a high efficiency at light load. Dual−edge pulse−width modulation (PWM) combined with precise inductor current sensing provides the fastest initial response to dynamic load events both in power saving and normal modes. Dual−edge multiphase modulation reduces the total bulk and ceramic output capacitance required therefore reducing the system cost to meet transient regulation specifications. A high performance operational error amplifier is provided to simplify compensation of the system. Dynamic Reference Injection further simplifies loop compensation by eliminating the need to compromise between closed−loop transient response and Dynamic VID performance. An enhancement of normal mode and PSI mode operation has been achieved in NCP5392T both under heavy load and light load condition or the load changing.
