RT8886A

® RT8886A 2-Phase Controller with Dual Integrated Drivers for VR12.5 and VR12.6 Mobile CPU Core Power Supply General Description The RT8886A is a two phase CPU power controller with dual integrated drivers for VR12.5 and VR12.6 compliant. The RT8886A adopts the G-NAVPTM (Green Native AVP) which is Richtek's proprietary topology derived from finite DC gain of EA amplifier with current mode control, making it easy to set the droop to meet all Intel CPU requirements of AVP (Adaptive Voltage Positioning). Based on the GNAVPTM topology, the RT8886A also features a quick response mechanism for optimized AVP performance during load transient. The RT8886A supports mode transition function with various operating states. A Serial VID (SVID) interface is built in the RT8886A to communicate with Intel VR12.5 and VR12.6 compliant CPU. The RT8886A supports VID on-the-fly function with different slew rates. By utilizing the G-NAVPTM topology, the operating frequency of the RT8886A varies with VID, load current and input voltage to further enhance the efficiency even in CCM. Besides the G-NAVPTM, the CCRCOT (Constant Current Ripple Constant On Time) technology provides superior output voltage ripple over the entire input/output range. The built-in high accuracy DAC converts the SVID code ranging from 0.5V to 3.04V with 10mV per step. The RT8886A integrates a high accuracy ADC for platform setting functions, such as noload offset and over-current protection level. The RT8886A provides VR re...