GENERAL DESCRIPTION
Based on the GNAVPTM topology, the RT8888D also features a quick response mechanism for optimized AVP performance during load transient. A Serial VID (SVID) interface is built in the RT8888D to communicate with Intel VR12.5 compliant CPU. The RT8888D supports VID on-the-fly function with three different slew rates : Fast, Slow and Decay. By utilizing the G-NAVPTM topology, the operating frequency of the RT8888D 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 builtin high accuracy DAC converts the SVID code ranging from 0.5V to 3.04V with 10mV per step. The RT8888D integrates a high accuracy ADC for platform setting functions, such as no-load offset and over current protection level. The RT8888D provides VR ready output signals. It also features complete fault protection functions including over-voltage (OV), under-voltage (UV), negativevoltage (NV), over-current (OC) and under-voltage lockout (UVLO).
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