The RT3613EE is a 3/2/1 multi-phase synchronous buck controller designed to meet Intel IMVP9 compatible CPU specification with a serial VID control interface. The RT3613EE adopts 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 G- NAVPTM topology, the RT3613EE features a new generation of quick response mechanism (Adaptive Quick Response, AQR) to optimize AVP performance during load transient and reduce output capacitors. The RT3613EE supports mode transition function with various operating states. A serial VID (SVID) interface is built in the RT3613EE to communicate with Intel IMVP9 compliant CPU. The RT3613EE 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 RT3613EE varies with VID, load and input voltage to further enhance the efficiency even in CCM. Moreover, the G-NAVPTM with CCRCOT (Constant Current Ripple COT) technology provides superior output voltage ripple over the entire input/output range. The built-in high accuracy DAC converts the SVID code ranging from 0V to 2.74V with 10mV per step. The RT3613EE integrates a high accuracy ADC for platform and function settings, such as ICCMAX, switching frequency, over-current threshold and AQR trigger level. The RT3613EE provides VR Ready and thermal indicators. It also features complete fault protection functions including over-voltage (OV), under-voltage (UV), over-current (OC) and under-voltage lockout (UVLO).
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