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The RT3612EG is a 2/1 phase synchronous buck controller designed to meet Intel IMVP9 compatible CPU specification with a serial VID control interface. The RT3612EG adopts G-NAVP^TM (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- NAVP^TM topology, the RT3612EG features a new generation of quick response mechanism (Adaptive Quick Response, AQR) to optimize AVP performance during load transient and reduce output capacitors. The RT3612EG supports mode transition function with various operating states. A serial VID (SVID) interface is built in the RT3612EG to communicate with Intel IMVP9 compliant CPU. The RT3612EG supports VID on-the-fly function with three different slew rates: Fast, Slow and Decay. By utilizing the G-NAVP^TM topology, the operating frequency of the RT3612EG varies with VID, load and input voltage to further enhance the efficiency even in CCM. Moreover, the G-NAVP^TM 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 RT3612EG integrates a high accuracy ADC for platform and function settings, such as ICCMAX, switching frequency, over-current threshold and AQR trigger level. The RT3612EG 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).

RT3612EG Typical Circuit

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RT3612EG Ordering Information

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