® RT8845A Multi-Phase PWM Controller with PWM-VID Reference General Description The RT8845A is a 4/3/2/1 phase synchronous Buck PWM controller which is optimized for high performance graphic microprocessor and computer applications.
The RT8845A adopts G-NAVPTM (Green Native AVP) which is Richtek's proprietary topology derived from finite DC gain of EA amplifier with current mode control.
By utilizing the GNAVPTM topology, the operating frequency of the RT8845A 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 ...

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