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The RT3605BT is an IMVP8 compliant CPU power controller which includes three voltage rails : a 3/2/1 phase synchronous Buck controller, the MAIN VR, a 2/1 phase synchronous Buck controller, the Auxiliary VR, and a single phase synchronous Buck controller, the VCCSA VR. The RT3605BT 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 RT3605BT also features a quick response mechanism for optimized AVP performance during load transient. The RT3605BT supports mode transition function with various operating states. A serial VID (SVID) interface is built in to communicate with Intel IMVP8 compliant CPU. The RT3605BT 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 RT3605BT 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 0.25V to 1.52V with 5mV per step. The RT3605BT integrates a high accuracy ADC for platform setting functions, such as quick response trigger level. The RT3605BT provides VR ready output signals. It also features complete fault protection functions including over-voltage (OV), over-current (OC) and under-voltage lockout (UVLO). The RT3605BT is available in the WQFN-52L 6x6 small foot print package.

RT3605BT Typical Circuit

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RT3605BT Ordering Information

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