Triple Channel PWM Controller for IMVP8 Mobile CPU Core Power Supply


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The RT3601BJ is an IMVP8 compliant CPU power controller which includes three voltage rails : a single 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 RT3601BJ 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 RT3601BJ also features a quick response mechanism for optimized AVP performance during load transient. The RT3601BJ supports mode transition function with various operating states. A serial VID (SVID) interface is built in the RT3601BJ to communicate with Intel IMVP8 compliant CPU. The RT3601BJ 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 RT3601BJ 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 0.25V to 1.52V with 5mV per step. The RT3601BJ integrates a high accuracy ADC for platform setting functions, such as quick response trigger level. Besides, the setting function also supposes this two rails address exchange. The RT3601BJ provides VR ready output signals. It also features complete fault protection functions including over-voltage (OV), negative voltage (NV), over-current (OC) and under-voltage lockout (UVLO). The RT3601BJ is available in the WQFN-48L 6x6 small foot print package.


  • IMVP8 Intel Core Supply
  • Notebook/ Desktop Computer/ Servers Multi-phase CPU Core Supply
  • AVP Step-Down Converter
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Triple Channel PWM Controller for IMVP8 Mobile CPU Core Power Supply2018/01/22
Technical Documents
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Richtek Vcore Product Selection List for Intel and AMD platforms [May, 2017]2018/11/15
Introduction to Richtek VCORE Solutions2017/10/18