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The RT2776 is a VR12/IMVP7 compliant CPU power controller which includes two channels : a 3/2/1 phase with 3 integrated drivers synchronous Buck controller for the CORE VR, and a single phase Buck controller for the AXG VR. The RT2776 adopts G-NAVP<sup>TM</sup> (Green Native Adaptive Voltage Positioning), which is Richtek's proprietary topology derived from a finite DC gain compensator with current mode control, making it an easy setting PWM controller, meeting all Intel CPU requirements of AVP. Based on the G-NAVP<sup>TM</sup> topology, the RT2776 also features a quick response mechanism for optimizing AVP performance during load transient. The RT2776 supports mode transition function with various operating states. A serial VID (SVID) interface is built in the RT2776 to communicate with Intel VR12/IMVP7 compliant CPU. The RT2776 supports VID on-the-fly function with three different slew rates : Fast, Slow and Decay. By utilizing the G-NAVP<sup>TM</sup> topology, the operating frequency of the RT2776 varies with VID, load and input voltage to further enhance the efficiency even in CCM. The built-in high accuracy DAC converts the SVID code ranging from 0.25V to 1.52V with 5mV per step. The RT2776 integrates a high accuracy ADC for platform setting functions, such as no-load offset or over current level.
RT2776 Typical Circuit
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<div class="spec-list"><ul class="lv1"><li>VR12/IMVP7 Compatible Power Management </li><li>3/2/1 Phase for CORE VR and Single Phase for AXG VR </li><li>3 Embedded MOSFET Drivers at the CORE VR </li><li>G-NAVP<sup>TM</sup> Topology </li><li>Serial VID Interface </li><li>0.5% DAC Accuracy </li><li>Differential Remote Voltage Sensing </li><li>Built-in ADC for Platform Programming </li><li>Accurate Current Balance </li><li>System Thermal Compensated AVP </li><li>Diode Emulation Mode at Light Load Condition for Single Phase </li><li>Fast Transient Response </li><li>1.1V<sub>INITIAL</sub> / 0.0V<sub>INITIAL</sub> for both Rails at Startup </li><li>Power Ready Indicator </li><li>Thermal Throttling </li><li>Current Monitor Output </li><li>OVP, UVP, OCP, OTP, UVLO </li><li>External No-load Offset Setting for both Rails </li><li>DVID Enhancement </li><li>56-Lead WQFN Package </li><li>RoHS Compliant and Halogen Free </li></ul></div>
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<div class="spec-list"><ul class="lv1"><li>VR12/IMVP7 Intel Core Supply </li><li>Notebook/ Desktop Computer/ Servers Multi-phase CPU Core Supply </li><li>AVP Step-Down Converter </li></ul></div>
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