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The RT8894 is a multi-phases PWM controller. Moreover, it is compliant with AMD SVI2 Voltage Regulator Specification to support both CPU core (VDD) and Northbridge portion (VDDNB) of the CPU. The RT8894 adopts the G-NAVPTM (Green-Native AVP), which is a Richtek's proprietary topology. The G-NAVP makes it an easy setting controller to meet all AMD AVP (Adaptive Voltage Positioning) requirements. The droop is easily programmed by setting the DC gain of the error amplifier. With proper compensation, the load transient response can achieve optimized AVP performance. The RT8894 uses SVI2 interface to control 8-bit DAC to set output voltage and operation mode, and support a dynamic platform master. An I<sup>2</sup>C interface is available for advanced power configuration and monitoring. The RT8894 also features programmable power states with different sets of operating phase number, over clocking offset, switching frequency, load-line and protection setting. The platform master can optimize the performance and efficiency of the power according to different working scenarios via the I<sup>2</sup>C interface. The RT8894 also provides power good indication, over-current indication and dual OCP mechanism for AMD SVI2 CPU core and NB. It also features complete fault protection functions including over voltage, under-voltage and negative-voltage protections.
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<div class="spec-list"><ul class="lv1"><li>Dual Outputs : <ul class="lv2"> <li></li><li>4/3/2/1-Phase for VDD </li><li>2/1/0-Phase for VDDNB </li></ul> </li><li>Integrated 3 MOSFET Drivers for VDD VR </li><li>Power Stage Input for VDD VR Voltage Range up to 20V </li><li>G-NAVP<sup>TM</sup> Topology </li><li>Support Dynamic Load-Line and Zero Load-Line </li><li>Diode Emulation Mode at Light Load Condition </li><li>SVI2 Interface to Comply with AMD Power Management Protocol </li><li>I<sup>2</sup>C Interface for Platform Configuration </li><li>Build-In ADC for V<sub>OUT</sub> and I<sub>OUT</sub> Reporting </li><li>Immediate OV, UV and NV Protections and UVLO </li><li>Programmable Dual OCP Mechanism </li><li>Accurate Current Balance </li><li>Fast Transient Response </li><li>Dynamic Phase Up/Down Control </li><li>Programmable Power State Control </li><li>Power Good Indicator for VDD VR </li><li>Thermal Monitor for VDD and VDDNB VRs </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>AMD SVI2 CPU </li><li>Desktop Computer </li></ul></div>
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