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The RT8809 is a dual-phase synchronous buck PWM controller with integrated drivers which are optimized for high performance graphic microprocessor and computer applications. The IC integrates a G-NAVP<sup>TM</sup> PWM controller, two 12V MOSFET drivers with internal bootstrap diodes, as well as output current monitoring and protection functions into the WQFN-24L 4x4 package. The RT8809 adopts DCR and R<sub>DS(ON)</sub> current sensing. Load line voltage positioning (droop) and over current protection are accomplished through continuous inductor DCR current sensing, while R<sub>DS(ON)</sub> current sensing is used for accurate channel current balance. Using both methods of current sampling utilizes the best advantages of each technique. The RT8809 also features a one-bit VID control operation in which the feedback voltage is regulated and tracks external input reference voltage. Other features include, adjustable operating frequency, external compensation, and enable/shutdown functions.</div>
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<div class="spec-list"><ul class="lv1"><li>Dual-Phase PWM Controller </li><li>Two Embedded MOSFET Drivers and Embedded Switching Boot Diode </li><li>Green-NAVP<sup>TM </sup>(Green Native Adaptive Voltage Positioning) Topology </li><li>Dynamic Auto Phase Control with Programmable Threshold </li><li>Cross-talk Jitter Suspend (CJS<sup>TM</sup>) </li><li>Remote GND Detection for High Accuracy </li><li>Automatic Diode Emulation Mode/Or Ultrasonic Mode at Light Load </li><li>Lossless R<sub>DS(ON)</sub> Current Sensing for Current Balance </li><li>Lossless DCR Current Sensing for AVP & OCP </li><li>Reference Voltage Output with 1% Accuracy </li><li>External Reference Input with Soft-Start (RISS) </li><li>Embedded One-Bit VID Control </li><li>Programmable OCP Threshold </li><li>Programmable Switching Frequency </li><li>Reference Tracking UVP/OVP Protection </li><li>Shoot Through Protection and Short Pulse Free Technology </li><li>RoHS Compliant and Halogen Free </li></ul></div>
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<div class="spec-list"><ul class="lv1"><li>Middle to High End GPU Core Power </li><li>High End Desktop PC Memory Core Power </li><li>Low Voltage<font size="4">,</font> High Current DC/DC Converter </li><li>Voltage Regulator Modules </li></ul></div>
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