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The RT8692 is a 2/1 phase synchronous Buck PWM controller optimized for high performance graphic microprocessor. The IC integrates a Constant-On-Time (COT) PWM controller, two MOSFET drivers with internal bootstrap diodes, as well as channel current balance and protection functions including overvoltage protection (OVP), undervoltage protection (UVP), current limit, and thermal shutdown into the WQFN-20L 3x3 package.<br /><br />The RT8692 adopts R<sub>DS(ON)</sub> current sensing technique. Current limit is accomplished through continuous inductor current sensing, while R<sub>DS(ON)</sub> current sensing is used for accurate channel current balance. Using the method of current sampling utilizes the best advantages of each technique.<br /><br />The RT8692 features external reference input control, of which the feedback voltage is regulated and tracks external input reference voltage. Other features include adjustable switching frequency, dynamic phase number control, internal soft-start, power good indicator, and enable functions.
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<div class="spec-list"><ul class="lv1"><li>Dual-Phase PWM Controller </li><li>V<sub>OUT</sub> Operating Range: 0.3V to 2V </li><li>1% High Accuracy 2V Reference </li><li>Differential Remote Voltage Sensing </li><li>Power State Indicator <ul class="lv2"> <li></li><li>1P-CCM/2P-CCM/1P-DEM/2P-DEM </li></ul> </li><li>Two Embedded MOSFET Drivers and Embedded Switching Boot Diode </li><li>External Reference Input Control </li><li>Dynamic Phase Number Control </li><li>Lossless R<sub>DS(ON)</sub> Current Sensing for Current Balance </li><li>Internal/External Soft-Start </li><li>Adjustable Current-Limit Threshold </li><li>Adjustable Switching Frequency </li><li>UVP/OVP Protection </li><li>Shoot Through Protection and Short Pulse Free Technology </li><li>Thermal Shutdown </li><li>Power Good Indicator (EN to PG high = 500μs) </li></ul></div>
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<div class="spec-list"><ul class="lv1"><li>Desktop PC Memory, VTT Power </li><li>Chipset/RAM Power Supply </li><li>Generic DC-DC Power Regulator </li></ul></div>
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