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The RT8807B is a two phases synchronous Buck PWM controller with integrated drivers which is optimized for high-performance graphic microprocessor and computer applications. The IC integrates a voltage mode PWM controller, two 5V MOSFET drivers with internal bootstrap diodes, as well as output current monitoring and protection functions into the WQFN-24L 4x4 package.<br />The inductor currents are sensed by lossless DCR current sensing technique for current balance and over current protection. The RT8807B also features a reference tracking mode operation in which the feedback voltage is regulated and tracks external input reference voltage. Other features include output current indication, adjustable operating frequency, adjustable soft-start, power good, external compensation, and enable/shutdown functions.
RT8807B Typical Circuit
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<div class="spec-list"><ul class="lv1"><li>Two-Phase Power Conversion with Single 12V Power Supply </li><li>Embedded 5V Upper Gate Driver and 12V Lower Gate Driver </li><li>Internal Regulated 5V Output </li><li>Precise Core Voltage Regulation </li><li>Selectable Internal / External Reference </li><li>Differential Inductor DCR Current Sense </li><li>External Programmable Voltage Droop Control </li><li>Enable Control for External Shutdown </li><li>Adjustable Operating Frequency </li><li>Adjustable Soft Start </li><li>Power Good and Output Current Indication </li><li>Adjustable Over Current Protection </li><li>Under Voltage Protection </li><li>Over Temperature Protection </li><li>RoHS Compliant and Halogen Free </li></ul></div>
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RT8807B Ordering Information
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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, High Current DC / DC Converter </li><li>Voltage Regulator Modules </li></ul></div>
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