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The RT9259 is a dual-channel DC/DC controller specifically designed to deliver high quality power where 12V power source is available. This part consists of a synchronous buck controller and an LDO controller. The synchronous buck controller integrates MOSFET drivers that support 12V+12V bootstrapped voltage for high efficiency power conversion. The bootstrap diode is built-in to simplify the circuit design and minimize external part count. The LDO controller drives an external N-MOSFET for lower power requirement.<br />Other features include adjustable operation frequency, internal soft start, under voltage protection, over current protection and shut down function. With the above functions, this part provides customers a compact, high efficiency, well-protected and cost-effective solution. This part comes to VQFN-16L 4x4, SOP14 and SSOP-16 packages.</p>
RT9259 Typical Circuit
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<div class="spec-list"><ul class="lv1"><li>Single 12V Bias Supply </li><li>Support Dual Channel Power Conversion♦ One Synchronous Rectified Buck PWM Controller♦ One Linear Controller </li><li>Both Controllers Drive Low Cost N-MOSFETs </li><li>Adjustable Frequency from 150kHz to 1MHz and Free-Run Frequency at 230kHz </li><li>Small External Component Count </li><li>Output Voltage Regulation♦ PWM Controller : ±1% Accuracy♦ LDO Controller : ±2% Accuracy </li><li>Two Internal V<sub>REF</sub> Power Support Lower to 0.8V </li><li>Adjustable External Compensation </li><li>Linear Controller Drives N-MOSFET Pass Transistor </li><li>Fully-Adjustable Outputs </li><li>Under Voltage Protection for Both Outputs </li><li>Over Current Fault Monitor on MOSFET; No Current Sense Resistor is Required. </li><li>RoHS Compliant and 100% Lead (Pb)-Free </li></ul></div>
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RT9259 Ordering Information
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<div class="spec-list"><ul class="lv1"><li>Graphic Card GPU, Memory Core Power </li><li>Graphic Card Interface Power </li><li>Motherboard, Desktop and Servers Chipset and MemoryCore Power </li><li>IA Equipments </li><li>Telecomm Equipments </li><li>High Power DC-DC Regulators </li></ul></div>
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