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The RT9259A 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.
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 SOP-14 package.
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  • Single 12V Bias Supply
  • Support Dual Channel Power Conversion
      ♦ One Synchronous Rectified Buck PWM Controller
      ♦ One Linear Controller
  • Both Controllers Drive Low Cost N-Channel MOSFETs
  • Adjustable Frequency from 150kHz to 1MHz and Free-Run Frequency at 230kHz
  • Small External Component Count
  • Output Voltage Regulation
      ♦ PWM Controller : ±1% Accuracy
      ♦ LDO Controller : ±2% Accuracy
  • Two Internal VREF Power Support Lower to 0.8V
  • Adjustable External Compensation
  • Linear Controller Drives N-Channel MOSFET Pass Transistor
  • Fully-Adjustable Outputs
  • Under Voltage Protection for Both Outputs
  • Adjustable Over Current Protection
  • RoHS Compliant and 100% Lead (Pb)-Free
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Graphic Card GPU, Memory Core Power<br />Graphic Card Interface Power<br />Motherboard, Desktop and Servers Chipset and Memory Core Power<br />IA Equipments<br />Telecomm Equipments<br />High Power DC-DC Regulators
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