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The RT8120J/K is a single-phase synchronous Buck PWM DC-DC controller designed to drive two N-MOSFET. It provides a highly accurate, adjustable output voltage precisely regulated to low voltage requirements with an internal 0.8V ±1% ( option for 0.6V ±1.5%) reference. The RT8120J/K uses a single feedback loop voltage mode PWM control for fast transient response. An oscillator with fixed frequency 300kHz reduces the external inductor and capacitor component size for saving space on PCB. The RT8120J/K provides fast transient response to satisfy high current output applications while minimizing external components. It is suitable for high performance graphic processors, DDR and VTT power. The RT8120J/K incorporates an externally compensated error amplifier and an internal soft-start and an output enable control function. The RT8120J/K is available in the SOP-8 and SOP-8 (Exposed Pad) packages.
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  • Wide Input Voltage Range : 3V to 13.2V
  • Embedded Switching Boot Diode
  • 0.8V ±1%, 0.6V ±1.5% Internal Reference
  • Shoot-Through Protection and Short Pulse Free Technology for Gate Drivers
  • Fixed Frequency 300kHz
  • Internal Soft-Start
  • Over Current Protection by Sensing MOSFET RDS(ON)
  • Enable/Shutdown Control
  • Drives Two N-MOSFETs
  • Full Duty Cycle : 0% to 85%
  • Fast Transient Response
  • Voltage Mode PWM Control with External Feedback Loop Compensation
  • Pinless LGATE Over Current Setting (LGOCS)
  • Under Voltage Protection
  • SOP-8 and SOP-8 (Exposed Pad) Packages
  • RoHS Compliant and Halogen Free
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System (Graphic, MB) with 5V or 12V Power<br />Graphic Cards (AGP 8X, 4X, PCI Express*16)<br />3.3V to 12V Input DC-DC Regulators<br />Low Voltage Distributed Power Supplies
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