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The RT8120G/H is a single-phase synchronous buck PWM DC-DC controller designed to drive two N-MOSFET. It provides a highly accurate, programmable output voltage precisely regulated to low voltage requirements with an internal 0.8V ±1% ( option for 0.6V ±1.5%) reference. The RT8120G/H 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 PCB board area. The RT8120G/H 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 RT8120G/H incorporates an externally compensated error amplifier and an internal soft-start and output enable. The RT8120G/H comes in SOP-8 and SOP-8 (Exposed Pad) packages.
RT8120G/RT8120H Typical Circuit
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<div class="spec-list"><ul class="lv1"><li>Wide Input Voltage Range : 3V to 13.2V </li><li>Embedded Switching Boot Diode </li><li>0.8V ±1%, 0.6V ±1.5% Internal Reference </li><li>Shoot-Through Protection and Short Pulse Free Technology for Gate Drivers </li><li>Fixed Frequency 300kHz </li><li>Internal Soft-Start </li><li>Over Current Protection by Sensing MOSFET R<sub>DS(ON)</sub> </li><li>Enable/Shutdown Control </li><li>Drives Two N-MOSFETs </li><li>Full Duty Cycle : 0% to 85% </li><li>Fast Transient Response </li><li>Voltage Mode PWM Control with External Feedback Loop Compensation </li><li>Pinless LGATE Over Current Setting (LGOCS) </li><li>Under Voltage Protection </li><li>SOP-8 and SOP-8 (Exposed Pad) Packages </li><li>RoHS Compliant and Halogen Free </li></ul></div>
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RT8120G/RT8120H Ordering Information
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<div class="spec-list"><ul class="lv1"><li>System (Graphic, MB) with 5V or 12V Power </li><li>Graphic Cards (AGP 8X, 4X, PCI Express*16) </li><li>3.3V to 12V Input DC-DC Regulators </li><li>Low Voltage Distributed Power Supplies </li></ul></div>
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