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RT8120B PWM IC Regulator SOP-8

General Description

The RT8120 is a single-phase synchronous buck PWMDC/DC controller designed to drive two N-MOSFET. Itprovides a highly accurate, programmable output voltageprecisely regulated to low voltage requirements with aninternal 0.8V ±1% ( option for 0.6V ±1.5%) reference. TheRT8120 uses a single feedback loop voltage mode PWMcontrol for fast transient response. An oscillator with fixedfrequency 300kHz reduces the external inductor andcapacitor component size for saving PCB board area. TheRT8120 provides fast transient response to satisfy highcurrent output applications while minimizing externalcomponents. It is suitable for high performance graphicprocessors, DDR and VTT power. The RT8120 incorporatesan externally compensated error amplifier and an internalsoft-start and output enable. The RT8120 comes inSOP-8 and SOP-8 (Exposed Pad) packages.

Features

 

  •  Wide Input Voltage Range : 3V to 13.2V
  •  Embedded Switching Boot Diode
  • z0.8V ±1%, 0.6V ±1.5% Internal Reference
  • Shoot-Through Protection and Short Pulse FreeTechnology 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

Applications

  • System (Graphic, MB) with 5V or 12V Power
  • Graphic Cards (AGP 8X, 4X, PCI Express*16)
  • 3.3V to 12V Input DC/DC Regulators
  • Low Voltage Distributed Power Supplies



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