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The RT8862 is an advanced 4/3/2/1-phase synchronous buck controller with 2 integrated MOSFET drivers for Intel VR11/VR10 and AMD K8/K8_M2 CPUs power application. RT8862 adopts state-of-the-art dynamic phase control capability. That achieves high efficiency over wide load range. It uses differential inductor DCR current sense to achieve phase current balance and active voltage positioning. Other features include adjustable operating frequency, adjustable soft start, power good indication, external error-amp compensation, over voltage protection, over current protection and enable/shutdown for various application. RT8862 comes to a small footprint with WQFN-48L 7x7 package.

Applications

  • Desktop CPU Core Power
  • Low Voltage, High Current DC/ DC Converter
Key Spec.
RT8862
Status EOL
VID Table Support K8;K8_M2;VR10.x;VR11.1
Number of Phases 4
Vcc (typ) (V) 12
Vin (min) (V) 10.8
Vin (max) (V) 13.2
Accuracy (Vout>=1V) (+/- %) 0.5
Freq (typ) (kHz) 300
Built-in DAC Generator Yes
Number of MOSFET Drivers 2
Features Adjustable Frequency;DCR Current Sense;Droop Control;Enable Input;OCP;OVP;Power Good;SCP;Voltage Mode Control
Package Type WQFN7x7-48
Features
  • Support Dynamic Phase Control
  • 12V Power Supply Voltage
  • 4/3/2/1-Phase Power Conversion
  • 2 Embedded MOSFET Drivers
  • Internal Regulated 5V Output
  • VID table for INTEL VR11.1/VR10.x and AMD K8/K8_M2 CPUs
  • Continuous Differential Inductor DCR Current Sense
  • Adjustable Soft Start
  • Adjustable Frequency (300kHz typ.)
  • Power Good Indication
  • Adjustable Over Current Protection
  • Over Voltage Protection
  • VRHOT Sensing with External Thermistor
  • IMON Output Current Indication
  • Power State Indicator (PSI)
  • Small 48-Lead WQFN Package
  • RoHS Compliant and Halogen Free
Datasheet
TitleLast UpdateDownload
Advanced 4/3/2/1-Phase PWM Controller with Embedded Drivers for CPU Core Power Supply2015/05/19
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