loading
About Richtek | Contact Us |

The RT8868A is a 4/3/2/1-phase synchronous buck controller with two integrated MOSFET drivers for CPU power application and a single-phase buck with integrated MOSFET driver for North-Bridge (NB) chipset. The RT8868A uses differential inductor DCR current sense to achieve phase current balance and active voltage positioning. Other features include adjustable operating frequency, power good indication, external error-amp compensation, over voltage protection, over current protection and enable/shutdown for various applications. The RT8868A comes in a small footprint with WQFN-48L 7x7 package.

Applications

  • Desktop CPU Core Power
  • Low Voltage, High Current DC-DC Converter
Key Spec.
RT8868A
Status EOL
VID Table Support AM2;AM2+
Number of Phases 1;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 1;2
Features Adjustable Frequency;DCR Current Sense;Enable Input;OCP;OVP;Power Good;SCP;Voltage Mode Control
Package Type WQFN7x7-48
Features
  • 12V Power Supply Voltage
  • 4/3/2/1-Phase Power Conversion for VCORE Power
  • 3 Embedded MOSFET Drivers (2 for CPU and 1 for NB)
  • Internal Regulated 5V Output
  • Support AMD AM2 6-bit Parallel and AM2+ 7-bit Serial VID Tables
  • Support 3.4MHz High Speed I2C
  • Continuous Differential Inductor DCR Current Sense
  • Adjustable Frequency (Typically at 300kHz)
  • Selectable 1 or 2 Phase in Power-Saving (PS) Mode
  • Phase-Interleaving for VCORE Controller
  • Power Good Indication
  • Adjustable Over Current Protection
  • Over Voltage Protection
  • Small 48-Lead WQFN Package
  • RoHS Compliant and Halogen Free
Datasheet
TitleLast UpdateDownload
4/3/2/1-Phase PWM Controller for AMD AM2/AM2+/AM3 CPUs2015/05/19
Please confirm with our distributor or sales representative for actual stock status.
TOP