General Description
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.

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 VCOREController
Power Good Indication
Adjustable Over Current Protection
Over Voltage Protection
Small 48-Lead WQFN Package
RoHS Compliant and Halogen Free