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AMD SVI2 CPU
AMD SVI2 CPU
Desktop Computer
4/3/2/1-Phase (VDD) + 2/1/0-Phase (VDDNB) PWM Controller
4/3/2/1-Phase (VDD) + 2/1/0-Phase (VDDNB) PWM Controller
G-NAVPTM Topology
Support Dynamic Load-Line and Zero Load-Line
Diode Emulation Mode at Light Load Condition
SVI2 Interface to Comply AMD Power Management Protocol
Build-In ADC for VOUT and IOUT Reporting
Immediate OV
UV and NV Protections and UVLO
Programmable Dual OCP Mechanism
0.5% DAC Accuracy
Fast Transient Response
Power Good Indicator
Over-Current Indicator
52-Lead WQFN Package
Dual-Output PWM Controller for AMD SVI2 CPU Power Supply
The RT3667BY is a 4 + 2 phases PWM controller, and is compliant with AMD SVI2 ,Voltage Regulator Specification to support both CPU core (VDD) and Northbridge ,portion of the CPU (VDDNB). The RT3667BY features CCRCOT (Constant Current ,Ripple Constant On-Time) with the,G-NAVP (Green-Native AVP), which is Richtek's proprietary topology. The G-NAVP ,makes it an easy setting controller to meet all AMD AVP (Active Voltage ,Positioning) VDD/VDDNB requirements. The droop is easily programmed by setting ,the DC gain of the error amplifier. With proper compensation, the load ,transient response can achieve optimized AVP performance. The controller also ,uses the interface to issue VOTF Complete and to send digitally encoded voltage ,and current values for the VDD and VDDNB domains. It can operate in single ,phase and diode emulation mode and reach up to 90% efficiency in different ,modes according to different loading conditions. The RT3667BY provides special ,purpose offset capabilities by pin setting. The RT3667BY also provides power ,good indication, over-current indication (OCP_L) and dual OCP mechanism for AMD ,SVI2 CPU core and NB. It also features fault protection functions, including ,over-voltage, under voltage and negative voltage protections.
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