General Description
The RT3663BM is a 3 + 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 RT3663BM features CCRCOT
(Constant Current Ripple Constant On-Time) with 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 (Adaptive 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
RT3663BM provides special purpose offset capabilities
by pin setting. The RT3663BM also provides power good
indication, over-current indication (OCP_L) and dual OCP
mechanism for AMD SVI2 CPU core and NB. It also
features complete fault protection functions including overvoltage,
under-voltage and negative-voltage protections.

Applications
 AMD SVI2 Mobile CPU
 Laptop Computer
Features
 3/2/1-Phase (VDD) + 2/1/0-Phase (VDDNB) PWM
Controller
 3 Embedded MOSFET Drivers
 G-NAVPTM Topology
 Support Dynamic Load-Line and Zero Load-Line
 Diode Emulation Mode at Light Load Condition
 SVI2 Interface to Comply with AMD Power
Management Protocol
 Built-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