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