®
RT3663BH
Dual-Output PWM Controller with 3 Integrated Drivers for
AMD SVI2 Mobile CPU Power Supply
General Description
Features
3/2/1-Phase (VDD) + 2/1/0-Phase (VDDNB) PWM
The RT3663BH is a 3 + 2 phases PWM controller, and is
compliant withAMDSVI2 Voltage Regulator Specification
to support both CPU core (VDD) andNorthbridge portion
of the CPU (VDDNB). The RT3663BH features CCRCOT
(Constant Current Ripple Constant On-Time) withG-NAVP
(Green-Native AVP), which is Richtek's proprietary
topology. TheG-NAVP makes it an easy setting controller
to meet allAMDAVP (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
optimizedAVP 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
RT3663BH provides special purpose offset capabilities by
pin setting. The RT3663BH 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 over-
voltage, under-voltage and negative-voltage protections.
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
Applications
AMD SVI2 Mobile CPU
Laptop Computer
Simplified Application Circuit
RT3663BH
OCP_L
PHASE1
PHASE2
PWM3
MOSFET
V
V
VDD
MOSFET
RT9610
MOSFET
RT9610
SVC
To CPU
MOSFET
MOSFET
SVD
PHASEA1
PWMA2
VDDNB
SVT
Copyright 2019 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS3663BH-01 July 2019
www.richtek.com
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