RT3662EB
Single Channel PWM Controller with 2 Integrated Drivers for
AMD SVI2 GPU CORE Power Supply
General Description
Features
2/1-Phase (VDDC) PWM Controller
The RT3662EB is a single channel PWM controller with
2 integrated drivers, and it is compliant with AMD SVI2
Voltage Regulator Specification to support GPU power
(VDDC). The RT3662EB features CCRCOT (Constant
Current Ripple Constant On-Time) with G-NAVP
(Green-Native AVP), which is Richtek's proprietary
topology. G-NAVP makes it an easy setting controller
to meet all AMD AVP (Adaptive Voltage Positioning)
VDDC 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 VDDC domains. The RT3662EB can operate in
diode emulation mode to enhance the light load
efficiency. And it provides the current gain adjustment
capability by pin setting. The RT3662EB provides
power good indication, thermal indication (VRHOT_L),
and it features complete fault protection functions
including, over current, over voltage and under voltage.
2 Embedded MOSFET Drivers
TM
G-NAVP 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
Adjustable Current Gain Capability
DVID Enhancement
0.5% DAC Accuracy
Differential Remote Voltage Sensing
Build-in ADC for Pin Setting Programming,
Thermal Indication and V
Fast Transient Response
Power Good Indicator
, I
Reporting
OUT OUT
Thermal Indicator (VRHOT_L)
OVP, UVP and UVLO
Over Current Protection
Applications
AMD SVI2 GPU Core Power
Laptop Computer
Marking Information
3B= : Product Code
YMDNN : Date Code
3B=YM
DNN
Simplified Application Circuit
RT3662EB
VRHOT_L
PHASE1
MOSFET
MOSFET
V
VDDC
SVC
To GPU
SVD
PHASE2
SVT
Copyright © 2019 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS3662EB-04 August 2019
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
