®
RT3606BC
Dual Channel PWM Controller with Integrated Driver for IMVP8
CPU Core Power Supply
General Description
The RT3606BC is an IMVP8
compliant CPU power
controller which includes two voltage rails : a 3/2/1 phase
synchronous Buck controller, the CORE VR and a 2/1
phase synchronous Buck controller, the AXG VR. The
RT3606BC adopts G-NAVP
TM
(Green Native AVP) which
is Richtek's proprietary topology derived from finite DC
gain of EA amplifier with current mode control, making it
easy to set the droop to meet all Intel CPU requirements
of AVP (Adaptive Voltage Positioning). Based on the G-
NAVP
TM
topology, the RT3606BC also features a quick
response mechanism for optimized AVP performance
during load transient. The RT3606BC supports mode
transition function with various operating states. A serial
VID (SVID) interface is built in the RT3606BC to
communicate with Intel IMVP8 compliant CPU. The
RT3606BC supports VID on-the-fly function with three
different slew rates : Fast, Slow and Decay. By utilizing
the G-NAVP
TM
topology, the operating frequency of the
RT3606BC varies with VID, load and input voltage to further
enhance the efficiency even in CCM. Moreover, the G-
NAVP
TM
with CCRCOT (Constant Current Ripple COT)
technology provides superior output voltage ripple over
the entire input/output range. The built-in high accuracy
DAC converts the SVID code ranging from 0.25V to 1.52V
with 5mV per step. The RT3606BC integrates a high
accuracy ADC for platform setting functions, such as quick
response trigger level or over-current level. Besides, the
setting function also supports this two rails address
exchange. The RT3606BC provides VR ready output
signals. It also features complete fault protection functions
including over-voltage (OV), negative voltage (NV), over-
current (OC) and under-voltage lockout (UVLO). The
RT3606BC is available in the WQFN-60L 7x7 small foot
print package.
Features
Intel IMVP8 Serial VID Interface Compatible Power
Management States
3/2/1 Phase (CORE VR) + 2/1 Phase (AXG VR) PWM
Controller
2 Embedded MOSFET Drivers at the CORE VR, 1
Embedded MOSFET Driver at the AXG VR
G-NAVP
TM
(Green Native Adaptive Voltage
Positioning) Topology
0.5% DAC Accuracy
Differential Remote Voltage Sensing
Built-in ADC for Platform Programming
Accurate Current Balance
System Thermal Compensated AVP
Diode Emulation Mode at Light Load Condition for
Single Phase Operation
Fast Transient Response
VR Ready Indicator
Thermal Throttling
Current Monitor Output
OVP, OCP, NVP, UVLO
Slew Rate Setting/Address Flip Function
Rail Address Flexibility
DVID Enhancement
Applications
IMVP8 Intel Core Supply
Notebook/ Desktop Computer Multi-phase CPU Core
Supply
AVP Step-Down Converter
Simplified Application Circuit
To PCH
RT3606BC
PGOOD
PHASE1
VR_HOT
To CPU
VCLK
VDIO
ALERT
PHASE2
PWM3
PHASEA1
PWMA2
Driver
Driver
MOSFET
MOSFET
MOSFET
MOSFET
MOSFET
V
AXG
V
CORE
Copyright
©
2018 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS3606BC-07 August 2018
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
