®
RT3614EE
Multi-Phase PWM Controller for CPU Core Power Supply
General Description
The RT3614EE is a 4/3/2/1 multi-phase synchronous buck
controller designed to meet Intel IMVP9 compatible CPU
specification with a serial VID control interface. The
RT3614EE 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 RT3614EE features a new
generation of quick response mechanism (Adaptive Quick
Response, AQR) to optimize AVP performance during load
transient and reduce output capacitors. The RT3614EE
supports mode transition function with various operating
states. A serial VID (SVID) interface is built in the
RT3614EE to communicate with Intel IMVP9 compliant
CPU. The RT3614EE 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 RT3614EE 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 0V to 2.74V
with 10mV per step. The RT3614EE integrates a high
accuracy ADC for platform and function settings, such as
ICCMAX, switching frequency, over-current threshold and
AQR trigger level. The RT3614EE provides VR Ready and
thermal indicators. It also features complete fault
protection functions including over-voltage (OV), under-
voltage (UV), over-current (OC) and under-voltage lockout
(UVLO).
Features
Intel IMVP9 Serial VID Interface Compatible Power
Management States
4/3/2/1 Phase PWM Controller
G-NAVP
TM
(Green Native Adaptive Voltage
Positioning) Topology
0.5% DAC Accuracy
Differential Remote Voltage Sensing
Built-in ADC for Platform Programming and
Reporting
Accurate Current Balance
System Thermal Compensated AVP
Diode Emulation Mode at Light Load Condition
Fast Transient Response-Adaptive Quick Response
(AQR)
VR Ready Indicator
Thermal Monitoring and Indicator
Current Monitoring
IMVP9 System Input Power Monitoring
OVP, OCP, UVLO, UVP
Multi-Vendor Dr.MOS
Switching Frequency Range Setting
Slew Rate Setting
DVID Enhancement
Acoustic Noise Suppression
Small 32-Lead WQFN Package
Applications
IMVP9 Intel Core Supply
Notebook Computer Multi-Phase CPU Core Supply
AVP Step-Down Converter
Simplified Application Circuit
To PCH
RT3614EE
VR_READY
PWM1
VR_HOT#
To CPU
VCLK
VDIO
ALERT#
To Driver
DRVEN
PWM4
RT9610C
MOSFET
PWM2
PWM3
RT9610C
RT9610C
MOSFET
MOSFET
V
CORE
RT9610C
MOSFET
To PCH
RT3614EE
VR_READY
PWM1
VR_HOT#
PWM2
PWM3
PWM4
Dr.MOS
Dr.MOS
Dr.MOS
Dr.MOS
V
CORE
To CPU
VCLK
VDIO
ALERT#
To Dr.MOS
DRVEN
Copyright
©
2019 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS3614EE-01
December 2019
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
