®
RT3602AC
Triple Channel PWM Controller with Integrated Driver
for IMVP8 Mobile CPU Core Power Supply
General Description
The RT3602AC is an IMVP8 compliant CPU power
controller which includes three voltage rails : a 2/1 phase
synchronous Buck controller, the MAIN VR, a single phase
synchronous Buck controller, the auxiliary VR, and a
single phase synchronous Buck controller, the VCCSA
VR. The RT3602AC 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 RT3602AC also features a quick
response mechanism for optimized AVP performance
during load transient. The RT3602AC supports mode
transition function with various operating states. A serial
VID (SVID) interface is built in the RT3602AC to
communicate with Intel IMVP8 compliant CPU. The
RT3602AC 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
RT3602AC 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 RT3602AC integrates a high
accuracy ADC for platform setting functions, such as quick
response trigger level. Besides, the setting function also
supposes this two rails address exchange. The RT3602AC
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 RT3602AC is available in the WQFN-
52L 6x6 small foot print package.
Features
Intel IMVP8 Serial VID Interface Compatible Power
Management States
2/1 Phase (MAIN VR) + Single Phase (Auxiliary VR)
+ Single Phase (VCCSA VR) PWM Controller
1 Embedded MOSFET Driver at the MAIN VR, 1
Embedded MOSFET Driver at the Auxiliary VR, and
Embedded MOSFET Driver at the VCCSA 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
Multiple or Single Phase Operation
Fast Transient Response
VR Ready Indicator
Thermal Throttling
Current Monitor Output
OVP, OCP, NVP, UVLO
Slew Rate Setting/Address Flip Function
DVID Enhancement
Applications
IMVP8 Intel Core Supply
Notebook/ Desktop Computer/ Servers Multi-Phase CPU
Core Supply
AVP Step-Down Converter
Simplified Application Circuit
RT3602AC
To PCH
VR_READY
VR_HOT
To CPU
VCLK
VDIO
ALERT
PHASE_MAIN
PWM_MAIN
Driver
MOSFET
MOSFET
PHASE_SA
MOSFET
V
SA
V
AXG
V
CORE
PHASE_AUXI
MOSFET
Copyright
©
2018 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS3602AC-02
June 2018
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
