1
DATASHEET
To request the full datasheet, please visit www.intersil.com/products/isl6367
Green Hybrid Digital Dual 6+1 Phase PWM Controller for
VR12/IMVP7 Applications With SMBus/PMBus/I
2
C and AUTO Phase
ISL6367
The ISL6367 is a Hybrid Digital dual PWM controller and is
designed to be compliant to Intel VR12/IMVP7
specifications. Its 6-phase PWMs control the microprocessor
core or memory voltage regulator, while its single-phase
PWM controls the peripheral voltage regulator for graphics,
system agent, or processor I/O. It includes programmable
functions and telemetries for easy use, high system flexibility
and overclocking applications using SMBus, PMBus, or I
2
C
(Modified) interface, which is designed to be conflict free with
CPU’s SVID bus. This hybrid digital approach eliminates the
need of NVM and Firmware often seen in a full digital
solution and significantly reduces design complexity,
inventory and manufacture cost.
The ISL6367 utilizes Intersil’s proprietary Enhanced Active Pulse
Positioning (EAPP) modulation scheme to achieve the extremely
fast transient response with fewer output capacitors. The
ISL6367 accurately monitors the load current via the IMON pin
and reports this information via the IOUT register to the
microprocessor, which sends a PSI# signal to the controller at
low power mode via SVID bus. The controller enters 1- or
2-phase operation in low power mode (PSI1); in the ultra low
power mode (PSI2,3), it operates in single phase with diode
emulation option. In low power modes, the magnetic core and
switching losses are significantly reduced, yielding high
efficiency at light load. After the PSI# signal is de-asserted, the
dropped phase(s) are added back to sustain heavy load
transient response and efficiency. In addition, the ISL6367
features auto-phase shedding to optimize the efficiency from
light to full load for Green Environment without sacrificing the
transient performance.
Today’s microprocessors require a tightly regulated output voltage
position versus load current (droop). The ISL6367 senses the
output current continuously by measuring the voltage across a
dedicated current sense resistor or the DCR of the output
inductor. The sensed current flows out of the FB pin to develop the
precision voltage drop across the feedback resistor for droop
control. Current sensing circuits also provide the needed signals
for channel-current balancing, average overcurrent protection and
individual phase current limiting. The TM and TMS pins sense an
NTC thermistor’s temperature, which is internally digitized for
thermal monitoring and for integrated thermal compensation of
the current sense elements of the respective regulator.
The ISL6367 can sense input current to provide a true
Catastrophic Failure Protection (CFP) output. It also features
remote voltage sensing and completely eliminates any potential
difference between remote and local grounds. This improves
regulation and protection accuracy. The threshold-sensitive
enable input is available to accurately coordinate the start-up of
the ISL6367 with other voltage rails.
Features
• Intel VR12/IMVP7 Compliant
- SerialVID with Programmable IMAX, TMAX, BOOT,
ADDRESS OFFSET Registers
• Intersil’s Proprietary Green Hybrid Digital Enhanced Active
Pulse Positioning (EAPP) Modulation Scheme (Patented)
- SMBus/PMBus/I
2
C Interface with SVID Conflict Free
- NVM and Firmware Free for Low Cost and Easy Use
- Auto Phase Shedding Option for Green Environment with
Boot-refresh Function Option
- Variable Frequency Control During Load Transients to
Reduce Beat Frequency Oscillation
- Linear Control with Evenly Distributed PWM Pulses for
Better Phase Current Balance During Load Transients
- Voltage Feed-forward and Ramp Adjustable Options
- High Frequency and PSI Compensation Options
- Proprietary Active Phase Adding and Dropping with Diode
Emulation Scheme For Enhanced Light Load Efficiency
•Dual Outputs
- Output 1 (VR0): 1 to 6-Phase for Core or Memory (Coupled
Inductor and Phase Doubler, ISL6617/11A Compatible)
- Output 2 (VR1): Single Phase for Graphics, System Agent,
or Processor I/O
- Differential Remote Voltage Sensing
- ±0.5% Closed-loop System Accuracy Over Load, Line and
Temperature
• Programmable 1 or 2-Phase Operation in PSI1 Mode
• Programmable Slew Rate of Fast Dynamic VID with
Dynamic VID Compensation (DVC) for VR0
• Dynamic VID Compensation (DVC) for VR1 at No Droop
• Droop and Diode Emulation Options
• Programmable Standard or Coupled-Inductor Operation
• Precision Resistor
or DCR Differential Current Sensing
- Integrated Programmable Current Sense Resistors
- Accurate Load-Line (Droop) Programming
- Accurate Current Monitoring and Current Balancing
• True Input Current Sensing For Catastrophic Failure Protection
• Average Overcurrent Protection and Channel Current Limit
With Internal Current Comparators
• Precision Overcurrent Protection on IMON & IMONS Pins
• Independent Oscillators, up to 2MHz Per Phase, for Cost,
Efficiency, and Performance Optimization
• Dual Thermal Monitoring and Integrated Compensation
• Start-up Into Pre-Charged Load
• Pb-Free (RoHS Compliant)
April 5, 2012
FN7884.0
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
|Copyright Intersil Americas Inc. 2012. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
