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®
Data Sheet
March 30, 2007
ISL6314
FN6455.0
Single-Phase Buck PWM Controller with
Integrated MOSFET Drivers for Intel VR11
and AMD Applications
The ISL6314 single-phase PWM control IC provides a
precision voltage regulation system for advanced
microprocessors. This controller IC maintains the same
features as the multi-phase product family, but reduces the
output to a single-phase, for lower current systems. By
reducing the number of external parts, this integration is
optimized for a cost and space saving power management
solution.
One outstanding feature of this controller IC is its multi-
processor compatibility, allowing it to work with both Intel and
AMD microprocessors. Included are programmable VID
codes for Intel VR11 as well as AMD 5-bit and 6-bit DAC
tables. A circuit is provided for remote voltage sensing,
compensating for any potential difference between remote
and local grounds. The output voltage can also be positively
or negatively offset through the use of a single external
resistor.
Another unique feature of the ISL6314 is the addition of a
circuit that allows optimizing compensation to be added for
flatter load transient response and well controlled dynamic
VID response.
The ISL6314 also includes advanced control loop features
for optimal transient response to load apply and removal.
One of these features is highly accurate, fully differential,
continuous DCR current sensing for load line programming.
Active Pulse Positioning (APP) and Adaptive Phase
Alignment (APA) are two other unique features, allowing for
quicker initial response to high di/dt load transients; the
number of output bulk capacitors can be reduced, helping to
reduce cost.
Protection features of this controller IC include a set of
sophisticated overvoltage, undervoltage, and overcurrent
protection. Furthermore, the ISL6314 includes protection
against an open circuit on the remote sensing inputs.
Combined, these features provide advanced protection for the
microprocessor and power system.
Features
• Integrated-driver Single-Phase Power Conversion
• Precision Core Voltage Regulation
- Differential Remote Voltage Sensing
- ±0.5% System Accuracy Over-Temperature
- Adjustable Reference-Voltage Offset
• Optimal Transient Response
- Adaptive Phase Alignment (APA)
- Active Pulse Positioning (APP) Modulation
• Fully Differential, Continuous DCR Current Sensing
- Accurate Load Line Programming
• Variable Gate Drive Bias: 5V to 12V
• Multi-Processor Compatible
- Intel VR11 Mode of Operation
- AMD Mode of Operation
• Microprocessor Voltage Identification Inputs
- 8-Bit DAC
- Selectable between Intel VR11, AMD 5-bit, and AMD
6-bit DAC tables
- Dynamic VID Technology
• Overcurrent Protection
• Multi-tiered Overvoltage Protection
• Digital Soft-Start
• Selectable Operation Frequency up to 1.0MHz
• Pb-free plus anneal available (RoHS compliant)
Ordering Information
PART
NUMBER*
(Note)
PART
MARKING
TEMP.
RANGE
(°C)
PACKAGE
(Pb-free)
PKG.
DWG. #
ISL6314CRZ ISL6314 CRZ 0 to +70 32 Ld 5x5 QFN L32.5x5B
ISL6314IRZ ISL6314 IRZ -40 to +85 32 Ld 5x5 QFN L32.5x5B
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100% matte
tin plate termination finish, which are RoHS compliant and compatible
with both SnPb and Pb-free soldering operations. Intersil Pb-free
products are MSL classified at Pb-free peak reflow temperatures that
meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
*Add “-T” suffix for tape and reel.
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

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Pinout
ISL6314
ISL6314
(32 LD QFN)
TOP VIEW
32 31 30 29 28 27 26 25
PGOOD 1
24 PHASE
SS 2
23 UGATE
FS 3
22 BOOT
REF 4
OFS 5
33
GND
21 LGATE
20 NC(TBD)
APA 6
19 PVCC
COMP 7
18 VCC
DVC 8
17 EN
9 10 11 12 13 14 15 16
ISL6314 Integrated Driver Block Diagram
PWM
SOFT-START
AND
FAULT LOGIC
GATE
CONTROL
LOGIC
SHOOT-
THROUGH
PROTECTION
PVCC
BOOT
UGATE
20kΩ
PHASE
10kΩ
LGATE
2 FN6455.0
March 30, 2007

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Block Diagram
ISENO
ISL6314
OCSET
PGOOD
ISEN-
ISEN+
RGND
VSEN
VDIFF
ISEN AMP
x1
FSD
100µA
OC
FS
SS
VID7
VID6
VID5
VID4
VID3
VID2
VID1
VID0
DVC
REF
FB
COMP
APA
OFS
OPEN SENSE
LINE DETECT
UNDERVOLTAGE
DETECTION
LOGIC
OVERVOLTAGE
DETECTION
LOGIC
FS / DROOP
SELECT
MODE / DAC
SELECT
FSD
DYNAMIC
VID
D/A
2kΩ
x2
E/A
OFFSET
SOFT-START
AND
FAULT LOGIC
CLOCK AND
MODULATOR
WAVEFORM
GENERATOR
100µA
ADAPTIVE PHASE
ALLIGNMENT
CIRCUITRY
EN
0.85V
POWER-ON
RESET
VCC
PVCC
MOSFET
DRIVER
BOOT
UGATE
PHASE
LGATE
PWM
GND
3 FN6455.0
March 30, 2007

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Typical Application - ISL6314
ISL6314
FB DVC VDIFF VSEN RGND
COMP
APA
+5V
VCC
OFS
FS
REF
SS
VID7
VID6
VID5
VID4
VID3
VID2
VID1
VID0
PVCC
ISL6314
BOOT
UGATE
PHASE
LGATE
PGOOD
EN
GND
ISEN+ OCSET ISENO
ISEN-
ROCSET
CCOMP
RCOMP
Rs
+12V
LOAD
4 FN6455.0
March 30, 2007

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ISL6314
Typical Application - ISL6314 with NTC Thermal Compensation
FB DVC VDIFF VSEN RGND
COMP
APA
+5V
VCC
OFS
FS
REF
SS
VID7
VID6
VID5
VID4
VID3
VID2
VID1
VID0
PVCC
ISL6314
BOOT
UGATE
PHASE
LGATE
PGOOD
EN
GND
ISEN+ OCSET ISENO
ISEN-
ROCSET
CCOMP
RCOMP
Rs
+12V
PLACE IN CLOSE
PROXIMITY
NTC
LOAD
5 FN6455.0
March 30, 2007