DATASHEET
ISL6314
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.
FN6455
Rev 2.00
Oct 8, 2009
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 (RoHS compliant)
Ordering Information
PART
NUMBER
(Note)
PART
MARKING
TEMP.
RANGE
(°C)
0 to +70
PACKAGE
(Pb-free)
PKG.
DWG. #
ISL6314CRZ* ISL6314 CRZ
ISL6314IRZ*
ISL6314 IRZ
32 Ld 5x5 QFN L32.5x5B
-40 to +85 32 Ld 5x5 QFN L32.5x5B
*Add “-T” suffix for tape and reel. Please refer to TB347 for details on
reel specifications.
NOTE: These Intersil Pb-free plastic packaged products employ
special Pb-free material sets, molding compounds/die attach
materials, and 100% matte tin plate plus anneal (e3 termination finish,
which is 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.
FN6455 Rev 2.00
Oct 8, 2009
Page 1 of 32
ISL6314
Pinout
ISL6314
(32 LD QFN)
TOP VIEW
VID0
VID1
VID2
VID3
VID4
VID5
26
VID7
VID6
25
24 PHASE
23 UGATE
22 BOOT
33
GND
21 LGATE
20 NC
19 PVCC
18 VCC
17 EN
9
FB
10
VDIFF
11
RGND
12
VSEN
13
OCSET
14
ISENO
15
ISEN-
16
ISEN+
32
PGOOD
SS
FS
REF
OFS
APA
COMP
DVC
1
2
3
4
5
6
7
8
31
30
29
28
27
ISL6314 Integrated Driver Block Diagram
PVCC
BOOT
UGATE
20k
GATE
CONTROL
LOGIC
SHOOT-
THROUGH
PROTECTION
10k
PHASE
PWM
SOFT-START
AND
FAULT LOGIC
LGATE
FN6455 Rev 2.00
Oct 8, 2009
Page 2 of 32
ISL6314
Block Diagram
ISENO
OCSET
PGOOD
EN
ISEN-
ISEN+
ISEN AMP
RGND
VSEN
x1
FSD
VDIFF
OC
100µA
0.85V
OPEN SENSE
LINE DETECT
SOFT-START
AND
FAULT LOGIC
POWER-ON
RESET
VCC
PVCC
UNDERVOLTAGE
DETECTION
LOGIC
OVERVOLTAGE
DETECTION
LOGIC
FS
FS/DROOP
SELECT
FSD
BOOT
SS
VID7
VID6
VID5
VID4
VID3
VID2
VID1
VID0
DVC
REF
FB
COMP
APA
OFS
MODE/DAC
SELECT
MOSFET
DRIVER
UGATE
PHASE
LGATE
DYNAMIC
VID
D/A
2k
CLOCK AND
MODULATOR
WAVEFORM
GENERATOR
x2
100µA
E/A
ADAPTIVE PHASE
ALLIGNMENT
CIRCUITRY
OFFSET
PWM
GND
FN6455 Rev 2.00
Oct 8, 2009
Page 3 of 32
ISL6314
Typical Application - ISL6314
FB
DVC VDIFF VSEN
RGND
COMP
APA
Typical Applications
+5V
VCC
1. PVCC = 12V; VIN =12V;
2. PVCC = 5V; VIN = 19V;
other combinations are also possible
OFS
FS
REF
PVCC
PVCC
VIN
BOOT
SS
UGATE
PHASE
ISL6314
LGATE
VID7
VID6
VID5
VID4
VID3
VID2
VID1
VID0
LOAD
PGOOD
EN
GND
ISEN+ OCSET ISENO
R
OCSET
C
COMP
R
COMP
ISEN-
R
s
FN6455 Rev 2.00
Oct 8, 2009
Page 4 of 32
ISL6314
Typical Application - ISL6314 with NTC
Thermal Compensation
FB
DVC VDIFF VSEN
RGND
COMP
APA
+5V
VCC
OFS
FS
REF
PVCC
+12V
BOOT
SS
UGATE
PHASE
PLACE IN CLOSE
PROXIMITY
ISL6314
LGATE
VID7
VID6
VID5
VID4
VID3
VID2
VID1
VID0
NTC
LOAD
PGOOD
EN
GND
ISEN+ OCSET ISENO
R
OCSET
ISEN-
R
s
C
COMP
R
COMP
FN6455 Rev 2.00
Oct 8, 2009
Page 5 of 32
