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®
Data Sheet
March 9, 2006
ISL6307B
FN9225.0
6-Phase VR11 PWM Controller with 8-Bit
VID Code Capable of Precision RDS(ON) or
DCR Differential Current Sensing for
Applications in Which Supply Voltage is
Higher than 5V
The ISL6307B controls microprocessor core voltage
regulation by driving up to 6 synchronous-rectified buck
channels in parallel. Multiphase buck converter architecture
uses interleaved timing to multiply channel ripple frequency
and reduce input and output ripple currents. Lower ripple
results in fewer components, lower component cost, reduced
power dissipation, and smaller implementation area.
Microprocessor loads can generate load transients with
extremely fast edge rates. The ISL6307B features a high
bandwidth control loop and ripple frequencies up to 6MHz to
provide optimal response to the transients.
Today’s microprocessors require a tightly regulated output
voltage position versus load current (droop). The ISL6307B
senses current by utilizing patented techniques to measure
the voltage across the on resistance, RDS(ON), of the lower
MOSFETs or DCR, of the output inductor during the lower
MOSFET conduction intervals. Current sensing provides the
needed signals for precision droop, channel-current
balancing, and overcurrent protection. A programmable
internal temperature compensation function is implemented
to effectively compensate for the temperature coefficient of
the current sense element.
A unity gain, differential amplifier is provided for remote
voltage sensing. Any potential difference between remote
and local grounds can be completely eliminated using the
remote-sense amplifier. Eliminating ground differences
improves regulation and protection accuracy. The threshold-
sensitive enable input is available to accurately coordinate
the start up of the ISL6307B with any other voltage rail.
Dynamic-VID™ technology allows seamless on-the-fly VID
changes. The offset pin allows accurate voltage offset
settings that are independent of VID setting.
Ordering Information
PART NUMBER
TEMP.
(°C)
PACKAGE
PKG.
DWG. #
ISL6307BCRZ (Note) 0 to 70 48 Ld 7x7 QFN (Pb-free) L48.7x7
ISL6307BIRZ (Note) -40 to 85 48 Ld 7x7 QFN (Pb-free) L48.7x7
Add “-T” suffix for tape and reel.
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.
Features
• Precision multiphase Core Voltage Regulation
- Differential Remote Voltage Sensing
- ±0.5% System Accuracy Over Life, Load, Line and
Temperature
- Adjustable Precision Reference-Voltage Offset
• Precision RDS(ON) or DCR Current Sensing
- Accurate Load-Line Programming
- Accurate Channel-Current Balancing
- Differential Current Sense
• Microprocessor Voltage Identification Input
- Dynamic VID™ Technology
- 8-Bit VID Input with Selectable VR11 Code and
Extended VR10 Code at 6.25mV Step
- 0.5V to 1.600V operation range
• Threshold-sensitive Enable Function for Power
Sequencing and VTT Enable
• Thermal Monitoring
• Internal 5V Shunt Regulator
• Programmable Temperature Compensation
• Overcurrent Protection
• Overvoltage Protection with OVP Output Indication
• 2, 3, 4, 5 or 6 Phase Operation
• Adjustable Switching Frequency up to 1MHz Per Phase
• QFN Package Option
- QFN Compliant to JEDEC PUB95 MO-220 QFN - Quad
Flat No Leads - Product Outline
- QFN Near Chip Scale Package Footprint; Improves
PCB Efficiency, Thinner in Profile
• Pb-Free Plus Anneal Available (RoHS Compliant)
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.
Dynamic VID™ is a trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

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Pinout
ISL6307B
ISL6307B (48 LD QFN)
TOP VIEW
48 47 46 45 44 43 42 41 40 39 38 37
VID7 1
VID6 2
VID5 3
VID4 4
VID3 5
VID2 6
VID1 7
VID0 8
VRSEL 9
OFS 10
IOUT 11
DAC 12
GND
36 PWM3
35 ISEN3+
34 ISEN3-
33 ISEN1-
32 ISEN1+
31 PWM1
30 PWM4
29 ISEN4+
28 ISEN4-
27 ISEN2-
26 ISEN2+
25 PWM2
13 14 15 16 17 18 19 20 21 22 23 24
2 FN9225.0
March 9, 2006

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ISL6307B
ISL6307B Block Diagram
VDIFF VR_RDY
OVP
RGND
VSEN
x1
OVP
+200mV
S OVP R
DRIVE
Q
SOFT-START
AND
FAULT LOGIC
VCC
SHUNT
REGULATOR
POWER-ON
RESET (POR)
0.875V
EEN_VTT
0.875V
EN_PWR
CLOCK AND
SAWTOOTH
GENERATOR
THREE-STATE
FS
SS
PWM
PWM1
OFS
REF
DAC
VRSEL
VID7
VID6
VID5
VID4
VID3
VID2
VID1
VID0
COMP
FB
OFFSET
DYNAMIC
VID
D/A
2V
OC2
IOUT
IDROOP
PWM
PWM
PWM
PWM
E/A
PWM
CHANNEL
CURRENT
BALANCE
CHANNEL
DETECT
OC1
I_TRIP
1
N
I_TOT
TEMPERATURE
COMPENSATION
CHANNEL
CURRENT
SENSE
THERMAL
MONITORING
TEMPERATURE
COMPENSATION
GAIN
GND
TM VR_FAN VR_HOT
TCOMP
3
PWM2
PWM3
PWM4
PWM5
PWM6
ISEN1+
ISEN1-
ISEN2+
ISEN2-
ISEN3+
ISEN3-
ISEN4+
ISEN4-
ISEN5+
ISEN5-
ISEN6+
ISEN6-
FN9225.0
March 9, 2006

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ISL6307B
Typical Application - 6-Phase Buck Converter with RDS(ON) Sensing and External TCOMP
NTC2
EXTERNAL TCOMP
COMPENSATION
NETWORK
+12V
VTT
VR_RDY
VID7
VID6
VID5
VID4
VID3
VID2
VID1
VID0
VRSEL
OVP
R IOUT
VR_FAN
VR_HOT
+5V
FB
IDROOP
VDIFF
COMP REF
DAC
VSEN
RGND
EN_VTT
VCC
GND
ISL6307B
PWM6
ISEN6-
ISEN6+
PWM4
ISEN4-
ISEN4+
PWM2
ISEN2-
ISEN2+
IOUT
PWM1
ISEN1-
ISEN1+
PWM3
ISEN3-
ISEN3+
PWM5
ISEN5-
ISEN5+
TM EN_PWR
TCOMP OFS FS SS
300
ROFS RT
R SS
+12V
NTC
+12V
VCC
BOOT
UGATE
PVCC
PWM
GND
ISL6612
DRIVER
PHASE
LGATE
+12V
VCC
BOOT
UGATE
PVCC
PWM
GND
ISL6612
DRIVER
PHASE
LGATE
+12V
VCC
BOOT
UGATE
PVCC
PWM
GND
ISL6612
DRIVER
PHASE
LGATE
VIN
VIN
VIN
+12V
VCC
BOOT
UGATE
PVCC
PWM
GND
ISL6612
DRIVER
PHASE
LGATE
+12V
VCC
BOOT
UGATE
PVCC
PWM
GND
ISL6612
DRIVER
PHASE
LGATE
+12V
VCC
BOOT
UGATE
PVCC
PWM
GND
ISL6612
DRIVER
PHASE
LGATE
VIN
VIN
VIN
µP
LOAD
4 FN9225.0
March 9, 2006

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ISL6307B
Typical Application - 6-Phase Buck Converter with RDS(ON) Sensing and Integrated TCOMP
+12V
300
FB
IDROOP
VDIFF
COMP REF
DAC
VSEN
RGND
VTT EN_VTT
VCC
GND
VR_RDY
VID7
VID6
VID5
VID4
VID3
VID2
VID1
VID0
VRSEL
OVP
ISL6307B
PWM6
ISEN6-
ISEN6+
PWM4
ISEN4-
ISEN4+
PWM2
ISEN2-
ISEN2+
IOUT
R IOUT
VR_FAN
VR_HOT
PWM1
ISEN1-
ISEN1+
PWM3
ISEN3-
ISEN3+
PWM5
ISEN5-
ISEN5+
TM EN_PWR
+5V TCOMP OFS FS SS
+5V
ROFS RT
R SS
+12V
NTC
+12V
VCC
PVCC
PWM
GND
ISL6612
DRIVER
BOOT
UGATE
PHASE
LGATE
+12V
VCC
BOOT
UGATE
PVCC
PWM
GND
ISL6612
DRIVER
PHASE
LGATE
+12V
VCC
BOOT
UGATE
PVCC
PWM
GND
ISL6612
DRIVER
PHASE
LGATE
VIN
VIN
VIN
+12V
VCC
BOOT
UGATE
PVCC
PWM
GND
ISL6612
DRIVER
PHASE
LGATE
+12V
VCC
BOOT
UGATE
PVCC
PWM
GND
ISL6612
DRIVER
PHASE
LGATE
+12V
VCC
BOOT
UGATE
PVCC
PWM
GND
ISL6612
DRIVER
PHASE
LGATE
VIN
VIN
VIN
µP
LOAD
5 FN9225.0
March 9, 2006