ISL6327.pdf 데이터시트 (총 30 페이지) - 파일 다운로드 ISL6327 데이타시트 다운로드

No Preview Available !

DATASHEET
ISL6327
Enhanced 6-Phase PWM Controller with 8-Bit VID Code and Differential Inductor
DCR or Resistor Current Sensing
FN9276
Rev 4.00
May 5, 2008
The ISL6327 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 ISL6327 utilizes Intersil’s
proprietary Active Pulse Positioning (APP) and Adaptive
Phase Alignment (APA) modulation scheme to achieve the
extremely fast transient response with fewer output
capacitors.
Today’s microprocessors require a tightly regulated output
voltage position versus load current (droop). The ISL6327
senses the output current continuously by utilizing patented
techniques to measure the voltage across the dedicated
current sense resistor or the DCR of the output inductor.
Current sensing provides the needed signals for precision
droop, channel-current balancing, and overcurrent
protection. A programmable integrated temperature
compensation function is implemented to effectively
compensate the temperature variation of the current sense
element. The current limit function provides the overcurrent
protection for the individual phase.
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 ISL6327 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.
Features
• Proprietary Active Pulse Positioning and Adaptive Phase
Alignment Modulation Scheme
• 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 Resistor 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 Per Bit
- 0.5V to 1.600V Operation Range
• Thermal Monitoring
• Integrated Programmable Temperature Compensation
• Overcurrent Protection and Channel Current Limit
• Overvoltage Protection with OVP Output Indication
• 2, 3, 4, 5 or 6 Phase Operation
• Adjustable Switching Frequency up to 1MHz Per Phase
• 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 (RoHS Compliant)
Ordering Information
PART
NUMBER
(Note)
PART
MARKING
TEMP.
(°C)
PACKAGE PKG.
(Pb-Free) DWG. #
ISL6327CRZ* ISL6327CRZ 0 to +70 48 Ld 7x7 QFN L48.7x7
ISL6327IRZ* ISL6327IRZ -40 to +85 48 Ld 7x7 QFN L48.7x7
*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.
FN9276 Rev 4.00
May 5, 2008
Page 1 of 30

No Preview Available !

ISL6327
Pinout
ISL6327
(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
FN9276 Rev 4.00
May 5, 2008
Page 2 of 30

No Preview Available !

ISL6327
ISL6327 Block Diagram
VDIFF VR_RDY
OVP
RGND
VSEN
X1
OVP
+175MV
S OVP R
DRIVE
Q
SOFT-START
AND
FAULT LOGIC
VCC
POWER-ON
RESET (POR)
0.875V
EN_VTT
0.875V
EN_PWR
CLOCK AND
RAMP
GENERATOR
THREE-STATE
FS
SS
APP AND APA
PWM1
MODULATOR
OFS
REF
DAC
VRSEL
VID7
VID6
VID5
VID4
VID3
VID2
VID1
VID0
COMP
FB
OFFSET
DYNAMIC
VID
D/A
2V
OC2
IOUT
IDROOP
FN9276 Rev 4.00
May 5, 2008
APP AND APA
MODULATOR
PWM2
APP AND APA
MODULATOR
PWM3
APP AND APA
MODULATOR
PWM4
APP AND APA
MODULATOR
PWM5
E/A
APP AND APA
PWM6
MODULATOR
CHANNEL CURRENT
BALANCE AND
CURRENT LIMIT
CHANNEL
DETECT
OC1
I_TRIP
1
N
I_TOT
TEMPERATURE
COMPENSATION
CHANNEL
CURRENT
SENSE
THERMAL
MONITORING
GND
TM VR_FAN VR_HOT
TEMPERATURE
COMPENSATION
GAIN
TCOMP
ISEN1+
ISEN1-
ISEN2+
ISEN2-
ISEN3+
ISEN3-
ISEN4+
ISEN4-
ISEN5+
ISEN5-
ISEN6+
ISEN6-
Page 3 of 30

No Preview Available !

ISL6327
Typical Application - 6-Phase Buck Converter with DCR Sensing and External TCOMP
NTC2
EXTERNAL TCOMP
COMPENSATION
NETWORK
+5V
VCC
BOOT
UGATE
EN
PWM
GND
ISL6609
DRIVER
PHASE
LGATE
VIN
+5V
VTT
VR_RDY
VID7
VID6
VID5
VID4
VID3
VID2
VID1
VID0
VRSEL
OVP
R IOUT
VR_FAN
VR_HOT
+5V
FB
IDROOP
VDIFF
VSEN
RGND
EN_VTT
COMP REF
DAC
VCC
GND
ISL6327
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
ROFS RT
RSS
VIN
NTC
+5V
VCC
BOOT
UGATE
EN
PWM
GND
ISL6609
DRIVER
PHASE
LGATE
+5V
VCC
BOOT
UGATE
EN
PWM
GND
ISL6609
DRIVER
PHASE
LGATE
+5V
VCC
BOOT
UGATE
EN
PWM
GND
ISL6609
DRIVER
PHASE
LGATE
+5V
VCC
BOOT
UGATE
EN
PWM
GND
ISL6609
DRIVER
PHASE
LGATE
+5V
VCC
BOOT
UGATE
EN
PWM
GND
ISL6609
DRIVER
PHASE
LGATE
VIN
VIN
VIN
VIN
VIN
µP
LOAD
FN9276 Rev 4.00
May 5, 2008
Page 4 of 30

No Preview Available !

ISL6327
Typical Application - 6-Phase Buck Converter with DCR Sensing and Integrated TCOMP
+5V
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
ISL6327
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
+5V
ROFS RT
R SS
VIN
NTC
+5V
VCC
EN
PWM
GND
ISL6609
DRIVER
BOOT
UGATE
PHASE
LGATE
+5V
VCC
EN
PWM
GND
ISL6609
DRIVER
BOOT
UGATE
PHASE
LGATE
+5V
VCC
BOOT
UGATE
EN
PWM
GND
ISL6609
DRIVER
PHASE
LGATE
VIN
VIN
VIN
+5V
VCC
BOOT
UGATE
EN
PWM
GND
ISL6609
DRIVER
PHASE
LGATE
+5V
VCC
BOOT
UGATE
EN
PWM
GND
ISL6609
DRIVER
PHASE
LGATE
+5V
VCC
BOOT
UGATE
EN
PWM
GND
ISL6609
DRIVER
PHASE
LGATE
VIN
VIN
VIN
P
LOAD
FN9276 Rev 4.00
May 5, 2008
Page 5 of 30