ISL6267.pdf 데이터시트 (총 30 페이지) - 파일 다운로드 ISL6267 데이타시트 다운로드

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DATASHEET
ISL6267
Multiphase PWM Regulator for AMD Fusion™ Mobile CPUs
FN7801
Rev 1.00
Jan 8, 2013
The ISL6267 is designed to be completely compliant with AMD
Fusion™ specifications. The ISL6267 controls two Voltage
Regulators (VRs), with three integrated gate drivers. The first
VR can be configured as 3-, 2-, or 1-phase VR, while the second
output can be configured as 2- or 1-phase VR, providing
maximum flexibility. The two VRs share the serial control bus
to communicate with the CPU and achieve lower cost and
smaller board area compared with two-chip solutions.
The PWM modulator of the ISL6267 is based on Intersil’s R3
(Robust Ripple Regulator) Technology™. Compared with the
traditional multi-phase buck regulator, the R3 modulator
commands variable switching frequency during load
transients, achieving faster transient response. With the same
modulator, it naturally goes into pulse frequency modulation in
light load conditions, which achieves higher light load
efficiency and extends battery life.
The ISL6267 has several other key features. Both outputs
support DCR current sensing with a single NTC thermostat for
DCR temperature compensation or accurate resistor current
sensing. Both of the outputs utilize remote voltage sense,
adjustable switching frequency, current monitor, OC
protection, independent power-good indicators, temperature
monitors, and a common thermal alert.
Applications
• AMD fusion CPU/GPU core power
• Notebook computer
Features
• Supports AMD SVI 1.0 serial data bus interface
• Dual output controller with integrated drivers
- Core VR configurable 3-, 2-, 1-phase with two integrated
drivers
- Northbridge VR configurable 2- or 1-phase with one
integrated driver
• Precision voltage regulation
- 0.5% system accuracy over-temperature
- 0V to 1.55V in 12.5mV steps
- Enhanced load line accuracy
• Supports multiple current sensing methods
- Lossless inductor DCR current sensing
- Precision resistor current sensing
• Programmable 1-, 2- or 3-phase for the core output and 1- or
2-phase for the northbridge output
• Adaptive body diode conduction time reduction
• Superior noise immunity and transient response
• Output current monitor and thermal monitor
• Differential remote voltage sensing
• High efficiency across entire load range
• Programmable +VID offset for both core and NB
• Programmable switching frequency for both outputs
• Excellent dynamic current balance between phases
• OCP/WOC, OVP, PGOOD, and thermal monitor
• Small footprint 48 Ld 6x6 QFN package
• Pb-free (RoHS compliant)
Core Performance on ISL6267EVAL1Z
100
90
80
70
60
50
40
30
20
10
0
0
VIN = 12V
VIN = 19V
VIN = 8V
VOUT CORE = 1.1V
5 10 15 20 25 30 35 40 45 50 55
IOUT (A)
FIGURE 1. EFFICIENCY vs LOAD
1.12
1.10
1.08
1.06
1.04
1.02
VIN = 12V
VIN = 8V
1.00
VIN = 19V
0.98 VOUT CORE = 1.1V
0.96 0 5 10 15 20 25 30 35 40 45 50 55
IOUT (A)
FIGURE 2. VOUT vs LOAD
FN7801 Rev 1.00
Jan 8, 2013
Page 1 of 33

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ISL6267
Simplified Application Circuit For High Power CPU Core
VNB1
VNB2
ISEN1_NB
ISEN2_NB
ISUMN_NB
ISUMP_NB
BOOT_NB
UG1_NB
PH1_NB
LG1_NB
VIN
NB_PH1
VNB
VNB1
VNB_SENSE
µP
VCORE_SENSE
VO1
VO2
VO3
VW_NB
PWM2_NB
COMP_NB
FB_NB
FB2_NB
VSEN_NB
RTN_NB
PWROK
SVD
SVC
ISL6267
VW
NTC_NB
PROG1
PROG2
VR_HOT
NTC
PWM3
COMP
FB
VSEN
RTN
BOOT2
UG2
PH2
LG2
ISEN3
ISEN2
ISEN1
ISUMN
ISUMP
BOOT1
UG1
PH1
LG1
NB_PH2
THERMAL INDICATOR
VIN
PH3
VIN
PH2
VIN
PH1
VNB2
VO3
VCORE
VO2
VO1
FN7801 Rev 1.00
Jan 8, 2013
FIGURE 3. TYPICAL APPLICATION CIRCUIT USING INDUCTOR DCR SENSING
Page 2 of 33

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ISL6267
Simplified Application Circuit For AMD Torpedo Platform
VNB1
VNB2
VNB_SENSE
µP
VCORE_SENSE
VO1
VO2
ISEN1_NB
ISEN2_NB
ISUMN_NB
ISUMP_NB
NTC_NB
BOOT_NB
UG1_NB
PH1_NB
LG1_NB
VIN
NB_PH1
VNB
VNB1
VW_NB
COMP_NB
FB_NB
FB2_NB
PWM2_NB
VSEN_NB
RTN_NB
PWROK
SVD
SVC
VW
ISL6267
COMP
FB
ISEN3/FB2
VSEN
RTN
ISEN2
ISEN1
ISUMN
NTC
VR_HOT
PROG1
PROG2
PWM3
BOOT2
UG2
PH2
LG2
BOOT1
UG1
PH1
LG1
ISUMP
VIN
NB_PH2
VNB2
THERMAL INDICATOR
+5V
VIN
VCORE
PH2
VIN
VO2
PH1
VO1
FN7801 Rev 1.00
Jan 8, 2013
FIGURE 4. TYPICAL APPLICATION CIRCUIT USING INDUCTOR DCR SENSING
Page 3 of 33

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ISL6267
Simplified Application Circuit For Low Power CPU Core And NB
VNB1
+5V
OPEN
ISEN2_NB
ISEN1_NB
ISUMN_NB
ISUMP_NB
BOOT_NB
UG1_NB
PH1_NB
LG1_NB
VIN
NB_PH1
VNB
VNB1
optional
VW_NB
COMP_NB
NTC_NB
PWM2_NB
OPEN
VNB_SENSE
µP
OPEN
+5V
OPEN
optional
VCORE_SENSE
VO1
FB_NB
VSEN_NB
RTN_NB
PWROK
SVD
SVC
ISL6267
ISEN1
ISEN2
ISEN3
VW
COMP
FB
VSEN
RTN
ISUMN
PROG1
PROG2
NTC
VR_HOT
THERMAL INDICATOR
PWM3
BOOT2 OPEN
UG2
PH2
OPEN
OPEN
+5V
LG2 OPEN
PGND2
BOOT1
UG1
OPEN
PH1
LG1
VIN
PH1
ISUMP
VCORE
VO1
FIGURE 5. TYPICAL APPLICATION CIRCUIT USING INDUCTOR DCR SENSING
FN7801 Rev 1.00
Jan 8, 2013
Page 4 of 33

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ISL6267
Simplified Application Circuit Showing Resistor Sensing
NB_N
+5V
ISEN2_NB
OPEN ISEN1_NB
ISUMN_NB
ISUMP_NB
BOOT_NB
UG1_NB
PH1_NB
LG1_NB
VIN
VNB
NB_P
NB_N
optional
VW_NB
COMP_NB
NTC_NB
PWM2_NB
OPEN
VNB_SENSE
µP
OPEN
+5V
OPEN
optional
VCORE_SENSE
FB_NB
VSEN_NB
RTN_NB
PWROK
SVD
SVC
ISL6267
PROG1
PROG2
NTC
VR_HOT
PWM3
ISEN1
ISEN2
ISEN3
VW
COMP
FB
VSEN
RTN
BOOT2
UG2
PH2
LG2
PGND2
BOOT1
UG1
PH1
LG1
THERMAL INDICATOR
OPEN
OPEN
OPEN
+5V
OPEN
OPEN
VIN
VON
ISUMN
ISUMP
VCORE
VOP
VON
FN7801 Rev 1.00
Jan 8, 2013
FIGURE 6. TYPICAL APPLICATION CIRCUIT USING INDUCTOR DCR SENSING
Page 5 of 33