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ISL6267

更新时间： 2024-09-23 11:12:23
品牌 Logo 应用领域
英特矽尔 - INTERSIL /
页数 文件大小 规格书
33页 1156K
描述
Multiphase PWM Regulator for AMD Fusion Mobile CPUs

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ISL6267 数据手册

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Multiphase PWM Regulator for AMD Fusion™ Mobile  
CPUs  
ISL6267  
Features  
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.  
• 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  
The PWM modulator of 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.  
- 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  
The ISL6267 has several other key features. Both outputs  
support DCR current sensing with a single NTC thermistor for  
DCR temperature compensation or accurate resistor current  
sensing. Both outputs come with remote voltage sense,  
adjustable switching frequency, current monitor, OC  
protection, independent power-good indicators, temperature  
monitors, and a common thermal alert.  
• 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 TQFN Package  
• Pb-Free (RoHS Compliant)  
Applications  
• AMD Fusion CPU/GPU Core Power  
• Notebook Computers  
Core Performance on ISL6267EVAL1Z  
100  
90  
1.12  
1.10  
1.08  
1.06  
80  
V
= 8V  
IN  
70  
60  
50  
40  
30  
20  
10  
0
V
= 12V  
IN  
V
= 8V  
IN  
V
= 19V  
IN  
1.04  
1.02  
1.00  
0.98  
0.96  
V
= 12V  
IN  
V
= 19V  
IN  
V
CORE = 1.1V  
OUT  
V
CORE = 1.1V  
OUT  
5
0
5
10 15 20 25 30 35 40 45 50 55  
(A)  
0
10 15 20 25 30 35 40 45 50 55  
I
OUT  
I
(A)  
OUT  
FIGURE 2. V  
vs LOAD  
FIGURE 1. EFFICIENCY vs LOAD  
OUT  
FN7801.0  
January 31, 2011  
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.  
1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas Inc. 2011. All Rights Reserved  
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.  
All other trademarks mentioned are the property of their respective owners.  
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 		Multiphase PWM Regulator for AMD Fusion Mobile CPUs
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ISL6267HRZ-T RENESAS

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ISL6268 INTERSIL

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