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ISL6353EVAL1Z

更新时间： 2024-11-21 11:57:27
品牌 Logo 应用领域
英特矽尔 - INTERSIL 稳压器双倍数据速率
页数 文件大小 规格书
30页 1278K
描述
Multiphase PWM Regulator for VR12 DDR Memory Systems

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ISL6353EVAL1Z 数据手册

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Multiphase PWM Regulator for VR12 DDR Memory  
Systems  
ISL6353  
Features  
The ISL6353 is a three-phase PWM buck regulator controller for  
VR12 DDR memory applications. The multi-phase implementation  
results in better system performance, superior thermal  
• VR12 Serial Communications Bus  
• Precision Voltage Regulation  
- 5mV Steps with VID Fast/Slow Slew Rates  
• Supports Two Current Sensing Methods  
- Lossless Inductor DCR Current Sensing  
- Precision Resistor Current Sensing  
management, lower component cost and smaller PCB area.  
The ISL6353 has two integrated power MOSFET drivers for  
implementing a cost effective and space saving power  
management solution.  
• Programmable 1, 2 or 3-Phase Operation  
• Adaptive Body Diode Conduction Time Reduction  
• Superior Noise Immunity and Transient Response  
• Pin Programmable Output Voltage and Power State Mode  
The PWM modulator of the ISL6353 is based on Intersil’s Robust  
Ripple Regulator™ (R ) technology. Compared with the traditional  
multi-phase buck regulator, the R modulator commands variable  
PWM switching frequency during load transients, achieving faster  
transient response. R also naturally goes into pulse frequency  
modulation operation in light load conditions to achieve higher light  
load efficiency.  
3
3
3
• Output Current Monitor and Thermal Monitor  
• Differential Remote Voltage Sensing  
• High Efficiency Across Entire Load Range  
• Programmable Switching Frequency  
The ISL6353 is designed to be completely compliant with VR12  
specifications. The ISL6353 has a serial VID (SVID) bus  
communicating with the CPU. The output can be programmed for  
1-, 2- or 3-phase interleaved operation. The output voltage and  
power state can also be controlled independent of the serial VID  
bus.  
• Resistor Programmable VBOOT, Power State Operation, SVID  
Address Setting, I  
MAX  
• Excellent Dynamic Current Balance Between Phases  
• OCP/WOC, OVP, OT Alert, PGOOD  
The ISL6353 has several other key features. It supports DCR  
current sensing with a single NTC thermistor for DCR  
temperature compensation or accurate resistor current sensing.  
It also has remote voltage sense, adjustable switching frequency,  
current monitor, OC/OV protection and power-good. Temperature  
monitor and thermal alert is available too.  
• Small Footprint 40 Ld 5x5 TQFN Package  
• Pb-Free (RoHS Compliant)  
Applications  
• DDR Memory  
95  
1.5V PS0  
COMP  
200mV/DIV  
1.5V PS1 2ph CCM  
94  
93  
92  
91  
90  
89  
88  
87  
86  
85  
1.5V PS2 1ph DE  
1.35VPS0  
VDDQ = 1.5V  
50mV/DIV  
PHASE1/2/3  
5V/DIV  
1.35V PS1 2ph CCM  
1.35VPS2 1ph DE  
26A STEP LOAD  
1V/DIV  
0
10  
20  
30  
40  
50  
60  
70  
80  
20µs/DIV  
LOAD (A)  
FIGURE 2. ISL6353EVAL1Z EFFICIENCY vs LOAD  
FIGURE 1. FAST TRANSIENT RESPONSE  
FN6897.0  
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.  
1
September 15, 2011  
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