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| 型号： | ISL6539IAZ |
| 厂商： | Intersil |
| 文件页数： | 1/20页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR DDR DRAM, SDRAM 28QSOP |
| 标准包装： | 48 |
| 应用： | 控制器，DDR DRAM，SDRAM |
| 输入电压： | 3.3 V ~ 18 V |
| 输出数： | 2 |
| 输出电压： | 0.9 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 28-SSOP/QSOP |
| 包装： | 管件 |
| 产品目录页面： | 1243 (CN2011-ZH PDF) |
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ISL6539
Data Sheet
April 29, 2010
FN9144.6
Wide Input Range Dual PWM Controller
with DDR Option
The ISL6539 dual PWM controller delivers high efficiency and
tight regulation from two voltage regulating synchronous buck
DC/DC converters. It was designed especially for DDR DRAM,
SDRAM, graphic chipset applications, and system regulators in
high performance applications.
Voltage-feed-forward ramp modulation, current mode
control, and internal feedback compensation provide fast
response to input voltage and output load transients. Input
current ripple is minimized by channel-to-channel PWM
phase shift of 0°, 90° or 180° (determined by input voltage
and status of the DDR pin).
The ISL6539 can control two independent output voltages
adjustable from 0.9V to 5.5V or, by activating the DDR pin,
transform into a complete DDR memory power supply
solution. In DDR mode, CH2 output voltage VTT tracks CH1
output voltage VDDQ. CH2 output can both source and sink
current, an essential power supply feature for DDR memory.
The reference voltage VREF required by DDR memory is
generated as well.
In dual power supply applications the ISL6539 monitors the
output voltage of both CH1 and CH2. An independent
PGOOD (power good) signal is asserted for each channel
after the soft-start sequence has completed, and the output
voltage is within PGOOD window. In DDR mode CH1
generates the only PGOOD signal.
Built-in overvoltage protection prevents the output from going
above 115% of the set point by holding the lower MOSFET on
and the upper MOSFET off. When the output voltage decays
below the overvoltage threshold, normal operation
automatically resumes. Once the soft-start sequence has
completed, undervoltage protection latches the offending
channel off if the output drops below 75% of its set point value
for the dual switcher. Adjustable overcurrent protection (OCP)
monitors the voltage drop across the r DS(ON) of the lower
MOSFET. If more precise current-sensing is required, an
external current sense resistor may be used.
Features
? Provides Regulated Output Voltage in the Range of 0.9V
to 5.5V
? Complete DDR Memory Power Solution with VTT Tracks
VDDQ/2 and VDDQ/2 Buffered Reference Output
? Supports both DDR-I and DDR2 Memory
? Lossless r DS(ON) Current-Sense Sensing
? Excellent Dynamic Response with Voltage Feed-Forward
and Current Mode Control Accommodating Wide Range
LC Filter Selections
? Dual Mode Operation - Operates Directly from a 5.0V to
15V Input or 3.3V/5V System Rail
? Undervoltage Lock-out on VCC Pin
? Power-good, Overcurrent, Overvoltage, Undervoltage
protection for both Channels
? Synchronized 300kHz PWM Operation in PWM Mode
? Pb-Free (RoHS Compliant)
Applications
? Single and Dual Channel DDR Memory Power Systems
? Graphics Cards - GPU and Memory Supplies
? Supplies for Servers, Motherboards, FPGAs
? ASIC Power Supplies
? Embedded Processor and I/O Supplies
? DSP Supplies
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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.
Copyright Intersil Americas Inc. 2004-2006, 2007, 2010. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL6539IAZ-T | 功能描述:电流型 PWM 控制器 ISL6539 DL SWITCHER 15V INDUSTRIAL GRD RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| ISL6540ACRZ | 功能描述:IC REG CTRLR BUCK PWM VM 28-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:75 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:1MHz 占空比:81% 电源电压:4.3 V ~ 13.5 V 降压:是 升压:是 回扫:是 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:0°C ~ 70°C 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:管件 产品目录页面:1051 (CN2011-ZH PDF) 其它名称:296-2543-5 |
| ISL6540ACRZ-T | 功能描述:IC REG CTRLR BUCK PWM VM 28-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 特色产品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 标准包装:1 系列:PowerWise® PWM 型:电压模式 输出数:1 频率 - 最大:1MHz 占空比:81% 电源电压:4.5 V ~ 18 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-5°C ~ 125°C 封装/外壳:32-WFQFN 裸露焊盘 包装:Digi-Reel® 产品目录页面:1303 (CN2011-ZH PDF) 其它名称:LM3754SQDKR |
| ISL6540ACRZ-TR5453 | 制造商:Intersil Corporation 功能描述:STD. ISL6540ACRZ-T W/GOLD BOND WIRE ONLY - Tape and Reel |
| ISL6540AIRZ | 功能描述:IC REG CTRLR BUCK PWM VM 28-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:275kHz 占空比:50% 电源电压:18 V ~ 110 V 降压:无 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:-40°C ~ 85°C 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) |
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