参数资料
| 型号： | ISL6531CB-T |
| 厂商： | Intersil |
| 文件页数： | 1/17页 |
| 文件大小： | 0K |
| 描述： | IC CONTROLLER INTEL 24SOIC |
| 标准包装： | 1,000 |
| 应用： | 控制器，Intel Pentium? III，IV |
| 输入电压： | 4.5 V ~ 5.5 V |
| 输出数： | 2 |
| 输出电压： | 2.5V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 24-SOIC |
| 包装： | 带卷 (TR) |
?
ISL6531
Data Sheet
August 11, 2005
FN9053.2
Dual 5V Synchronous Buck Pulse-Width
Modulator (PWM) Controller for DDRAM
Memory V DDQ and V TT Termination
The ISL6531 provides complete control and protection for
dual DC-DC converters optimized for high-performance
DDRAM memory applications. It is designed to drive low
cost N-channel MOSFETs in synchronous-rectified buck
topology to efficiently generate 2.5V V DDQ for powering
DDRAM memory, V REF for DDRAM differential signalling,
and V TT for signal termination. The ISL6531 integrates all of
the control, output adjustment, monitoring and protection
functions into a single package.
The V DDQ output of the converter is maintained at 2.5V
through an integrated precision voltage reference. The V REF
output is precisely regulated to 1/2 the memory power
supply, with a maximum tolerance of ± 1% over temperature
and line voltage variations. V TT accurately tracks V REF .
During V2_SD sleep mode, the V TT output is maintained by
a low power window regulator.
The ISL6531 provides simple, single feedback loop, voltage-
mode control with fast transient response for the V DDQ
regulator. The V TT regulator features internal compensation
that eases the design. It includes two phase-locked 300kHz
triangle-wave oscillators which are displaced 90 o to minimize
interference between the two PWM regulators. The
regulators feature error amplifiers with a 15MHz gain-
bandwidth product and 6V/ μ s slew rate which enables high
converter bandwidth for fast transient performance. The
resulting PWM duty ratio ranges from 0% to 100%.
The ISL6531 protects against overcurrent conditions by
inhibiting PWM operation. The ISL6531 monitors the current
in the V DDQ regulator by using the r DS(ON) of the upper
MOSFET which eliminates the need for a current sensing
resistor.
Ordering Information
TEMP
Features
? Provides V DDQ , V REF , and V TT voltages for one- and two-
channel DDRAM memory systems
? Excellent voltage regulation
1 2
- V DDQ = 2.5V ± 2% over full operating range
- V REF = --- ? V DDQ ± 1% over full operating range
- V TT = V REF ± 30mV
? Supports ‘S3’ sleep mode
1 2
- V TT is held at --- ? V DDQ via a low power window
regulator to minimize wake-up time
? Fast transient response
- Full 0% to 100% duty ratio
? Operates from +5V Input
? V TT regulator internally compensated
? Overcurrent fault monitor on VDD
- Does not require extra current sensing element
- Uses MOSFET’s r DS(ON)
? Drives inexpensive N-Channel MOSFETs
? Small converter size
- 300kHz fixed frequency oscillator
? 24 Lead, SOIC or 32 Lead, 5mm × 5mm QFN
? Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
? V DDQ , V TT , and VREF regulation for DDRAM memory
systems
- Main memory in AMD? Athlon? and K8?, Pentium?
III, Pentium IV, Transmeta, PowerPC?, AlphaPC?, and
UltraSparc? based computer systems
? High-power tracking DC-DC regulators
PART NUMBER
ISL6531CB
ISL6531CBZ
(See Note)
RANGE( o C)
0 to 70
0 to 70
PACKAGE
24 Lead SOIC
24 Lead SOIC
(Pb-free)
PKG. DWG. #
M24.3
M24.3
ISL6531CR
0 to 70
32 Lead 5x5 QFN L32.5x5
ISL6530/31EVAL1 Evaluation Board
Add “-T” suffix for tape and reel.
NOTE: Intersil Pb-free plus anneal products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin plate
termination finish, which are 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.
1
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. 2003, 2005. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
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| ISL6531CBZ | 功能描述:IC CONTROLLER INTEL 24SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
| ISL6531CBZ-T | 功能描述:IC CONTROLLER INTEL 24SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
| ISL6531CR | 功能描述:IC CONTROLLER INTEL 32QFN RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
| ISL6531CR-T | 功能描述:IC CONTROLLER INTEL 32QFN RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
| ISL6531CRZ | 功能描述:IC CONTROLLER INTEL 32QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
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