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LX1671CPW-TR PDF预览

LX1671CPW-TR

更新时间： 2024-11-30 01:12:15
品牌 Logo 应用领域
美高森美 - MICROSEMI 开关光电二极管
页数 文件大小 规格书
21页 425K
描述
Multiple Output LoadSHARE PWM

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中文翻译

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LX1671CPW-TR 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Transferred零件包装代码：TSSOP
包装说明：TSSOP, TSSOP38,.25,20针数：38
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.33
模拟集成电路 - 其他类型：SWITCHING CONTROLLER控制模式：VOLTAGE-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：5.5 V
最小输入电压：4.5 V标称输入电压：5 V
JESD-30 代码：R-PDSO-G38JESD-609代码：e3
长度：9.7 mm湿度敏感等级：1
功能数量：1端子数量：38
最高工作温度：70 °C最低工作温度：
最大输出电流：1 A封装主体材料：PLASTIC/EPOXY
封装代码：TSSOP封装等效代码：TSSOP38,.25,20
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：260认证状态：Not Qualified
座面最大高度：1.1 mm子类别：Switching Regulator or Controllers
表面贴装：YES切换器配置：PHASE-SHIFT
最大切换频率：345 kHz温度等级：COMMERCIAL
端子面层：MATTE TIN端子形式：GULL WING
端子节距：0.5 mm端子位置：DUAL
处于峰值回流温度下的最长时间：40宽度：4.4 mm

LX1671CPW-TR 数据手册

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LX1671  
®
Multiple Output LoadSHARE™ PWM  
TM  
PRODUCTION DATA SHEET  
KEY FEATURES  
DESCRIPTION  
ƒ Up to Four Independently  
Regulated Outputs  
ƒ Outputs As Low As 0.8V  
Generated From An Internal 1%  
Reference  
ƒ Multiphase High Current Output  
Reduces Required Capacitance  
ƒ Integrated High Current MOSFET  
Drivers  
The LX1671 is a highly integrated  
The additional outputs are capable of  
power supply controller IC featuring supplying up to 5A (Linear Regulator  
three PWM switching regulator stages Driver) and 15A (Switching Regulator)  
with an additional onboard linear for I/O, memory, termination, and other  
regulator driver.  
Two of the constant frequency processor designs.  
voltage-mode PWM phases can be  
supplies surrounding today’s micro-  
Each PWM regulator output is  
easily configured for a single Bi-Phase programmed via a simple voltage-divider  
high current output or two in- network.  
dependently regulated outputs. Each MOSFET RDS(ON) impedance, monitors  
phase incorporates fully pro- current limit conditions, in each PWM  
grammable soft-start sequence. This phase, without the use of expensive  
versatility yields either three or four current sense resistors.  
The LX1671, utilizing  
ƒ 300kHz High Frequency Operation  
Minimizes External Component  
Requirements  
ƒ Independent Phase Programmable  
Soft-Start and Power Sequencing  
ƒ Adjustable Linear Regulator Driver  
Output  
a
independently regulated outputs with  
full power sequencing capability giving design engineers maximum flexibility  
system designers the ultimate with respect to the MOSFET supply.  
flexibility in power supply design. Each phase can utilize different supply  
The LX1671 was designed to give  
ƒ No current-sense resistors  
ƒ DDR Termination Compliant  
In Bi-Phase operation, the high voltages for efficient use of available  
current (>30A) output can utilize supply rails. Additionally, when two  
different supply rails allowing Forced phases are configured in Bi-Phase output,  
Current Sharing† from different the LoadSHARETM topology can be  
sources. Power loss and noise, due to programmed via inductor ESR selection.  
the ESR of the input capacitors, are There are three other methods that can  
minimized by operating each PWM also be used with LoadSHARETM. These  
APPLICATIONS/BENEFITS  
ƒ Multi-Output Power Supplies  
ƒ Video Card Power Supplies  
ƒ PC Peripherals  
ƒ Portable PC Processor and I/O  
Supply  
other methods are presented in the theory  
of operation section of this data sheet.  
output 180° out of phase. This  
architecture also minimizes capacitor  
requirements while maximizing re-  
gulator response.  
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com  
LoadSHARE is a Trademark of Microsemi Corporation  
Protected by US Patents: 6,285,571 & 6,292,378  
PRODUCT HIGHLIGHT  
DDR Termination  
Refer to Typical  
Application for  
complete circuit.  
Memory Core  
....  
12V  
5V  
Graphics  
Controller  
Core  
Memory Bus  
LX1671  
DDR Memory  
3.3V  
I/O  
PACKAGE ORDER INFO  
Plastic TSSOP  
38-Pin  
Plastic MLPQ  
PW  
LQ  
TA (°C)  
38-Pin  
RoHS Compliant / Pb-free Transition DC: 0518  
RoHS Compliant / Pb-free Transition DC: 0512  
0 to 70  
LX1671CPW  
LX1671CLQ  
Note: Available in Tape & Reel. Append the letters “TR” to the part number (i.e. LX1671CPW-TR)  
Copyright © 2000  
Rev. 1.2b, 2006-02-13  
Microsemi  
Page 1  
Integrated Products, Power Management  
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570  
1234567...21

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