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LM2641-ADJMDC

更新时间： 2024-11-23 12:58:23
品牌 Logo 应用领域
德州仪器 - TI 开关控制器
页数 文件大小 规格书
31页 1364K
描述
DUAL SWITCHING CONTROLLER, 345kHz SWITCHING FREQ-MAX, UUC, DIE

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LM2641-ADJMDC 技术参数

生命周期：Obsolete零件包装代码：DIE
包装说明：DIE,Reach Compliance Code：unknown
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.61模拟集成电路 - 其他类型：DUAL SWITCHING CONTROLLER
控制模式：CURRENT-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：30 V最小输入电压：5.5 V
标称输入电压：10 VJESD-30 代码：X-XUUC-N
功能数量：1封装主体材料：UNSPECIFIED
封装代码：DIE封装形状：UNSPECIFIED
封装形式：UNCASED CHIP认证状态：Not Qualified
表面贴装：YES切换器配置：PUSH-PULL
最大切换频率：345 kHz端子形式：NO LEAD
端子位置：UPPERBase Number Matches：1

LM2641-ADJMDC 数据手册

 浏览型号LM2641-ADJMDC的Datasheet PDF文件第2页浏览型号LM2641-ADJMDC的Datasheet PDF文件第3页浏览型号LM2641-ADJMDC的Datasheet PDF文件第4页浏览型号LM2641-ADJMDC的Datasheet PDF文件第5页浏览型号LM2641-ADJMDC的Datasheet PDF文件第6页浏览型号LM2641-ADJMDC的Datasheet PDF文件第7页 
LM2641  
www.ti.com  
SNVS040B –JANUARY 2000–REVISED APRIL 2013  
LM2641 Dual Adjustable Step-Down Switching Power Supply Controller  
Check for Samples: LM2641  
1
FEATURES  
DESCRIPTION  
The LM2641 is a dual step-down power supply  
controller intended for application in notebook  
personal computers and other battery-powered  
equipment.  
2
•
•
300 kHz Fixed-Frequency Switching  
Switching Synchronization with an External  
Signal up to 400 kHz  
•
•
•
•
•
•
•
•
•
Optional Pulse-Skipping Mode  
Adjustable Secondary Feedback  
Input Undervoltage Lockout  
Fixed-frequency synchronous drive of logic-level N-  
channel power MOSFETs is combined with an  
optional pulse-skipping mode to achieve ultra efficient  
power conversion over a 1000:1 load current range.  
The pulse-skipping mode can be disabled in favor of  
fixed-frequency operation regardless of the load  
current level.  
Output Undervoltage Shutdown Protection  
Output Overvoltage Shutdown Protection  
Programmable Soft-Start (Each Controller)  
5V, 50 mA Linear Regulator Output  
Precision 2.5V Reference Output  
28-pin TSSOP  
High DC gain and current-mode feedback control  
assure excellent line and load regulation and a wide  
loop bandwidth for fast response to dynamic loads.  
An internal oscillator fixes the switching frequency at  
300 kHz. Optionally, switching can be synchronized  
to an external clock running as fast as 400 kHz.  
APPLICATIONS  
•
•
•
Notebook and Subnotebook Computers  
Wireless Data Terminals  
An optional soft-start feature limits current surges  
from the input power supply at start up and provides  
a simple means of start-up sequencing.  
Battery-Powered Instruments  
Logic-level inputs allow the controllers to be turned  
ON and OFF separately.  
KEY SPECIFICATIONS  
•
•
•
•
•
96 % Efficient  
5.5 – 30 V Input Range  
Dual Outputs Adjustable from 2.2 – 8 V  
0.5 % Typical Load Regulation Error  
0.002 %/V Typical Line Regulation Error  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
2
All trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2000–2013, Texas Instruments Incorporated  
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