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LM2640MTCX-ADJ PDF预览

LM2640MTCX-ADJ

更新时间： 2024-11-23 20:07:23
品牌 Logo 应用领域
德州仪器 - TI 开关光电二极管
页数 文件大小 规格书
29页 1432K
描述
SWITCHING CONTROLLER, 230kHz SWITCHING FREQ-MAX, PDSO28, TSSOP-28

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LM2640MTCX-ADJ 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Obsolete零件包装代码：SSOP
包装说明：TSSOP-28针数：28
Reach Compliance Code：not_compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.19
模拟集成电路 - 其他类型：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 VJESD-30 代码：R-PDSO-G28
JESD-609代码：e0长度：9.7 mm
湿度敏感等级：3功能数量：1
端子数量：28封装主体材料：PLASTIC/EPOXY
封装代码：TSSOP封装等效代码：TSSOP28,.25
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：235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：BUCK
最大切换频率：230 kHz端子面层：Tin/Lead (Sn/Pb)
端子形式：GULL WING端子节距：0.65 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：4.4 mmBase Number Matches：1

LM2640MTCX-ADJ 数据手册

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LM2640  
www.ti.com  
SNVS019B –DECEMBER 1998–REVISED APRIL 2013  
LM2640 Dual Adjustable Step-Down Switching Power Supply Controller  
Check for Samples: LM2640  
1
FEATURES  
DESCRIPTION  
The LM2640 is a dual step-down power supply  
controller intended for application in notebook  
personal computers and other battery-powered  
equipment.  
2
•
•
200 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 Package  
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  
200 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  
5.5V to 30V Input Range  
Dual Outputs Adjustable from 2.2V to 6V  
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 © 1998–2013, Texas Instruments Incorporated  
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