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LM2641MTC-ADJ PDF预览

LM2641MTC-ADJ

更新时间: 2024-09-15 00:01:07
品牌 Logo 应用领域
美国国家半导体 - NSC 稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管
页数 文件大小 规格书
19页 450K
描述
Dual Adjustable Step-Down Switching Power Supply Controller

LM2641MTC-ADJ 技术参数

是否Rohs认证: 不符合生命周期:Transferred
包装说明:TSSOP-28Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.11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: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:1.2 mm子类别:Switching Regulator or Controllers
表面贴装:YES切换器配置:PUSH-PULL
最大切换频率:345 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:30
宽度:4.4 mmBase Number Matches:1

LM2641MTC-ADJ 数据手册

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January 2000  
LM2641  
Dual Adjustable Step-Down Switching Power Supply  
Controller  
General Description  
The LM2641 is a dual step-down power supply controller in-  
tended for application in notebook personal computers and  
other battery-powered equipment.  
Key Specifications  
%
n 96 efficient  
n 5.5 to 30V input range  
n Dual outputs adjustable from 2.2 to 8V  
%
n 0.5 typical load regulation error  
Fixed-frequency synchronous drive of logic-level N-channel  
power MOSFETs is combined with an optional  
pulse-skipping mode to achieve ultra efficient power conver-  
sion 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.  
%
n 0.002 /V typical line regulation error  
Features  
n 300 kHz fixed-frequency switching  
n Switching synchronization with an external signal up to  
400 kHz  
n Optional pulse-skipping mode  
n Adjustable secondary feedback  
n Input undervoltage lockout  
n Output undervoltage shutdown protection  
n Output overvoltage shutdown protection  
n Programmable soft-start (each controller)  
n 5V, 50 mA linear regulator output  
n Precision 2.5V reference output  
n 28-pin TSSOP  
High DC gain and current-mode feedback control assure ex-  
cellent 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 ex-  
ternal clock running as fast as 400 kHz.  
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.  
Logic-level inputs allow the controllers to be turned ON and  
OFF separately.  
Applications  
n Notebook and subnotebook computers  
n Wireless data terminals  
n Battery-powered instruments  
Connection Diagram and Ordering Information  
28-Lead TSSOP (MTC)  
DS100949-1  
Top View  
Order Number LM2641MTC-ADJ  
See NS Package Number MTC28  
© 2000 National Semiconductor Corporation  
DS100949  
www.national.com  

LM2641MTC-ADJ 替代型号

型号 品牌 替代类型 描述 数据表
LM2641MTCX-ADJ NSC

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