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LM3478QMM PDF预览

LM3478QMM

更新时间: 2024-11-21 05:42:03
品牌 Logo 应用领域
美国国家半导体 - NSC 稳压器开关控制器
页数 文件大小 规格书
22页 489K
描述
High Efficiency Low-Side N-Channel Controller for Switching Regulator

LM3478QMM 技术参数

是否Rohs认证: 不符合生命周期:Transferred
包装说明:MSOP-8Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.16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:40 V最小输入电压:2.97 V
标称输入电压:12 VJESD-30 代码:S-PDSO-G8
JESD-609代码:e0长度:3 mm
湿度敏感等级:1功能数量:1
端子数量:8最高工作温度:125 °C
最低工作温度:-40 °C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:TSSOP8,.19封装形状:SQUARE
封装形式:SMALL OUTLINE, THIN PROFILE, SHRINK PITCH认证状态:Not Qualified
座面最大高度:1.09 mm子类别:Switching Regulator or Controllers
表面贴装:YES切换器配置:SINGLE
最大切换频率:1000 kHz温度等级:AUTOMOTIVE
端子面层:Tin/Lead (Sn85Pb15)端子形式:GULL WING
端子节距:0.65 mm端子位置:DUAL
宽度:3 mmBase Number Matches:1

LM3478QMM 数据手册

 浏览型号LM3478QMM的Datasheet PDF文件第2页浏览型号LM3478QMM的Datasheet PDF文件第3页浏览型号LM3478QMM的Datasheet PDF文件第4页浏览型号LM3478QMM的Datasheet PDF文件第5页浏览型号LM3478QMM的Datasheet PDF文件第6页浏览型号LM3478QMM的Datasheet PDF文件第7页 
March 30, 2009  
LM3478/LM3478Q  
High Efficiency Low-Side N-Channel Controller for  
Switching Regulator  
General Description  
Features  
The LM3478 is a versatile Low-Side N-Channel MOSFET  
controller for switching regulators. It is suitable for use in  
topologies requiring a low side MOSFET, such as boost, fly-  
back, SEPIC, etc. Moreover, the LM3478 can be operated at  
extremely high switching frequency in order to reduce the  
overall solution size. The switching frequency of the LM3478  
can be adjusted to any value between 100kHz and 1MHz by  
using a single external resistor. Current mode control pro-  
vides superior bandwidth and transient response, besides  
cycle-by-cycle current limiting. Output current can be pro-  
grammed with a single external resistor.  
LM3478Q is AEC-Q100 qualified and manufactured on an  
Automotive Grade Flow  
8-lead Mini-SO8 (MSOP-8) package  
Internal push-pull driver with 1A peak current capability  
Current limit and thermal shutdown  
Frequency compensation optimized with a capacitor and  
a resistor  
Internal softstart  
Current Mode Operation  
Undervoltage Lockout with hysteresis  
The LM3478 has built in features such as thermal shutdown,  
short-circuit protection, over voltage protection, etc. Power  
saving shutdown mode reduces the total supply current to  
5µA and allows power supply sequencing. Internal soft-start  
limits the inrush current at start-up.  
Applications  
Distributed Power Systems  
Battery Chargers  
Offline Power Supplies  
Key Specifications  
Telecom Power Supplies  
Wide supply voltage range of 2.97V to 40V  
Automotive Power Systems  
100kHz to 1MHz Adjustable clock frequency  
±2.5% (over temperature) internal reference  
10µA shutdown current (over temperature)  
Typical Application Circuit  
10135501  
Typical High Efficiency Step-Up (Boost) Converter  
© 2009 National Semiconductor Corporation  
101355  
www.national.com  

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