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LM3485MMX PDF预览

LM3485MMX

更新时间: 2024-11-22 22:51:55
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
15页 372K
描述
Hysteretic PFET Buck Controller

LM3485MMX 技术参数

是否Rohs认证: 不符合生命周期:Transferred
包装说明:PLASTIC, MSOP-8Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.15Is Samacsys:N
其他特性:ALSO OPERATES IN ADJUSTABLE MODE FROM 1.239 V TO 35 V; ALSO OPERATES IN PWM CONTROL TECHNIQUE模拟集成电路 - 其他类型:SWITCHING CONTROLLER
控制模式:CURRENT-MODE控制技术:HYSTERETIC CURRENT MODE
最大输入电压:35 V最小输入电压:4.5 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:0.1 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峰值回流温度(摄氏度):260
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 (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:40
宽度:3 mmBase Number Matches:1

LM3485MMX 数据手册

 浏览型号LM3485MMX的Datasheet PDF文件第2页浏览型号LM3485MMX的Datasheet PDF文件第3页浏览型号LM3485MMX的Datasheet PDF文件第4页浏览型号LM3485MMX的Datasheet PDF文件第5页浏览型号LM3485MMX的Datasheet PDF文件第6页浏览型号LM3485MMX的Datasheet PDF文件第7页 
May 2002  
LM3485  
Hysteretic PFET Buck Controller  
n 4.5V to 35V wide input range  
n 1.242V to VIN adjustable output range  
n High Efficiency 93%  
General Description  
The LM3485 is a high efficiency PFET switching regulator  
controller that a system designer can use to quickly and  
easily develop a small, low cost, switching buck regulator for  
a wide range of applications. The use of a hysteretic control  
scheme provides for simple design without any control loop  
stability concerns using a wide variety of external compo-  
nents. The PFET architecture also allows for low component  
count as well as ultra-low dropout operation. Another benefit  
is high efficiency operation at light loads without an increase  
in output ripple. Current limit protection circuit is provided by  
measuring the voltage across the PFET’s RDSON thus elimi-  
nating a costly sense resistor. The current limit can be ad-  
justed allowing for designs at various output currents and  
costs.  
±
±
n
1.3% ( 2% over temp) internal reference  
n 100% duty cycle  
>
n Maximum operating frequency 1MHz  
n Current limit protection  
n MSOP-8  
Applications  
n Set-Top Box  
n DSL/Cable Modem  
n PC/IA  
n Auto PC  
n TFT Monitor  
n Battery Powered Portable Applications  
n Distributed Power Systems  
n Always On Power  
Features  
n Easy to use control methodology  
n No control loop compensation required  
Typical Application Circuit  
20034608  
© 2002 National Semiconductor Corporation  
DS200346  
www.national.com  

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