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LM25085AMME PDF预览

LM25085AMME

更新时间: 2024-11-15 05:42:07
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输出元件
页数 文件大小 规格书
24页 500K
描述
42V Constant On-Time PFET Buck Switching Controller with 0.9V Reference

LM25085AMME 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:5.11Is Samacsys:N
其他特性:ALSO HAS ADJUSTABLE OUTPUT VOLTAGE FROM 0.9V模拟集成电路 - 其他类型:SWITCHING CONTROLLER
控制模式:VOLTAGE-MODE最大输入电压:42 V
最小输入电压:4.5 V标称输入电压:24 V
JESD-30 代码:S-PDSO-G8JESD-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
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 (Sn85Pb15)
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

LM25085AMME 数据手册

 浏览型号LM25085AMME的Datasheet PDF文件第2页浏览型号LM25085AMME的Datasheet PDF文件第3页浏览型号LM25085AMME的Datasheet PDF文件第4页浏览型号LM25085AMME的Datasheet PDF文件第5页浏览型号LM25085AMME的Datasheet PDF文件第6页浏览型号LM25085AMME的Datasheet PDF文件第7页 
March 16, 2009  
LM25085A  
42V Constant On-Time PFET Buck Switching Controller  
with 0.9V Reference  
General Description  
Features  
The LM25085A is a functional variant of the LM25085 COT  
PFET Buck Switching Controller. The functional differences  
of the LM25085A are: The feedback reference voltage is  
0.9V, the forced off-time after current limit detection is longer,  
and the soft-start time is shorter (1.8 ms).  
Wide 4.5V to 42V input voltage range  
Adjustable current limit using RDS(ON) or a current sense  
resistor  
Programmable switching frequency to 1MHz  
No loop compensation required  
The LM25085A is a high efficiency PFET switching regulator  
controller that can be used to quickly and easily develop a  
small, efficient buck regulator for a wide range of applications.  
This high voltage controller contains a PFET gate driver and  
a high voltage bias regulator which operates over a wide 4.5V  
to 42V input range. The constant on-time regulation principle  
requires no loop compensation, simplifies circuit implemen-  
tation, and results in ultra-fast load transient response. The  
operating frequency remains nearly constant with line and  
load variations due to the inverse relationship between the  
input voltage and the on-time. The PFET architecture allows  
100% duty cycle operation for a low dropout voltage. Either  
the RDS(ON) of the PFET or an external sense resistor can be  
used to sense current for over-current detection.  
Ultra-Fast transient response  
Nearly constant operating frequency with line and load  
variations  
Adjustable output voltage from 0.9V  
Precision ±2% feedback reference  
Capable of 100% duty cycle operation  
Internal soft-start timer  
Integrated high voltage bias regulator  
Thermal shutdown  
Package  
MSOP-8EP  
MSOP-8  
LLP-8 (3 mm x 3 mm)  
Typical Application, Basic Step Down Controller  
30085201  
© 2009 National Semiconductor Corporation  
300852  
www.national.com  

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