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LM25085AMY PDF预览

LM25085AMY

更新时间: 2024-10-01 05:42:07
品牌 Logo 应用领域
美国国家半导体 - NSC 开关控制器
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

LM25085AMY 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:5.11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 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封装主体材料:PLASTIC/EPOXY
封装代码:HTSSOP封装等效代码:TSSOP8,.19
封装形状:SQUARE封装形式:SMALL OUTLINE, HEAT SINK/SLUG, 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 mm
Base Number Matches:1

LM25085AMY 数据手册

 浏览型号LM25085AMY的Datasheet PDF文件第2页浏览型号LM25085AMY的Datasheet PDF文件第3页浏览型号LM25085AMY的Datasheet PDF文件第4页浏览型号LM25085AMY的Datasheet PDF文件第5页浏览型号LM25085AMY的Datasheet PDF文件第6页浏览型号LM25085AMY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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