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LM25116MHX PDF预览

LM25116MHX

更新时间： 2024-11-15 04:44:39
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
26页 606K
描述
Wide Range Synchronous Buck Controller

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中文翻译

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LM25116MHX 技术参数

是否Rohs认证：不符合生命周期：Transferred
包装说明：TSSOP-20Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.21Is Samacsys：N
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：42 V
最小输入电压：6 V标称输入电压：24 V
JESD-30 代码：R-PDSO-G20JESD-609代码：e0
长度：6.5 mm湿度敏感等级：1
功能数量：1端子数量：20
最高工作温度：125 °C最低工作温度：-40 °C
最大输出电流：3.5 A封装主体材料：PLASTIC/EPOXY
封装代码：HTSSOP封装等效代码：TSSOP20,.25
封装形状：RECTANGULAR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：1.1 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：590 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：4.4 mm
Base Number Matches：1

LM25116MHX 数据手册

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April 2007  
LM25116  
Wide Range Synchronous Buck Controller  
General Description  
Features  
The LM25116 is a synchronous buck controller intended for  
step-down regulator applications from a high voltage or widely  
varying input supply. The control method is based upon cur-  
rent mode control utilizing an emulated current ramp. Current  
mode control provides inherent line feed-forward, cycle by  
cycle current limiting and ease of loop compensation. The use  
of an emulated control ramp reduces noise sensitivity of the  
pulse-width modulation circuit, allowing reliable control of  
very small duty cycles necessary in high input voltage appli-  
cations. The operating frequency is programmable from  
50kHz to 1MHz. The LM25116 drives external high-side and  
low-side NMOS power switches with adaptive dead-time con-  
trol. A user-selectable diode emulation mode enables discon-  
tinuous mode operation for improved efficiency at light load  
conditions. A low quiescent current shutdown disables the  
controller and consumes less than 10µA of total input current.  
Additional features include a high voltage bias regulator, au-  
tomatic switch-over to external bias for improved efficiency,  
thermal shutdown, frequency synchronization, cycle by cycle  
current limit and adjustable line under-voltage lockout. The  
device is available in a power enhanced TSSOP-20 package  
featuring an exposed die attach pad to aid thermal dissipation.  
Emulated peak current mode  
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Wide operating range up to 42V  
Low IQ shutdown (<10µA)  
Drives standard or logic level MOSFETs  
Robust 3.5A peak gate drive  
Free-run or synchronous operation to 1MHz  
Optional diode emulation mode  
Programmable output from 1.215V to 36V  
Precision 1.5% voltage reference  
Programmable current limit  
Programmable soft-start  
Programmable line under-voltage lockout  
Automatic switch to external bias supply  
TSSOP-20EP exposed pad  
Thermal shutdown  
■
Typical Application  
30015601  
© 2007 National Semiconductor Corporation  
300156  
www.national.com  
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