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LM25117QPMHX PDF预览

LM25117QPMHX

更新时间： 2024-11-15 12:21:39
品牌 Logo 应用领域
德州仪器 - TI 监控控制器
页数 文件大小 规格书
33页 703K
描述
Wide Input Range Synchronous Buck Controller with Analog Current Monitor

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中文翻译

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LM25117QPMHX 技术参数

生命周期：Obsolete零件包装代码：TSSOP
包装说明：HTSSOP,针数：20
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.68
其他特性：ALSO HAS OUTPUT VOLTAGE UP TO 0.8V, HGT NOM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：4.5 V
标称输入电压：24 VJESD-30 代码：R-PDSO-G20
长度：6.5 mm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标称输出电压：7.6 V
封装主体材料：PLASTIC/EPOXY封装代码：HTSSOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
座面最大高度：1.1 mm表面贴装：YES
切换器配置：PUSH-PULL最大切换频率：530 kHz
温度等级：AUTOMOTIVE端子形式：GULL WING
端子节距：0.65 mm端子位置：DUAL
宽度：4.4 mmBase Number Matches：1

LM25117QPMHX 数据手册

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April 10, 2012  
LM25117/LM25117Q  
Wide Input Range Synchronous Buck Controller with  
Analog Current Monitor  
General Description  
Features  
The LM25117 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.  
LM25117Q is an Automotive Grade product that is AEC-  
■
Q100 grade 1 qualified (-40°C to +125°C operating  
junction temperature)  
Emulated peak current mode control  
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Wide operating range from 4.5V to 42V  
Robust 3.3A peak gate drives  
Adaptive dead-time output driver control  
Free-run or synchronizable clock up to 750kHz  
Optional diode emulation mode  
The operating frequency is programmable from 50 kHz to 750  
kHz. The LM25117 drives external high-side and low-side  
NMOS power switches with adaptive dead-time control. A us-  
er-selectable diode emulation mode enables discontinuous  
mode operation for improved efficiency at light load condi-  
tions. A high voltage bias regulator that allows external bias  
supply further improves efficiency. The LM25117’s unique  
analog telemetry feature provides average output current in-  
formation. Additional features include thermal shutdown, fre-  
quency synchronization, hiccup mode current limit and  
adjustable line under-voltage lockout.  
Programmable output from 0.8V  
Precision 1.5% voltage reference  
Analog current monitor  
Programmable current limit  
Hiccup mode over current protection  
Programmable soft-start and tracking  
Programmable line under-voltage lockout  
Programmable switch-over to external bias supply  
Thermal shutdown  
Packages  
TSSOP-20EP (Thermally enhanced)  
■
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LLP-24 (4mmx4mm)  
Typical Application  
30155001  
© 2012 Texas Instruments Incorporated  
301550 SNVS714D  
www.ti.com  
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