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Datasheet > 电源电路 > 开关式稳压器或控制器> LM25117PSQ/NOPB
LM25117PSQ/NOPB PDF预览

LM25117PSQ/NOPB

更新时间： 2024-11-15 12:00:19
品牌 Logo 应用领域
德州仪器 - TI 稳压器开关式稳压器或控制器电源电路开关式控制器输出元件监控
页数 文件大小 规格书
43页 1872K
描述
Wide Input Range Synchronous Buck Controller with Analog Current Monitor

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中文翻译

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LM25117PSQ/NOPB 技术参数

是否无铅：不含铅是否Rohs认证：符合
生命周期：Active包装说明：WQFN-24
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：1 week
风险等级：1.64Is Samacsys：N
其他特性：PROGRAMMABLE OUTPUT FROM 0.8V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：S-XQCC-N24
JESD-609代码：e3长度：4 mm
湿度敏感等级：1功能数量：1
端子数量：24最高工作温度：125 °C
最低工作温度：-40 °C最大输出电流：20 A
最大输出电压：41 V最小输出电压：0.8 V
封装主体材料：UNSPECIFIED封装代码：HVQCCN
封装等效代码：LCC24,.16SQ,20封装形状：SQUARE
封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度（摄氏度）：260
认证状态：Not Qualified座面最大高度：0.8 mm
子类别：Switching Regulator or Controllers表面贴装：YES
切换器配置：BUCK最大切换频率：750 kHz
温度等级：AUTOMOTIVE端子面层：Matte Tin (Sn)
端子形式：NO LEAD端子节距：0.5 mm
端子位置：QUAD处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：4 mmBase Number Matches：1

LM25117PSQ/NOPB 数据手册

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LM25117  
LM25117-Q1  
www.ti.com  
SNVS714D –APRIL 2011–REVISED APRIL 2012  
Wide Input Range Synchronous Buck Controller with Analog Current Monitor  
Check for Samples: LM25117, LM25117-Q1  
1
FEATURES  
2
•
LM25117Q is an Automotive Grade product  
that is AEC-Q100 grade 1 qualified (-40°C to  
+125°C operating junction temperature)  
•
•
•
•
•
•
•
Precision 1.5% voltage reference  
Analog current monitor  
Programmable current limit  
•
•
•
•
•
•
•
Emulated peak current mode control  
Wide operating range from 4.5V to 42V  
Robust 3.3A peak gate drives  
Hiccup mode over current protection  
Programmable soft-start and tracking  
Programmable line under-voltage lockout  
Adaptive dead-time output driver control  
Free-run or synchronizable clock up to 750kHz  
Optional diode emulation mode  
Programmable switch-over to external bias  
supply  
•
Thermal shutdown  
Programmable output from 0.8V  
DESCRIPTION  
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 current 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 applications.  
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 user-selectable diode emulation mode  
enables discontinuous mode operation for improved efficiency at light load conditions. A high voltage bias  
regulator that allows external bias supply further improves efficiency. The LM25117’s unique analog telemetry  
feature provides average output current information. Additional features include thermal shutdown, frequency  
synchronization, hiccup mode current limit and adjustable line under-voltage lockout.  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
2
All trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2011–2012, Texas Instruments Incorporated  
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LM25117PSQ/NOPB 替代型号

型号 品牌 替代类型 描述 数据表
LM25117PSQE/NOPB TI

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