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LM5116-HT PDF预览

LM5116-HT

更新时间： 2024-09-29 12:06:03
品牌 Logo 应用领域
德州仪器 - TI 控制器
页数 文件大小 规格书
34页 636K
描述
WIDE RANGE SYNCHRONOUS BUCK CONTROLLER

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LM5116-HT 数据手册

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LM5116-HT  
www.ti.com  
SLVSBS8A –OCTOBER 2013–REVISED OCTOBER 2013  
WIDE RANGE SYNCHRONOUS BUCK CONTROLLER  
Check for Samples: LM5116-HT  
1
FEATURES  
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Emulated Peak Current Mode  
SUPPORTS EXTREME TEMPERATURE  
APPLICATIONS  
Wide Operating Range Up to 80 V  
Low IQ Shutdown (< 10 µA)  
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Controlled Baseline  
One Assembly and Test Site  
One Fabrication Site  
Drives Standard or Logic Level MOSFETs  
Robust 3.5-A Peak Gate Drive  
Available in Extreme (–55°C to 175°C)  
Temperature Range  
Free-Run or Synchronous Operation to 1 MHz  
Optional Diode Emulation Mode  
Programmable Output from 1.215 V to 80 V  
Precision 1.5% Voltage Reference  
Programmable Current Limit  
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Extended Product Life Cycle  
Extended Product-Change Notification  
Product Traceability  
Texas Instruments' high temperature products  
utilize highly optimized silicon (die) solutions  
with design and process enhancements to  
maximize performance over extended  
temperatures.  
Programmable Soft-Start  
Programmable Line Under-Voltage Lockout  
Automatic Switch to External Bias Supply  
APPLICATIONS  
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Down-Hole Drilling  
High Temperature Environments  
DESCRIPTION  
The LM5116 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 1 MHz. The LM5116 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 low quiescent current shutdown  
disables the controller and consumes less than 10 µA of total input current. Additional features include a high  
voltage bias regulator, automatic switch-over to external bias for improved efficiency, thermal shutdown,  
frequency synchronization, cycle by cycle 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 © 2013, Texas Instruments Incorporated  
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