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LM5018

更新时间： 2024-11-14 12:21:43
品牌 Logo 应用领域
德州仪器 - TI 稳压器
页数 文件大小 规格书
17页 414K
描述
100V, 300mA Constant On-Time Synchronous Buck Regulator

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LM5018 数据手册

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February 9, 2012  
LM5018  
100V, 300mA Constant On-Time Synchronous Buck  
Regulator  
General Description  
Features  
The LM5018 is a 100V, 300mA synchronous step-down reg-  
ulator with integrated high side and low side MOSFETs. The  
constant-on-time (COT) control scheme employed in the  
LM5018 requires no loop compensation, provides excellent  
transient response, and enables very low step-down ratios.  
The on-time varies inversely with the input voltage resulting  
in nearly constant frequency over the input voltage range. A  
high voltage startup regulator provides bias power for internal  
operation of the IC and for integrated gate drivers.  
Wide 9V to 100V Input Range  
■
■
■
■
■
■
■
■
■
■
■
■
Integrated 100V, High and Low Side Switches  
No Schottky Required  
Constant On-time Control  
No Loop Compensation Required  
Ultra-Fast Transient Response  
Nearly Constant Operating Frequency  
Intelligent Peak Current Limit  
A peak current limit circuit protects against overload condi-  
tions. The undervoltage lockout (UVLO) circuit allows the  
input undervoltage threshold and hysteresis to be indepen-  
dently programmed. Other protection features include ther-  
mal shutdown and bias supply undervoltage lockout.  
Adjustable Output Voltage from 1.225V  
Precision 2% Feedback Reference  
Frequency Adjustable to 1MHz  
Adjustable Undervoltage Lockout  
The LM5018 is available in LLP-8 and PSOP-8 plastic pack-  
ages.  
Remote Shutdown  
■
Thermal Shutdown  
■
Packages  
LLP-8  
■
■
PSOP-8  
Applications  
Smart Power Meters  
■
■
■
■
Telecommunication Systems  
Automotive Electronics  
Isolated Bias Supply  
Typical Application  
30181601  
FIGURE 1.  
© 2012 Texas Instruments Incorporated  
301816 SNVS787B  
www.ti.com  
1234567...17

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LM5018 替代型号

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