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LM5009A

更新时间： 2024-11-23 05:42:23
品牌 Logo 应用领域
美国国家半导体 - NSC 稳压器开关
页数 文件大小 规格书
16页 387K
描述
100V, 150 mA Constant On-Time Buck Switching Regulator

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LM5009A 数据手册

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June 26, 2009  
LM5009A  
100V, 150 mA Constant On-Time Buck Switching Regulator  
General Description  
Features  
The LM5009A is a functional variant of the LM5009 COT Buck  
Switching Regulator. The functional differences of the  
LM5009A are: The minimum input operating voltage is 6 volts,  
the on-time equation is slightly different, and the requirement  
for a minimum load current is removed.  
Operating input voltage range: 6V to 95V  
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Integrated 100V, N-Channel buck switch  
Internal start-up regulator  
No loop compensation required  
Ultra-Fast transient response  
The LM5009A Step Down Switching Regulator features all of  
the functions needed to implement a low cost, efficient, Buck  
bias regulator. This high voltage regulator contains an 100 V  
N-Channel Buck Switch. The device is easy to implement and  
is provided in the MSOP-8 and the thermally enhanced LLP-8  
packages. The regulator is based on a control scheme using  
an ON time inversely proportional to VIN. This feature allows  
the operating frequency to remain relatively constant. The  
control scheme requires no loop compensation. An intelligent  
current limit is implemented with forced OFF time, which is  
inversely proportional to Vout. This scheme ensures short  
circuit control while providing minimum foldback. Other fea-  
tures include: Thermal Shutdown, VCC under-voltage lockout,  
Gate drive under-voltage lockout, Max Duty Cycle limiter, and  
a pre-charge switch.  
On time varies inversely with input voltage  
Operating frequency remains constant with varying line  
voltage and load current  
Adjustable output voltage from 2.5V  
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Highly efficient operation  
Precision internal reference  
Low bias current  
Intelligent current limit  
Thermal shutdown  
Typical Applications  
Non-Isolated Telecommunication Buck Regulator  
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Secondary High Voltage Post Regulator  
+42V Automotive Systems  
Package  
MSOP - 8  
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LLP - 8 (4mm x 4mm)  
Typical Application, Basic Step-Down Regulator  
30087101  
© 2009 National Semiconductor Corporation  
300871  
www.national.com  
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LM5009ASD/NOPB TI

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LM5009ASDX NSC

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 		100V, 150 mA Constant On-Time Buck Switching Regulator
LM5009ASDX/NOPB TI

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 		6V 至 95V 宽输入电压、150mA 恒定导通时间非同步降压稳压器 | NGU | 8
LM5009MM NSC

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LM5009MM TI

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