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LM2717 PDF预览

LM2717

更新时间: 2024-10-26 22:51:55
品牌 Logo 应用领域
美国国家半导体 - NSC 转换器
页数 文件大小 规格书
12页 672K
描述
Dual Step-down DC/DC Converter

LM2717 数据手册

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PRELIMINARY  
May 2005  
LM2717  
Dual Step-down DC/DC Converter  
General Description  
Features  
n Fixed 3.3V output buck converter with a 2.2A, 0.16,  
internal switch  
The LM2717 is composed of two PWM DC/DC buck (step-  
down) converters. The first converter is used to generate a  
fixed output voltage of 3.3V. The second converter is used to  
generate an adjustable output voltage. Both converters fea-  
ture low RDSON (0.16) internal switches for maximum effi-  
ciency. Operating frequency can be adjusted anywhere be-  
tween 300kHz and 600kHz allowing the use of small external  
components. External soft-start pins for each enables the  
user to tailor the soft-start times to a specific application.  
Each converter may also be shut down independently with  
its own shutdown pin. The LM2717 is available in a low  
profile 24-lead TSSOP package ensuring a low profile over-  
all solution.  
n Adjustable buck converter with a 3.2A, 0.16, internal  
switch  
n Operating input voltage range of 4V to 20V  
n Input undervoltage protection  
n 300kHz to 600kHz pin adjustable operating frequency  
n Over temperature protection  
n Small 24-Lead TSSOP package  
Applications  
n TFT-LCD Displays  
n Handheld Devices  
n Portable Applications  
n Laptop Computers  
Typical Application Circuit  
20078501  
© 2005 National Semiconductor Corporation  
DS200785  
www.national.com  

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