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LM2731

更新时间: 2024-10-27 22:51:55
品牌 Logo 应用领域
美国国家半导体 - NSC 转换器开关升压转换器
页数 文件大小 规格书
16页 525K
描述
0.6/1.6 MHz Boost Converters With 22V Internal FET Switch in SOT-23

LM2731 数据手册

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July 2003  
LM2731  
0.6/1.6 MHz Boost Converters With 22V Internal FET  
Switch in SOT-23  
General Description  
The LM2731 switching regulators are current-mode boost  
converters operating at fixed frequencies of 1.6 MHz (“X”  
option) and 600 kHz (“Y” option).  
Features  
n 22V DMOS FET switch  
n 1.6 MHz (“X”), 0.6 MHz (“Y”) switching frequency  
n Low RDS(ON) DMOS FET  
The use of SOT-23 package, made possible by the minimal  
power loss of the internal 1.8A switch, and use of small  
inductors and capacitors result in the industry’s highest  
power density. The 22V internal switch makes these solu-  
tions perfect for boosting to voltages up to 20V.  
n Switch current up to 1.8A  
n Wide input voltage range (2.7V–14V)  
<
n Low shutdown current ( 1 µA)  
n 5-Lead SOT-23 package  
n Uses tiny capacitors and inductors  
n Cycle-by-cycle current limiting  
n Internally compensated  
These parts have a logic-level shutdown pin that can be  
used to reduce quiescent current and extend battery life.  
Protection is provided through cycle-by-cycle current limiting  
and thermal shutdown. Internal compensation simplifies de-  
sign and reduces component count.  
Applications  
n White LED Current Source  
n PDA’s and Palm-Top Computers  
n Digital Cameras  
Switch Frequency  
X
Y
n Portable Phones and Games  
n Local Boost Regulator  
1.6 MHz  
0.6 MHz  
Typical Application Circuit  
20059110  
20059130  
© 2003 National Semiconductor Corporation  
DS200591  
www.national.com  

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