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LM2663 PDF预览

LM2663

更新时间: 2024-11-23 00:01:07
品牌 Logo 应用领域
美国国家半导体 - NSC 转换器开关
页数 文件大小 规格书
12页 286K
描述
Switched Capacitor Voltage Converter

LM2663 数据手册

 浏览型号LM2663的Datasheet PDF文件第2页浏览型号LM2663的Datasheet PDF文件第3页浏览型号LM2663的Datasheet PDF文件第4页浏览型号LM2663的Datasheet PDF文件第5页浏览型号LM2663的Datasheet PDF文件第6页浏览型号LM2663的Datasheet PDF文件第7页 
January 1999  
LM2662/LM2663  
Switched Capacitor Voltage Converter  
General Description  
Features  
n Inverts or doubles input supply voltage  
n Narrow SO-8 Package  
The LM2662/LM2663 CMOS charge-pump voltage con-  
verter inverts a positive voltage in the range of 1.5V to 5.5V  
to the corresponding negative voltage. The LM2662/LM2663  
uses two low cost capacitors to provide 200 mA of output  
current without the cost, size, and EMI related to inductor  
based converters. With an operating current of only 300 µA  
and operating efficiency greater than 90% at most loads, the  
LM2662/LM2663 provides ideal performance for battery  
powered systems. The LM2662/LM2663 may also be used  
as a positive voltage doubler.  
n 3.5typical output resistance  
n 86% typical conversion efficiency at 200 mA  
n (LM2662) selectable oscillator  
frequency: 20 kHz/150 kHz  
n (LM2663) low current shutdown mode  
Applications  
n Laptop computers  
n Cellular phones  
n Medical instruments  
n Operational amplifier power supplies  
n Interface power supplies  
n Handheld instruments  
The oscillator frequency can be lowered by adding an exter-  
nal capacitor to the OSC pin. Also, the OSC pin may be used  
to drive the LM2662/LM2663 with an external clock. For  
LM2662, a frequency control (FC) pin selects the oscillator  
frequency of 20 kHz or 150 kHz. For LM2663, an external  
shutdown (SD) pin replaces the FC pin. The SD pin can be  
used to disable the device and reduce the quiescent current  
to 10 µA. The oscillator frequency for LM2663 is 150 kHz.  
Basic Application Circuits  
Voltage Inverter  
Splitting VIN in Half  
DS100003-1  
Positive Voltage Doubler  
DS100003-3  
DS100003-2  
© 1999 National Semiconductor Corporation  
DS100003  
www.national.com  

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