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LM2662MX/NOPB 参数 Datasheet PDF下载

LM2662MX/NOPB图片预览
型号: LM2662MX/NOPB
PDF下载: 下载PDF文件 查看货源
内容描述: [200mA switched capacitor voltage converter 8-SOIC -40 to 85]
分类和应用: 转换器开关
文件页数/大小: 19 页 / 1083 K
品牌: TI [ TEXAS INSTRUMENTS ]
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LM2662, LM2663  
SNVS002D JANUARY 1999REVISED MAY 2013  
www.ti.com  
REGULATING Vout  
It is possible to regulate the output of the LM2662/LM2663 by use of a low dropout regulator (such as LP2986).  
The whole converter is depicted in Figure 24. This converter can give a regulated output from 1.5V to 5.5V by  
choosing the proper resistor ratio:  
(6)  
where, Vref = 1.23V  
The error flag on pin 7 of the LP2986 goes low when the regulated output at pin 5 drops by about 5% below  
nominal. The LP2986 can be shutdown by taking pin 8 low. The less than 1 μA quiescent current in the  
shutdown mode is favorable for battery powered applications.  
Figure 24. Combining LM2662/LM2663 with LP2986 to Make a Negative Adjustable Regulator  
Also, as shown in Figure 25 by operating the LM2662/LM2663 in voltage doubling mode and adding a low  
dropout regulator (such as LP2986) at the output, we can get +5V output from an input as low as +3.3V.  
Figure 25. Generating +5V from +3.3V Input Voltage  
12  
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Copyright © 1999–2013, Texas Instruments Incorporated  
Product Folder Links: LM2662 LM2663