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LM2662

更新时间: 2024-11-02 12:09:43
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德州仪器 - TI 转换器开关
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19页 1083K
描述
LM2662/LM2663 Switched Capacitor Voltage Converter

LM2662 数据手册

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LM2662, LM2663  
www.ti.com  
SNVS002D JANUARY 1999REVISED MAY 2013  
LM2662/LM2663 Switched Capacitor Voltage Converter  
Check for Samples: LM2662, LM2663  
1
FEATURES  
DESCRIPTION  
The LM2662/LM2663 CMOS charge-pump voltage  
converter 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.  
2
Inverts or Doubles Input Supply Voltage  
8-Pin SOIC Package  
3.5Ω Typical Output Resistance  
86% Typical Conversion Efficiency at 200 mA  
(LM2662) Selectable Oscillator Frequency: 20  
kHz/150 kHz  
(LM2663) Low Current Shutdown Mode  
APPLICATIONS  
Laptop computers  
The oscillator frequency can be lowered by adding an  
external 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.  
Cellular phones  
Medical instruments  
Operational amplifier power supplies  
Interface power supplies  
Handheld instruments  
Basic Application Circuits  
Voltage Inverter  
Positive Voltage Doubler  
Splitting VIN in Half  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
All trademarks are the property of their respective owners.  
2
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 1999–2013, Texas Instruments Incorporated  

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