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LM2664 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part No. LM2664
Description  Switched Capacitor Voltage Converter
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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LM2664 Datasheet(HTML) 1 Page - National Semiconductor (TI)

   
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LM2664
Switched Capacitor Voltage Converter
General Description
The LM2664 CMOS charge-pump voltage converter inverts
a positive voltage in the range of +1.8V to +5.5V to the cor-
responding negative voltage of −1.8V to −5.5V. The LM2664
uses two low cost capacitors to provide up to 40 mA of out-
put current.
The LM2664 operates at 160 kHz oscillator frequency to re-
duce output resistance and voltage ripple. With an operating
current of only 220 µA (operating efficiency greater than 91%
with most loads) and 1 µA typical shutdown current, the
LM2664 provides ideal performance for battery powered
systems. The device is in SOT-23-6 package.
Features
n Inverts Input Supply Voltage
n SOT23-6 Package
n 12
Ω Typical Output Impedance
n 91% Typical Conversion Efficiency at 40 mA
n 1µA Typical Shutdown Current
Applications
n Cellular Phones
n Pagers
n PDAs
n Operational Amplifier Power Suppliers
n Interface Power Suppliers
n Handheld Instruments
Basic Application Circuits
Voltage Inverter
DS100031-1
+5V to −10V Converter
DS100031-25
November 1999
© 1999 National Semiconductor Corporation
DS100031
www.national.com


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