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LM2681

National Semiconductor
Part Number LM2681
Manufacturer National Semiconductor
Description Switched Capacitor Voltage Converter
Published Mar 22, 2005
Detailed Description LM2681 Switched Capacitor Voltage Converter March 1999 LM2681 Switched Capacitor Voltage Converter General Description...
Datasheet PDF File LM2681 PDF File

LM2681
LM2681


Overview
LM2681 Switched Capacitor Voltage Converter March 1999 LM2681 Switched Capacitor Voltage Converter General Description The LM2681 CMOS charge-pump voltage converter operates as a voltage doubler for an input voltage in the range of +2.
5V to +5.
5V.
Two low cost capacitors and a diode (needed during start-up) is used in this circuit to provide up to 20 mA of output current.
The LM2681 can also work as a voltage divider to split a voltage in the range of +1.
8V to +11V in half.
The LM2681 operates at 160 kHz oscillator frequency to reduce output resistance and voltage ripple.
With an operating current of only 550 µA (operating efficiency greater than 90% with most loads) the LM2681 provides id...



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