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LM2780

National Semiconductor
Part Number LM2780
Manufacturer National Semiconductor
Description Ultra-Low Ripple Switched Capacitor Voltage Inverter
Published Apr 22, 2010
Detailed Description March 2003 LM2780 Ultra-Low Ripple Switched Capacitor Voltage Inverter LM2780 Ultra-Low Ripple Swi...
Datasheet PDF File LM2780 PDF File

LM2780
LM2780

Overview
March 2003 LM2780 Ultra-Low Ripple Switched Capacitor Voltage Inverter LM2780 Ultra-Low Ripple Switched Capacitor Voltage Inverter General Description The LM2780 is a charge pump that inverts an input voltage in the range of 1.
8V to 5.
5V to the corresponding output voltage of -1.
8V to -5.
5V.
With use of three or four low-cost external ceramic capacitors, the LM2780 can provide up to 50mA of output current.
The LM2780 operates at a 12kHz typical switching frequency to minimize supply current (60µA typ.
).
Two charge pumps operate 180˚ out of phase to significantly reduce the output voltage ripple compared to that of traditional singlephase charge pump circuits.
If larger ...


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