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