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LM2687

Part Number	LM2687
Manufacturer	National Semiconductor
Description	Low Noise Regulated Switched Capacitor Voltage
Published	Mar 22, 2005
Detailed Description	LM2687 Low Noise Regulated Switched Capacitor Voltage Inverter August 1999 LM2687 Low Noise Regulated Switched Capacit...
Datasheet	LM2687 PDF File

Overview

LM2687 Low Noise Regulated Switched Capacitor Voltage Inverter August 1999 LM2687 Low Noise Regulated Switched Capacitor Voltage Inverter General Description The LM2687 CMOS Negative Regulated Switched Capacitor Voltage Inverter delivers a very low noise adjustable output for an input voltage in the range of +2.
7V to +5.
5V.
Four low cost capacitors are used in this circuit to provide up to 10mA of output current.
The regulated output for the LM2687 is adjustable between −1.
5V and −5.
2V.
The LM2687 operates at 100 kHz (typical) switching frequency to reduce output resistance and voltage ripple.
With an operating current of only 500 µA (charge pump power efficiency greater than 90% with most...

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