LM2687 Datasheet (National Semiconductor) - Low Noise Regulated Switched Capacitor Voltage

LM2687, Low Noise Regulated Switched Capacitor Voltage

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 ad

LM2687 Features

* n n n n n Inverts and regulates the input supply voltage Small MSOP-8 package 91% typical charge pump power efficiency at 10mA Low output ripple (1mV typical) Shutdown lowers Quiescent current to 0.05 µA (typical) Applications n n n n n Wireless Communication Systems Cellular Phone Power Amplifier