1 Features

1• Doubles Input Supply Voltage

• SOT-23 6-Pin Package

• 20-Ω Typical Output Impedance

• 90% Typical Conversion Efficiency at 20 mA

• 0.1-μA Typical Shutdown Current

2 Applications

• Cellular Phones

• Pagers

• PDAs

• Operational Amplifier Power Supplies

• Interface Power Supplies

• Handheld Instruments

3 Description

The LM2765 CMOS charge-pump voltage converter

operates as a voltage doubler for an input voltage in

the range of 1.8 V to 5.5 V. Two low-cost capacitors

and a diode are used in this circuit to provide up to 20

mA of output current.

The LM2765 operates at 50-kHz switching frequency

to reduce output resistance and voltage ripple. With

an operating current of only 130 μA (operating

efficiency greater than 90% with most loads) and 0.1-

μA typical shutdown current, the LM2765 provides

ideal performance for battery powered systems. The

device is manufactured in a 6-pin SOT-23 package.