1 Features

• Doubles input supply voltage

• SOT-23 5-pin package

• 20-Ω typical output impedance

• 96% typical conversion efficiency at 15 mA

2 Applications

• Cellular phones

• Pagers

• PDAs, organizers

• Operational amplifier power suppliers

• Interface power suppliers

• Handheld instruments

3 Description

The LM2767 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 at least

15 mA of output current.

The LM2767 operates at 11-kHz switching frequency

to avoid audio voice-band interference. With an

operating current of only 40 μA (operating efficiency

greater than 90% with most loads), the LM2767

provides ideal performance for battery-powered

systems. The device is manufactured in a 5-pin

SOT-23 package.