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.