LM2665 Datasheet PDF - National

General Description

●The LM2665 CMOS charge-pump voltage converter operates as a voltage doubler for an input voltage in the range of +2.5V to +5.5V. Two low cost capacitors and a diode (needed during start-up) are used in this circuit to provide up to 40 mA of output current. The LM2665 can also work as a voltage divider to split a voltage in the range of +1.8V to +11V in half.

●The LM2665 operates at 160 kHz oscillator frequency to reduce output resistance and voltage ripple. With an operating current of only 650 µA (operating efficiency greater than 90% with most loads) and 1µA typical shutdown current, the LM2665 provides ideal performance for battery powered systems. The device is in SOT-23-6 package.

●Features

●■ Doubles or Splits Input Supply Voltage

●■ SOT23-6 Package

●■ 12Ω Typical Output Impedance

●■ 90% Typical Conversion Efficiency at 40 mA

●■ 1µA Typical Shutdown Current

●Applications

●■ Cellular Phones

●■ Pagers

●■ PDAs

●■ Operational Amplifier Power Suppliers

●■ Interface Power Suppliers

●■ Handheld Instruments