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LM2767 - Switched Capacitor Voltage Converter

Description

The LM2767 CMOS charge-pump voltage converter operates as a voltage doubler for an input voltage in the range of +1.8V to +5.5V.

Two low cost capacitors and a diode are used in this circuit to provide at least 15 mA of output current.

Features

  • n n n n Doubles Input Supply Voltage SOT23-5 Package 20Ω Typical Output Impedance 96% Typical Conversion Efficiency at 15mA.

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Full PDF Text Transcription

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LM2767 Switched Capacitor Voltage Converter February 2000 LM2767 Switched Capacitor Voltage Converter General Description The LM2767 CMOS charge-pump voltage converter operates as a voltage doubler for an input voltage in the range of +1.8V to +5.5V. 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 SOT23-5 package.
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