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LM828 - Switched Capacitor Voltage Converter

General Description

The LM828 CMOS charge-pump voltage converter inverts a positive voltage in the range of +1.8V to +5.5V to the corresponding negative voltage of 1.8V to

5.5V.

The LM828 uses two low cost capacitors to provide up to 25 mA of output current.

Key Features

  • 1.
  • 2 Inverts Input Supply Voltage.
  • SOT-23 Package.
  • 20Ω Typical Output Impedance.
  • 97% Typical Conversion Efficiency at 5 mA.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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LM828 www.ti.com SNOS035D – MARCH 2010 – REVISED MAY 2013 LM828 Switched Capacitor Voltage Converter Check for Samples: LM828 FEATURES 1 •2 Inverts Input Supply Voltage • SOT-23 Package • 20Ω Typical Output Impedance • 97% Typical Conversion Efficiency at 5 mA APPLICATIONS • Cellular Phones • Pagers • PDAs • Operational Amplifier Power Supplies • Interface Power Supplies • Handheld Instruments DESCRIPTION The LM828 CMOS charge-pump voltage converter inverts a positive voltage in the range of +1.8V to +5.5V to the corresponding negative voltage of −1.8V to −5.5V. The LM828 uses two low cost capacitors to provide up to 25 mA of output current. The LM828 operates at 12 kHz switching frequency to reduce output resistance and voltage ripple.