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TCM680 - Voltage Converter

General Description

The TCM680 is a dual charge pump, voltage converter that produces output voltages of +2VIN and -2VIN from a single input voltage of +2.0V to +5.5V.

Common applications include ±10V from a single +5V logic supply and ±6V from a +3V lithium battery.

Key Features

  • 99% Voltage Conversion Efficiency.
  • 85% Power Conversion Efficiency.
  • Input Voltage Range: - +2.0V to +5.5V.
  • Only 4 External Capacitors Required.
  • 8-Pin SOIC Package.

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Full PDF Text Transcription (Reference)

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Obsolete Device TCM680 +5V To ±10V Voltage Converter Features • 99% Voltage Conversion Efficiency • 85% Power Conversion Efficiency • Input Voltage Range: - +2.0V to +5.5V • Only 4 External Capacitors Required • 8-Pin SOIC Package Applications • ±10V From +5V Logic Supply • ±6V From a 3V Lithium Cell • Handheld Instruments • Portable Cellular Phones • LCD Display Bias Generator • Panel Meters • Operational Amplifier Power Supplies Typical Operating Circuit +5V C1+ 4.7 µF C2 + 4.7 µF GND C1+ VIN VOUT+ C1- TCM680 C2+ VOUT- C2- GND C4 + 4.7 µF VOUT+ = (2 x VIN) VOUT- = -(2 x VIN) C3 + 4.7 µF GND General Description The TCM680 is a dual charge pump, voltage converter that produces output voltages of +2VIN and -2VIN from a single input voltage of +2.0V to +5.5V.