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LM2776 - Switched Capacitor Inverter

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General Description

The LM2776 CMOS charge-pump voltage converter inverts a positive voltage in the range from 2.7 V to 5.5 V to the corresponding negative voltage.

The LM2776 uses three low-cost capacitors to provide 200 mA of output current without the cost, size, and electromagnetic interference (EMI) related to inductor-based converters.

With an operating current of only 100 μA and operating efficiency greater than 90% at most loads, the LM2776 provides ideal performance for batterypowered systems requiring a high power negative power supply.

Overview

Product Folder Order Now Technical Documents Tools & Software Support & Community Reference Design LM2776 SNVSA56B – MAY 2015 – REVISED FEBRUARY 2017 LM2776 Switched Capacitor Inverter.

Key Features

  • 1 Input Voltage: 2.7 V to 5.5 V.
  • 200-mA Output Current.
  • Inverts Input Supply Voltage.
  • Low-Current PFM Mode Operation.
  • 2-MHz Switching Frequency.
  • Greater than 90% Efficiency.
  • Current Limit and Thermal Protection.
  • No Inductors 2.

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