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LM2681 - Switched Capacitor Voltage Converter

Datasheet Summary

Description

The LM2681 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) is used in this circuit to provide up to 20 mA of output current.

Features

  • 1.
  • 2 Doubles or Splits Input Supply Voltage.
  • SOT-23 6-Lead Package.
  • 15Ω Typical Output Impedance.
  • 90% Typical Conversion Efficiency at 20 mA.

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Datasheet preview – LM2681

Datasheet Details

Part number LM2681
Manufacturer Texas Instruments
File Size 1.10 MB
Description Switched Capacitor Voltage Converter
Datasheet download datasheet LM2681 Datasheet
Additional preview pages of the LM2681 datasheet.

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Full PDF Text Transcription

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LM2681 www.ti.com SNVS042B – MARCH 1999 – REVISED MAY 2013 LM2681 Switched Capacitor Voltage Converter Check for Samples: LM2681 FEATURES 1 •2 Doubles or Splits Input Supply Voltage • SOT-23 6-Lead Package • 15Ω Typical Output Impedance • 90% Typical Conversion Efficiency at 20 mA APPLICATIONS • Cellular Phones • Pagers • PDAs • Operational Amplifier Power Suppliers • Interface Power Suppliers • Handheld Instruments DESCRIPTION The LM2681 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) is used in this circuit to provide up to 20 mA of output current. The LM2681 can also work as a voltage divider to split a voltage in the range of +1.8V to +11V in half.
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