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LM3351 - Switched Capacitor Voltage Converter

General Description

The LM3351 is a CMOS charge-pump voltage converter which efficiently provides a 3.3V to 5V step-up, or 5V to 3.3V step-down.

The LM3351 is pin for pin compatible with the LM3350 but consumes 66% less quiescent current.

Key Features

  • n Conversion of 3.3V to 5V, or 5V to 3.3V n Small Mini SO-8 package n No inductor required.

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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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LM3351 Switched Capacitor Voltage Converter December 1999 LM3351 Switched Capacitor Voltage Converter General Description The LM3351 is a CMOS charge-pump voltage converter which efficiently provides a 3.3V to 5V step-up, or 5V to 3.3V step-down. The LM3351 is pin for pin compatible with the LM3350 but consumes 66% less quiescent current. The LM3351 uses four small, low cost capacitors to provide the voltage conversion. It eliminates the cost, size and radiated EMI related to inductor based circuits, or the power loss of a linear regulator. Operating power conversion efficiency greater than 90% provides ideal performance for battery powered portable systems. The architecture provides a fixed voltage conversion ratio of 3/2 or 2/3. Thus it can be used for other DC-DC conversions as well.