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A Multi-Mode Selectable DC-DC Converter for Ultralow Power Circuits

This project by Ernie Bowden and Doug Sorenson presents a Multi-Mode Selectable DC-DC Converter designed for ultralow power applications. It addresses the quantization effect associated with multiple voltage sources using dithering techniques. The converter demonstrates the capability to operate with an infinite range of output values, optimizing energy efficiency. The design leverages switched capacitor concepts, focusing on regulators, selection logic, and the impact of load current on output voltage. This work also references previous research on embedded power supplies for low-power DSP applications.

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A Multi-Mode Selectable DC-DC Converter for Ultralow Power Circuits

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  1. A Multi-Mode Selectable DC-DC Converter for Ultralow Power Circuits Ernie Bowden Doug Sorenson

  2. Project Motivation Quantization effect. Dashed line represents four voltage sources with dithering. Lowest energy line is a voltage supply with infinite output values [1] V. Gutnik and A. Chandrakasan, “Embedded Power Supply for Low-Power DSP”, IEEE Transactions on Very Large Scale Integration (VLSI) Systems, December 1997, Vol. 5, No. 4, pp 425-436

  3. Switched Capacitor Concept

  4. Switched Capacitor Design

  5. Linear Regulator Design

  6. Selection Logic

  7. Voltage Curves

  8. Effects of Load Current on Output Voltage

  9. Switched Capacitor Efficiencies in 65nm PTM

  10. Questions?

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