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?