Pololu.com just introduced a tiny new Step-Up / Step-Down voltage regulator.
- Output voltage 2.5 – 8 V
- Input voltage 2.7 – 11.8 V
- Output current 500 mA to 1000mA
- 3 x 11 × 17 mm
This will work very well in low-powered devices where you want to every bit of power a battery can offer. It is also well suited for energy harvesting where you get fluctuations in power harvesting. (Solar and Wind comes to mind)