Adafruit TPS61023 MiniBoost 5V 1A Boost Converter Breakout
Adafruit TPS61169 Constant Current LED Boost Converter Breakout
Adafruit PowerBoost 1000 Basic - 5V USB 1A Boost from 1.8V+
Adafruit TPS61040 12V Bias Voltage Boost Converter Breakout
Adafruit TPS65131 Split Rail Boost Converter - +6 to -15V and -6 to -15V