LTC3108 Ultra Low Voltage Step Up Converter (Input from 20 mV)
This powerful boost regulator efficiently boosts input voltages as low as 2.9 V to a higher, adjustable output voltage between 9 V and 30 V while allowing an input current as high as 5 A.
DC-DC Boost Module with USB Input, display and adjustable voltage
This compact (0.45″×0.6″) U1V11A switching step-up (or boost) voltage regulator efficiently boosts input voltages as low as 0.5 V to an adjustable output voltage between 2 V and 5.25 V. Unlike most boost regulators, the U1V11A offers a true shutdown option that turns off power to the load, and it automatically switches to a linear down-regulation mode...
M411 Adjustable Step-up DC-DC Power Supply Module (5 - 45 V, 5 A)