Pololu Adjustable 4-12V Step-Up Voltage Regulator U3V50ALV

These adjustable boost (step-up) voltage regulators generate higher output voltages from input voltages as low as 2.9 V. They are switching regulators (also called switched-mode power supplies (SMPS) or DC-to-DC converters) and have a typical efficiency between 80% to 95%. The available output current is a function of the input voltage, output voltage, and efficiency (see images), but the input current can typically be as high as 5 A.