The compact (0.32″×0.515″) U3V12F12 switching step-up (or boost) voltage regulator takes an input voltage as low as 2.5 V and efficiently boosts it to 12 V. The pins have a 0.1″ spacing, making this board compatible with standard solderless breadboards and perfboards.
The SHDN pin can be driven low (under 0.3 V) to turn off the output and put the board into a low-power state that typically draws 20 μA, and it can be driven high (above 2.3 V) to enable the board. If you do not need to use the shutdown feature, the SHDN pin can be directly connected to VIN to permanently enable the board. You should not leave this pin disconnected as this can result in unpredictable behavior.
These voltage regulators generate higher output voltages from input voltages as low as 2.5 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 90%. The available output current is a function of the input voltage, output voltage, and efficiency (see Typical Efficiency and Output Current chart), but the input current can typically be as high as 1.4 A.
This regulator’s thermal shutdown prevents damage from overheating, but it does not have short-circuit or reverse-polarity protection!
input voltage: 2.5 V – VOUT
12 V output with 4% accuracy
1.4 A switch allows for input currents up to 1.4 A