Specification:
Output voltage: 3.7V, 5V, 12V (Optional)
Efficiency: 94% (usually is 84%-91%)
Quiescent current: 0.19mA
Operating temperature range : -40~+85 Degrees Celsius
Storage temperature range : -65~+150 Degrees Celsius
Size: 13*11*5.2mm / 0.5*0.4*0.2in
Weight: 2g / 0.1oz (approx.)

Pin description:
Vi : Input positive(+)
GND : Input and Output negative(GND/-)
Vo : Output positive(+)

Output 3.7V :
Input voltage: DC 2.6 ~ 3.3V
Output voltage: DC 3.7V±3%
Maximum output : 3.7V/1200MA

Output 5V :
Input voltage: DC 2.6 ~ 4.5V

Output voltage: DC 5V±3%
Maximum output : 5V/1200MA

Output 12V :
Input voltage: DC 2.6 ~ 6V
Output voltage: DC 12V±3%
Maximum output : 12V/500MA

Package list:
1 * Module

Note:
This is a DC - DC voltage converter module, please pay attention when using:
1, The input voltage should not be higher than maximum input range.
2, The output power cannot be higher than the maximum load for a long time.
3, The input power must be higher than output power, because of the power consumption of the module itself.

FAQ:
Q: Why the output voltage is lower than the nominal voltage?
A :Because the input power is too low.Use a multimeter to test the input voltage, the input voltage is very low at this time.