Parameters:
1. The output voltage can be set to 5V/8V/12V, the default is 12V
2. Input voltage range: 2.5V~VOUT. The input voltage must be lower than the set output voltage
3. Output capacity: when input with 3.7V lithium battery, it can output 5V1A, 8V0.5A,
9V0.45A, 12V0.3A
4. When using 5V input, it can output 8V0.7A, 9V0.7A, 12V0.5A
5. When the default output is 12V, the LED indicator consumes about 1mA.
6. If the indicator light is turned off, the input current is 1mA when no load
