Figure 4: Reference Circuit of VCC
3.3.2. Reference Design for Power Supply
Power design for the module is very important, as the performance of the module largely depends on the
power source. The power supply can provide sufficient current (at least 2.5 A). If the voltage drop between
the input and output is not too high, an LDO is suggested to be used to supply power for the module. If
there is a big voltage difference between the input source and the desired output (VCC), a buck converter
is preferred to be used as the power supply.
The following figure shows a reference design for +5 V input power source. The typical output of the
power supply is about 3.7 V and the maximum load current is 3 A.
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