LTE-A Module Series
EG06 Hardware Design
EG06_Hardware_Design 37 / 89
3.6.3. 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 of EG06 should be able to provide sufficient current up to 2A at least. If
the voltage drop between the input and output is not too high, it is suggested that an LDO should be used
to supply power for the module. If there is a big voltage difference between the input source and the
desired output (VBAT), a buck converter is preferred to be used as the power supply.
The following figure shows a reference design for +5V input power source. The designed output of the
power supply is about 3.8V and the maximum load current is 3A.
In order to avoid damaging internal flash, please do not switch off the power supply when the module
works normally. Only after the module is shut down by PWRKEY or AT command, the power supply can
be cut off.
3.6.4. Monitor the Power Supply
AT+CBC command can be used to monitor the VBAT_BB voltage value. For more details, please refer to
document [1].
3.7. Turn on and off Scenarios
3.7.1. Turn on Module Using the PWRKEY
The following table shows the pin definition of PWRKEY.
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