Monitor The Power Supply; Turn On - Quectel EM05-G Hardware Design

LDO_IN
D1
C1
470 μF
TVS
R5
4.7K
MCU_POWER_ON/OFF
47K
NOTE
To avoid damaging internal flash, do not switch off the power supply when the module is working normally.
It is suggested that the power supply should be cut off after pulling down RESET# for about 100 ms.

3.3.3. Monitor the Power Supply

AT+CBC can be used to monitor the voltage value of VCC. For more details, see document [3].

3.4. Turn on

FULL_CARD_POWER_OFF# is used to turn on/off the module. When the input signal is asserted high (≥
1.19 V), the module will turn on.
This input signal is 3.3 V tolerant and can be driven by either 1.8 V or 3.3 V GPIO. Also, it has internally
pulled down with a 100 kΩ resistor.
EM05-G_Hardware_Design
MIC29302WU
2
IN
R1
C2
51K
100 nF
R6
Figure 8: Reference Circuit for the Power Supply
U1
4
OUT
R2
82K 1%
R4
470R
R3
47K 1%
LTE Standard Module Series
EM05-G Hardware Design
C3
C4 C5 C6
470 μF
100 nF 33 pF 10 pF
3.3V
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