Power Supply Voltage Monitoring; Voltage Stability Requirements - Quectel RG520N-AT Hardware Design

+5 V
C1
TV S
NOTE
1. To avoid corrupting the data in the internal flash, do not switch off the power supply when the
module works normally. Only after the module is turned off with PWRKEY or AT command, the
power supply can be cut off.
2. If you turn off the module by cutting off the power supply, do not power on the module until the
power drops to 0 V, or there is a risk that the module cannot be turned on.

3.4.3. Power Supply Voltage Monitoring

AT+CBC can monitor the VBAT_BB voltage value.

3.4.4. Voltage Stability Requirements

The power supply range of the module is from 3.3 V to 4.4 V. Please make sure the input voltage will
never drop below 3.3 V.
RG520N-AT_Hardware_Design
GND
R1
C2 C3
C4
3V8_EN
Figure 8: Reference Design of Power Supply
5G Module Series
L1
R2
R3
R4
GND
GND
C5 C6
GND GND
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