Quectel RG520N-AT - Power Supply; Power Supply Pins; Reference Design for Power Supply

5G Module Series
RG520N-AT_Hardware_Design 36 / 109
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3.4. Power Supply
3.4.1. Power Supply Pins
The module provides 11 VBAT pins dedicated to the connection with the external power supply. There are
3 separate voltage domains for VBAT.
⚫ 4 VBAT_RF1 pins and 4 VBAT_RF2 pins for RF part.
⚫ 3 VBAT_BB pins for baseband part.
Table 8: Pin Definition of Power Supply
3.4.2. Reference Design for Power Supply
The performance of the module largely depends on the power supply design. The continuous current of
the power supply should be 3 A at least and the peak current should be 4 A at least.
The following figure shows a reference design for +5 V input power source. The designed output of the
power supply is about 3.8 V.
7
VBAT_RF2 should be connected to an external VBAT power supply when Power Class 1.5 (optional) is designed;
otherwise, it is only used to connect decoupling capacitors.
The execution of AT+CFUN will not affect GNSS function.
Pin Name
Pin No.
I/O
Description
Min.
Typ.
Max.
Unit
VBAT_BB
235, 236,
238
PI
Power supply for the
module’s baseband part
3.3
3.8
4.4
V
VBAT_RF1
229, 230,
232, 233
PI
Power supply for the
module’s RF part
3.3
3.8
4.4
V
VBAT_RF2
7
107, 109,
110, 112
PI
Power supply for the
module’s RF part
3.3
3.8
4.4
V
NOTE