Decrease Voltage Drop - Quectel BG95 Series Hardware Design

Lpwa module series
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Table 7: VBAT and GND Pins
Pin Name
Pin No.
VBAT_RF
52, 53
VBAT_BB
32, 33
3, 31, 48, 50,
54, 55, 58,
59, 61, 62,
GND
67~74,
79~82,
89~91,
100~102

3.5.2. Decrease Voltage Drop

BG95-M1/-M2/-N1: The power supply range of BG95-M1/-M2/-N1 is from 2.4V to 4.8V. Please make
sure that the input voltage will never drop below 2.4V.
BG95-M3: The power supply range of the BG95-M3 is from 3.3V to 4.3V. Please make sure that the
input voltage will never drop below 3.3V.
The following figure shows the voltage drop during burst transmission in 2G network of BG95-M3 module.
The voltage drop will be less in LTE Cat M1 and/or LTE Cat NB2 networks.
Min.3.3V
Figure 4: Power Supply Limits during Burst Transmission
To decrease voltage drop, a bypass capacitor of about 100µF with low ESR should be used, and a
multi-layer ceramic chip capacitor (MLCC) array should also be reserved due to its low ESR. It is
recommended to use three ceramic capacitors (100nF, 33pF, 10pF) for composing the MLCC array, and
place these capacitors close to VBAT pins. The main power supply from an external application has to be
BG95_Hardware_Design
Description
Power supply for the
module's RF part
Power supply for the
module's baseband
part
Ground
Burst
Transmission
VBAT
Module
BG95-M1/-M2/-N1
BG95-M3
BG95-M1/-M2/-N1
BG95-M3
Burst
Transmission
Drop
LPWA Module Series
BG95 Hardware Design
Min.
Typ.
Max.
Unit
2.4
3.3
4.8
V
3.3
3.8
4.3
V
2.4
3.3
4.8
V
3.3
3.8
4.3
V
-
-
-
-
Ripple
34 / 80

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