Reference Design For Power Supply - Quectel EM160R-GL Hardware Design

The following figure shows a reference circuit of VCC.
VCC (3.7 V Typ.)

3.3.2. Reference Design for Power Supply

The power source is critical to the module's performance. The power supply of the module should be able
to provide a sufficient current of 2 A at least and the peak current should be 3 A at least.
The following figure shows a reference design for +5.0 V input power source. The typical output of the
power supply is about 3.7 V.
PWR_IN
+
D1
C1 C2
470 μF
TVS 100 nF
R7
4.7K
PWR_EN
NOTE
To avoid corrupting the data in the internal flash, do not switch off the power supply when the module
works normally. Only after shutting down the module with FULL_CARD_POWER_OFF# or AT command,
can you cut off the power supply.
EM160R-GL_Hardware_Design
C2
C4 C6
220 μF
1 μF
100 nF
C1
C3 C5
TVS
220 μF
1 μF
100 nF
Figure 4: Reference Design of VCC
R1
205K
C3
33 pF R2 VFB
80.6K
R3 R4
10K 182K
Q1
NPN
R8 C4
C5
47K
10 nF
NM
Figure 5: Reference Design of Power Supply
VCC 2, 4
C8 C10
33 pF 10 pF
GND
3, 5, 11
VCC 70, 72, 74
C7 C9
33 pF 10 pF
27, 33, 39,
GND
45, 51, 57,
71, 73
L1
U1
1.5
16 10
VIN PH
1 11
VIN PH
2 12 C6
VIN PH
15 13
100 nF
EN BOOT
6 14
VSNS PWRGD
PWRGD
7 3
COMP GND
8 4
RT/CLK GND
9 5
SS AGND
EP
17
VFB
C7
10 nF
LTE-A Module Series
ET
PMU
PWR_OUT
μ
H
+
C8 C11
C9 C10
220 μF
100 nF 33 pF 10 pF
R5
330K 1%
R6
100K 1%
25 / 73