Hardware Design

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SIM8200EA-M2 card Hardware Design _V1.01 20 2019-06-27
3 Interface Application
3.1 Power Supply
The recommended power supply of SIM8200EA-M2 is 3.8V and the voltage ranges from 3.3V to
4.3 V. The SIM8200EA-M2 has 5 power pins and 11 Ground pins, to ensure the SIM8200EA -M2
card works normally, all the pins must be connected. The M.2 connector pin is defined to support
500mA current per pin continuously.
Table 6: VBAT pins electronic characteristic
Symbol Description Min. Typ. Max. Unit
VBAT Module power voltage 3.135 3.8 4.3 V
I
VBAT(peak)
Module power peak current in normal mode. - TDB - A
I
VBAT(power-off)
Module power current in power off mode. - TDB
-
uA
3.1.1 Power Supply Design Guide
Make sure that the voltage on the 3.8V pins will never drop below 3.135V, even during a transmit
burst, when current consumption may rise up to 1.0A. If the voltage drops below 3.135V, the
module will be powered off automatically.
Note: Be sure the power supply for VBAT pins can support more than1.0A, using a total of more
than 100uF capacitors is recommended, in order to avoid the voltage drop to lower than 3.135V.
Some multi-layer ceramic chip (MLCC) capacitors (0.1/1uF) with low ESR in high frequency band
can be used for EMC.
These capacitors should be put as close as possible to VBAT pads. Also, users should keep VBAT
trace on circuit board wider than 2 mm to minimize PCB trace impedance. The following figure
shows the recommended circuit.
3.3V
3.3V
2
GND
GND
SIM8200EA-M.2
Cc
D1
100uF
VBAT
Ca
220uF
3.3V
3.3V
4
70
72
3.3V
74
Cb
100nF
Cd
33pF
Cb
100uF
5.1V
Figure 4: Power supply application circuit
Note: The test condition: The voltage of power supply for VBAT is 3.3V, Ca is 220 µF tantalum
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