Application Interface; Power Supply - SimCom SIM7200 Hardware Manual

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Step 4: Push SIM7200 from the direction as following figure shows.
Figure 14: Step 4 of removing SIM7200 from the main board

4. Application Interface

4.1

Power Supply

The recommended power supply of SIM7200 is 3.3V and the voltage ranges from 3.2 V to 3.6 V. The SIM7200
has 4 power pins and 13 Ground pins, to ensure the SIM7200 module works normally, all the pins must be
connected. The PCIe connector pin is defined as necessary to support 500mA per Pin continuously.
When the module works at the 2G mode, the transmitting burst will cause voltage drop and the power supply
must be able to provide sufficient current up to 2.5A. For the 3.3V input, 3 bypass capacitors (low ESR) such as
220µF are strongly recommended. Make sure that the voltage does not drop below 3.2 V in any case.
The 10pF and 33pF capacitors can effectively eliminate the high frequency interference. A 5.1V/500mW
Zener diode can be reserved, the diode can prevent chip from damaging by the voltage surge. These
capacitors and Zener diode should be placed as close to SIM7200 VCC pins as possible.
SIM7200
VCC_3V3
VCC
220uF
220uF 220uF 10pF
33pF
22uF
5.1V
Figure 15: Recommended power circuit of SIM7200 module
SIM7200-PCIe_ Hardware_Design _V1.01 21 2016-05-19