SIM8300G-M2 Hardware Design V1.01 Draft

SIM8300G-M2 Hardware Design V1.01
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3. Interface Application
3.1 Power Supply
The recommended power supply of SIM8300G-M2 is 3.8V and the voltage ranges from 3.135 V to 4.4 V.
Please make sure that the input voltage will never drop below 3.135V, otherwise the module will be
powered off automatically. The module has 5 power pins and 11 ground pins. To ensure the module works
properly, all pins should be connected.
Table 6: VBAT pins electrical characteristics*
Symbol
Description
Min.
Typ.
Max.
Unit
VBAT
Module power supply voltage
3.135
3.8
4.4
V
I
peak
Peak current
-
-
TBD
A
I
sleep
Current in sleep mode
-
TBD
-
mA
I
leakage
Current in power off mode
-
50
-
uA
3.1.1 Power Supply Design Guide*
When the module transmits at the maximum power, the peak current will be very high which results in
voltage dropping on VBAT. To ensure that the voltage is no less than required 3.135V, the external power
supply current capability must be enough. The following figure shows the maximum voltage drop during the
maximum power radio transmission.
Figure 4: VBAT voltage drop at the maximum power radio transmission