User's Manual

SIM7600G User manual
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3 Interface Application
3.1Power Supply
The power supply pins of MODULE include 4 pins (pin 62&63, pin 38&39) named VBAT.
The 4 VBAT pads supply the power to RF and baseband circuits directly. On VBAT pads, the ripple current
up to 2A typically, due to GSM/GPRS emission burst (every 4.615ms), may cause voltage drop. So the
power supply for these pads must be able to provide sufficient current up to more than 2A in order to avoid
the voltage drop is more than 300mV.
The following figure shows the VBAT voltage ripple wave at the maximum power transmit phase.
Figure 5: VBAT voltage drop during burst emission (GSM/GPRS)
The test condition: The voltage of power supply for VBAT is 3.8V, Cd=100 µF tantalum capacitor
(ESR=0.7Ω) and Cf=100nF (Please refer to Figure 6—Application circuit).
Table 6: VBAT pins electronic characteristic
Symbol
Description
Min.
Typ.
Max.
Unit
VBAT
Module power voltage
3.4
3.8
4.2
V
I
VBAT(peak)
Module power peak current in normal mode.
-
2
-
A
I
VBAT(average)
Module power average current in normal mode
Please refer to the table 34
I
VBAT(sleep)
Power supply current in sleep mode
I
VBAT(power-off)
Module power current in power off mode.
-
-
20
uA
NOTE