User's Manual
Table Of Contents
- RF Exposure Statement:
- General Notes
- Copyright
- Contents
- Table Index
- Figure Index
- Revision History
- 1Introduction
- 2Package Information
- 3Interface Application
- 3.1Power Supply
- Figure 5: VBAT voltage drop during burst emission
- 3.1.1Power Supply Design Guide
- Figure 6: Power supply application circuit
- Table 7: Recommended Zener diode list
- 3.1.2Recommended Power Supply Circuit
- Figure 7: Linear regulator reference circuit
- Figure 8: Switching mode power supply reference ci
- 3.1.3Voltage Monitor
- 3.2Power on/Power off/Reset Function
- 3.3UART Interface
- 3.4USB Interface
- 3.5USIM Interface
- 3.6PCM Interface
- 3.7SD Interface
- 3.8I2C Interface
- 3.9SDIO Interface
- 3.10SPI Interface
- 3.11Network status
- 3.12Flight Mode Control
- Switch
- 3.1Power Supply
- 4RF Specifications
- 5Electrical Specifications
- 6SMT Production Guide
- 7Packaging
- Appendix
SIM7600SA-H_User Manual_V1.00
2017-10-11
Smart Machine Smart Decision
3 Interface Application
3.1 Power Supply
The power supply pins of SIM7600SA-H 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.
urst:2A
Max:300mV
Figure 5: VBAT voltage drop during burst emission (GSM/GPRS)
Note: 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
577us
I
VBAT
4.615ms
B
VBAT