User's Manual
Table Of Contents
- Contents
- Table Index
- Figure Index
- 1Introduction
- 1.1Product Outline
- 1.2Hardware Interface Overview
- 1.3Hardware Block Diagram
- 1.4Functional Overview
- 2Package Information
- 2.1.Pin Assignment Overview
- 2.2.Pin Description
- 2.3.Mechanical Information
- 2.4.Footprint Recommendation
- 3Interface Application
- 3.1Power Supply
- 3.3UART Interface
- 3.4USB Interface
- 3.5SIM Interface
- 3.6PCM Interface
- 3.7I2C Interface
- 3.8SPI Interface
- 3.9Network status
- 3.10ADC interface
- 3.11LDO output
- 3.12USB_BOOT Interface
- 3.13GPIO Interface
- 3.14 RF control Interface
- 3.15Force USB Download Interface
- 4RF Specifications
- 4.1LTE RF Specifications
- 4.2LTE Antenna Design Guide
- 4.3GNSS
- 4.4RF traces note
- 5 Electrical Specifications
- 5.1Absolute maximum ratings
- 5.2Operating conditions
- 5.3Operating Mode
- 5.4Current Consumption
- 5.5ESD Notes
- 6 SMT Production Guide
- 6.1Top and Bottom View of SIM7090G
- 6.2Label Information
- 6.3Typical SMT Reflow Profile
- 6.5Baking
- 6.6Stencil Foil Design Recommendation
- 7 Packaging
- 7.1Tray packaging
- 8 Appendix
- 8.1Coding Schemes and Maximum Net Data Rates over Air
- 8.2Related Documents
- 8.3Terms and Abbreviations
- 8.4Safety Caution
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3 Interface Application
3.1 Power Supply
Pin 19 and pin 20 are VBAT power input.
On VBAT pads, when module works on CAT-M1 or NB-IoT mode, the ripple current is up to 0.5A typically.
For steady voltage, the power supply capability must be up to 0.5A.
Table 6: VBAT pins electronic characteristic
Symbol
Description
Min.
Typ.
Max.
Unit
VBAT
Module power voltage
2.7
3.8
4.8
V
I
VBAT(peak)
Module power peak current in CAT-M1 and NB-IoT
emission mode.
-
0.5
-
A
I
VBAT(average)
Module power average current in normal mode
Please refer to the chapter 5.4
I
VBAT(sleep)
Power supply current in sleep mode
I
VBAT(power-off)
Module power current in power off mode.
-
-
15
uA
I
VBAT(PSM)
Module power current in PSM mode.
-
3
-
uA
3.1.1 Power Supply Design Guide
In the user's design, special attention must be paid to the design of the power supply to ensure that the drop
of VBAT is not less than 2.5V even when the module's current consumption reaches the instantaneous
maximum. If the voltage drop is less than 2.5V, the module may shut down due to the low voltage.
The following figure shows the recommended circuit.