Product Info
Table Of Contents
- About the Document
- Contents
- Table Index
- Figure Index
- 1 Introduction
- 2 Product Concept
- 3 Application Interfaces
- 3.1. General Description
- 3.2. Pin Assignment
- 3.3. Pin Description
- 3.4. Power Supply
- 3.5. Turn on and off Scenarios
- 3.6. VRTC Interface
- 3.7. Power Output
- 3.8. Battery Charge and Management
- 3.9. USB Interfaces
- 3.10. UART Interfaces
- 3.11. (U)SIM Interfaces
- 3.12. SD Card Interface
- 3.13. GPIO Interfaces
- 3.14. I2C Interfaces
- 3.15. I2S Interfaces
- 3.16. SPI Interface
- 3.17. ADC Interfaces
- 3.18. LCM Interfaces
- 3.19. Touch Panel Interfaces
- 3.20. Camera Interfaces
- 3.21. Sensor Interfaces
- 3.22. Audio Interfaces
- 3.23. Emergency Download Interface
- 4 Wi-Fi and BT
- 5 GNSS
- 6 Antenna Interfaces
- 7 Electrical, Reliability and Radio Characteristics
- 8 Mechanical Dimensions
- 9 Storage, Manufacturing and Packaging
- 10 Appendix A References
- 11 Appendix B GPRS Coding Schemes
- 12 Appendix C GPRS Multi-slot Classes
- 13 Appendix D EDGE Modulation and Coding Schemes
- IC & FCC Requirement
Smart LTE Module Series
SC66 Hardware Design
SC66_Hardware_Design 44 / 139
The following figure shows a reference design for +5V input power source which adopts an LDO
(MIC29502WU) from MICROCHIP. The typical output voltage is 4.0V and the maximum rated current is
5.0A.
DC_
IN
C1
C2
MIC29502WU U1
IN
OUT
EN
GND
ADJ
2 4
1
3
5
VBAT
100nF
C3
470uF
C4
100nF
R2
220K
100k
R3
470uF
470R
51K
R4
R1
1%
1%
Figure 5: Referfence Circuit of Power Supply
1. It is recommended to switch off the power supply when the module is in abnormal state, and then
switch on the power to restart the module.
2. The module supports battery charging function by default. If the above powe
r supply design is
adopted, please make sure the charging function is disabled by software, or connect VBAT to
Schottky diode in series to avoid the reverse current to the power supply chip.
3. When the battery power is reduced to 0%, the system will trigger automatic shutdown, so the design
of power supply should be consistent with the configuration of fuel gauge driver.
NOTES