Integration Manual
Table Of Contents
- Document information
- Contents
- 1 System description
- 1.1 Overview
- 1.2 Architecture
- 1.3 Pin-out
- 1.4 Operating modes
- 1.5 Supply interfaces
- 1.5.1 Module supply input (VCC)
- 1.5.1.1 VCC supply requirements
- 1.5.1.2 VCC current consumption in LTE connected mode
- 1.5.1.3 VCC current consumption in 2G connected mode
- 1.5.1.4 VCC current consumption in ultra low power deep sleep mode
- 1.5.1.5 VCC current consumption in low power idle mode
- 1.5.1.6 VCC current consumption in active mode (PSM / low power disabled)
- 1.5.2 Generic digital interfaces supply output (V_INT)
- 1.5.1 Module supply input (VCC)
- 1.6 System function interfaces
- 1.7 Antenna interfaces
- 1.8 SIM interface
- 1.9 Data communication interfaces
- 1.10 Audio
- 1.11 General Purpose Input/Output
- 1.12 GNSS peripheral input output
- 1.13 Reserved pins (RSVD)
- 2 Design-in
- 2.1 Overview
- 2.2 Supply interfaces
- 2.2.1 Module supply (VCC)
- 2.2.1.1 General guidelines for VCC supply circuit selection and design
- 2.2.1.2 Guidelines for VCC supply circuit design using a switching regulator
- 2.2.1.3 Guidelines for VCC supply circuit design using LDO linear regulator
- 2.2.1.4 Guidelines for VCC supply circuit design using a rechargeable battery
- 2.2.1.5 Guidelines for VCC supply circuit design using a primary battery
- 2.2.1.6 Guidelines for external battery charging circuit
- 2.2.1.7 Guidelines for external charging and power path management circuit
- 2.2.1.8 Guidelines for particular VCC supply circuit design for SARA-R4x2
- 2.2.1.9 Guidelines for removing VCC supply
- 2.2.1.10 Additional guidelines for VCC supply circuit design
- 2.2.1.11 Guidelines for VCC supply layout design
- 2.2.1.12 Guidelines for grounding layout design
- 2.2.2 Generic digital interfaces supply output (V_INT)
- 2.2.1 Module supply (VCC)
- 2.3 System functions interfaces
- 2.4 Antenna interfaces
- 2.5 SIM interface
- 2.6 Data communication interfaces
- 2.7 Audio
- 2.8 General Purpose Input/Output
- 2.9 GNSS peripheral input output
- 2.10 Reserved pins (RSVD)
- 2.11 Module placement
- 2.12 Module footprint and paste mask
- 2.13 Thermal guidelines
- 2.14 Schematic for SARA-R4 series module integration
- 2.15 Design-in checklist
- 3 Handling and soldering
- 4 Approvals
- 4.1 Product certification approval overview
- 4.2 US Federal Communications Commission notice
- 4.3 Innovation, Science, Economic Development Canada notice
- 4.4 European Conformance CE mark
- 4.5 National Communication Commission Taiwan
- 4.6 ANATEL Brazil
- 4.7 Australian Conformance
- 4.8 GITEKI Japan
- 4.9 KC South Korea
- 5 Product testing
- Appendix
- A Migration between SARA modules
- B Glossary
- Related documentation
- Revision history
- Contact
SARA-R4 series - System integration manual
UBX-16029218 - R20 Design-in Page 47 of 129
C1-Public
Figure 22 and the components listed in Table 12 show an example of a low cost power supply circuit
suitable for all the SARA-R4 series modules, where the module VCC is supplied by a step-down
switching regulator capable of delivering the highest peak / pulse current specified for the 2G
use-case, transforming a 12 V supply input.
SARA-R4 series
12V
R5
C2C1
VCC
INH
FSW
SYNC
OUT
GND
2
6
3
1
7
8
C3
D1
R1
R2
L1
U1
GND
FB
COMP
5
4
R3
C4
R4
C5
52
VCC
53
VCC
51
VCC
C6
C7 C8 C9 C10
Figure 22: Example of low cost VCC supply circuit for SARA-R4 series modules, using a step-down regulator
Reference
Description
Part Number - Manufacturer
C1
22 µF Capacitor Ceramic X5R 1210 10% 25 V
Generic manufacturer
C2
220 nF Capacitor Ceramic X7R 0603 10% 25 V
Generic manufacturer
C3
5.6 nF Capacitor Ceramic X7R 0402 10% 50 V
Generic manufacturer
C4
6.8 nF Capacitor Ceramic X7R 0402 10% 50 V
Generic manufacturer
C5
56 pF Capacitor Ceramic C0G 0402 5% 50 V
Generic manufacturer
C6
100 µF Capacitor Tantalum B_SIZE 20% 6.3V 15m
T520B107M006ATE015 – Kemet
C7
100 nF Capacitor Ceramic X7R 16 V
GRM155R71C104KA01 - Murata
C8
10 nF Capacitor Ceramic X7R 16 V
GRM155R71C103KA01 - Murata
C9
68 pF Capacitor Ceramic C0G 0402 5% 50 V
GRM1555C1E680JA01 - Murata
C10
15 pF Capacitor Ceramic C0G 0402 5% 50 V
GRM1555C1E150JA01 - Murata
D1
Schottky Diode 25V 2 A
STPS2L25 – STMicroelectronics
L1
5.2 µH Inductor 30% 5.28A 22 m
MSS1038-522NL – Coilcraft
R1
4.7 k Resistor 0402 1% 0.063 W
Generic manufacturer
R2
910 Resistor 0402 1% 0.063 W
Generic manufacturer
R3
82 Resistor 0402 5% 0.063 W
Generic manufacturer
R4
8.2 k Resistor 0402 5% 0.063 W
Generic manufacturer
R5
39 k Resistor 0402 5% 0.063 W
Generic manufacturer
U1
Step-Down Regulator 8-VFQFPN 3 A 1 MHz
L5987TR – ST Microelectronics
Table 12: Suggested components for low cost VCC circuit for SARA-R4 series modules, using a step-down regulator
☞ See the section 2.2.1.10, and in particular Figure 31 / Table 20, for the parts recommended to be
provided if the application device integrates an internal antenna.