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 45 of 129
C1-Public
Figure 20 and the components listed in Table 10 show an example of a high reliability power supply
circuit for the SARA-R4 series modules that support 2G radio access technology. This circuit is also
suitable for the other SARA-R4 series modules, where the module VCC input is supplied by a step-
down switching regulator capable of delivering the highest peak / pulse current specified for the 2G
use-case, with low output ripple and with fixed switching frequency in PWM mode operation greater
than 1 MHz.
SARA-R4 series
12V
C5
R3
C4
R2
C2C1
R1
VIN
RUN
VC
RT
PG
SYNC
BD
BOOST
SW
FB
GND
6
7
10
9
5
C6
1
2
3
8
11
4
C7
C8
D1
R4
R5
L1
C3
U1
52
VCC
53
VCC
51
VCC
GND
C9 C10 C11
Figure 20: Example of high reliability VCC supply circuit for SARA-R4 series modules, using a step-down regulator
Reference
Description
Part Number - Manufacturer
C1
10 µF Capacitor Ceramic X7R 5750 15% 50 V
Generic manufacturer
C2
10 nF Capacitor Ceramic X7R 0402 10% 16 V
Generic manufacturer
C3
680 pF Capacitor Ceramic X7R 0402 10% 16 V
Generic manufacturer
C4
22 pF Capacitor Ceramic C0G 0402 5% 25 V
Generic manufacturer
C5
10 nF Capacitor Ceramic X7R 0402 10% 16 V
Generic manufacturer
C6
470 nF Capacitor Ceramic X7R 0603 10% 25 V
Generic manufacturer
C7
100 µF Capacitor Tantalum B_SIZE 20% 6.3V 15m
T520B107M006ATE015 – Kemet
C8
100 nF Capacitor Ceramic X7R 16 V
GRM155R71C104KA01 - Murata
C9
10 nF Capacitor Ceramic X7R 16 V
GRM155R71C103KA01 - Murata
C10
68 pF Capacitor Ceramic C0G 0402 5% 50 V
GRM1555C1E680JA01 - Murata
C11
15 pF Capacitor Ceramic C0G 0402 5% 50 V
GRM1555C1E150JA01 - Murata
D1
Schottky Diode 40 V 3 A
MBRA340T3G - ON Semiconductor
L1
10 µH Inductor 744066100 30% 3.6 A
744066100 - Wurth Electronics
R1
470 k Resistor 0402 5% 0.1 W
Generic manufacturer
R2
15 k Resistor 0402 5% 0.1 W
Generic manufacturer
R3
22 k Resistor 0402 5% 0.1 W
Generic manufacturer
R4
390 k Resistor 0402 1% 0.063 W
Generic manufacturer
R5
100 k Resistor 0402 5% 0.1 W
Generic manufacturer
U1
Step-Down Regulator MSOP10 3.5 A 2.4 MHz
LT3972IMSE#PBF - Linear Technology
Table 10: Components for high reliability VCC supply 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.