Integration Manual
Table Of Contents
- 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 2G connected mode
- 1.5.1.3 VCC current consumption in 3G connected mode
- 1.5.1.4 VCC current consumption in LTE connected mode
- 1.5.1.5 VCC current consumption in cyclic low power idle mode / active mode
- 1.5.1.6 VCC current consumption in fixed active mode
- 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 interfaces
- 1.9 Data communication interfaces
- 1.10 eMMC interface
- 1.11 Digital Audio interfaces
- 1.12 ADC interfaces
- 1.13 General Purpose Input/Output
- 1.14 Reserved pins (RSVD)
- 1.15 System features
- 1.15.1 Network indication
- 1.15.2 Jamming detection
- 1.15.3 IP modes of operation
- 1.15.4 Dual stack IPv4 and IPv6
- 1.15.5 Embedded TCP/IP and UDP/IP
- 1.15.6 Embedded FTP and FTPS
- 1.15.7 Embedded HTTP and HTTPS
- 1.15.8 SSL and TLS
- 1.15.9 Firmware update Over AT (FOAT)
- 1.15.10 Firmware update Over The Air (FOTA)
- 1.15.11 Power Saving
- 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 a 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 Additional guidelines for VCC supply circuit design
- 2.2.1.7 Guidelines for the external battery charging circuit
- 2.2.1.8 Guidelines for external charging and power path management circuit
- 2.2.1.9 Guidelines for removing VCC supply
- 2.2.1.10 Guidelines for VCC supply layout design
- 2.2.1.11 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 interface
- 2.5 SIM interfaces
- 2.6 Data communication interfaces
- 2.7 eMMC interface
- 2.8 Digital Audio interface
- 2.9 ADC interfaces
- 2.10 General Purpose Input/Output
- 2.11 Reserved pins (RSVD)
- 2.12 Module placement
- 2.13 Module footprint and paste mask
- 2.14 Thermal guidelines
- 2.15 Design-in checklist
- 3 Handling and soldering
- 4 Approvals
- 5 Product testing
- 6 FCC Notes
- Appendix
- Glossary
- Related documents
- Revision history
- Contact
TOBY-L3 series - System Integration Manual
TSD-19090601 - R13 System Integration Manual Page 25 of 143
1.5 Supply interfaces
1.5.1 Module supply input (VCC)
The modules must be supplied via the three VCC pins that represent the module power supply input.
The VCC pins are internally connected to the RF power amplifier and to the integrated Power Management
Unit: all supply voltages needed by the module are generated from the VCC supply by integrated voltage
regulators, V_INT generic digital interfaces supply, VSIM SIM card supply, V_ETH SGMII interface supply,
V_MMC eMMC interface supply, and any other internal rail.
During operation, the current drawn by the TOBY-L3 series modules through the VCC pins can vary by
several orders of magnitude. This ranges from the pulse of current consumption during GSM transmitting
bursts at maximum power level in connected mode (as described in section 1.5.1.2) to the low current
consumption during low power idle mode with power saving enabled (as described in section 1.5.1.5).
Figure 3 provides a simplified block diagram of the TOBY-L3 series modules’ internal VCC supply routing.
72
VCC
71
VCC
70
VCC
TOBY-L3 series
Power
Management
Unit
Memory
Baseband
Processor
Transceiver
RF PMU
Cellular
Power Amplifiers
Figure 3: TOBY-L3 series modules’ internal VCC supply routing simplified block diagram
1.5.1.1 VCC supply requirements
Table 7 summarizes the requirements for the VCC modules supply. See section 2.2.1 for suggestions on
how to properly design a VCC supply circuit compliant with the requirements listed in Table 7.
⚠ The supply circuit affects the RF compliance of the device integrating TOBY-L3 series modules with
applicable required certification schemes as well as antenna circuit design. Compliance is guaranteed if
the requirements summarized in Table 7 are fulfilled.
Item
Requirement
Remark
VCC nominal voltage
Within VCC normal operating range:
3.30 V min. / 4.20 V max.
RF performance is guaranteed when VCC PA voltage is inside the
normal operating range limits.
RF performance may be affected when VCC PA voltage is outside
the normal operating range limits, though the module is still fully