Integration Manual
Table Of Contents
- Preface
- 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 or 3.3Vaux)
- 1.5.1.1 VCC or 3.3Vaux supply requirements
- 1.5.1.2 VCC or 3.3Vaux current consumption in 2G connected-mode
- 1.5.1.3 VCC or 3.3Vaux current consumption in 3G connected mode
- 1.5.1.4 VCC or 3.3Vaux current consumption in LTE connected-mode
- 1.5.1.5 VCC or 3.3Vaux current consumption in cyclic idle/active mode (power saving enabled)
- 1.5.1.6 VCC or 3.3Vaux current consumption in fixed active-mode (power saving disabled)
- 1.5.2 RTC supply input/output (V_BCKP)
- 1.5.3 Generic digital interfaces supply output (V_INT)
- 1.5.1 Module supply input (VCC or 3.3Vaux)
- 1.6 System function interfaces
- 1.7 Antenna interface
- 1.8 SIM interface
- 1.9 Data communication interfaces
- 1.10 Audio
- 1.11 General Purpose Input/Output
- 1.12 Mini PCIe specific signals (W_DISABLE#, LED_WWAN#)
- 1.13 Reserved pins (RSVD)
- 1.14 Not connected pins (NC)
- 1.15 System features
- 1.15.1 Network indication
- 1.15.2 Antenna supervisor
- 1.15.3 Jamming detection
- 1.15.4 IP modes of operation
- 1.15.5 Dual stack IPv4/IPv6
- 1.15.6 TCP/IP and UDP/IP
- 1.15.7 FTP
- 1.15.8 HTTP
- 1.15.9 SSL / TLS
- 1.15.10 Bearer Independent Protocol
- 1.15.11 Wi-Fi integration
- 1.15.12 Firmware update Over AT (FOAT)
- 1.15.13 Firmware update Over The Air (FOTA)
- 1.15.14 Smart temperature management
- 1.15.15 SIM Access Profile (SAP)
- 1.15.16 Power saving
- 2 Design-in
- 2.1 Overview
- 2.2 Supply interfaces
- 2.2.1 Module supply (VCC or 3.3Vaux)
- 2.2.1.1 General guidelines for VCC or 3.3Vaux supply circuit selection and design
- 2.2.1.2 Guidelines for VCC or 3.3Vaux supply circuit design using a switching regulator
- 2.2.1.3 Guidelines for VCC or 3.3Vaux supply circuit design using a Low Drop-Out linear regulator
- 2.2.1.4 Guidelines for VCC supply circuit design using a rechargeable Li-Ion or Li-Pol battery
- 2.2.1.5 Guidelines for VCC supply circuit design using a primary (disposable) battery
- 2.2.1.6 Additional guidelines for VCC or 3.3Vaux supply circuit design
- 2.2.1.7 Guidelines for external battery charging circuit
- 2.2.1.8 Guidelines for external battery charging and power path management circuit
- 2.2.1.9 Guidelines for VCC or 3.3Vaux supply layout design
- 2.2.1.10 Guidelines for grounding layout design
- 2.2.2 RTC supply output (V_BCKP)
- 2.2.3 Generic digital interfaces supply output (V_INT)
- 2.2.1 Module supply (VCC or 3.3Vaux)
- 2.3 System functions interfaces
- 2.4 Antenna interface
- 2.5 SIM interface
- 2.6 Data communication interfaces
- 2.7 Audio interface
- 2.8 General Purpose Input/Output
- 2.9 Mini PCIe specific signals (W_DISABLE#, LED_WWAN#)
- 2.10 Reserved pins (RSVD)
- 2.11 Module placement
- 2.12 TOBY-L2 series module footprint and paste mask
- 2.13 MPCI-L2 series module installation
- 2.14 Thermal guidelines
- 2.15 ESD guidelines
- 2.16 Schematic for TOBY-L2 and MPCI-L2 series module integration
- 2.17 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 and Economic Development Canada notice
- 4.4 Brazilian Anatel certification
- 4.5 European Conformance CE mark
- 4.6 Australian Regulatory Compliance Mark
- 4.7 Taiwanese NCC certification
- 4.8 Japanese Giteki certification
- 5 Product testing
- Appendix
- A Migration between TOBY-L1 and TOBY-L2
- B Glossary
- Related documents
- Revision history
- Contact
TOBY-L2 and MPCI-L2 series - System Integration Manual
UBX-13004618 - R26 Design-in
Page 72 of 162
typical choice when the charging source has a relatively low nominal voltage (~5 V). If both a permanent primary
supply / charging source (e.g. ~12 V) and a rechargeable back-up battery (e.g. 3.7 V Li-Pol) are available at the
same time in the application as possible supply source, then a proper charger / regulator with integrated power
path management function can be selected to supply the module while simultaneously and independently
charging the battery. See 2.2.1.7, 2.2.1.8 and 2.2.1.6, 2.2.1.9, 2.2.1.10 for specific design-in.
The use of a primary (not rechargeable) battery is in general uncommon, but appropriate parts can be selected
given that the most cells available are seldom capable of delivering the maximum current specified in TOBY-L2
series Data Sheet [1] during connected-mode. Carefully evaluate the usage of super-capacitors as supply source
since aging and temperature conditions significantly affect the actual capacitor characteristics. See 2.2.1.5 and
2.2.1.6, 2.2.1.9, 2.2.1.10 for specific design-in.
Rechargeable 3-cell Li-Ion or Li-Pol and Ni-MH chemistry batteries reach a maximum voltage that is above the
maximum rating for the 3.3Vaux supply of MPCI-L2 modules, and should therefore be avoided. The use of
rechargeable, not-rechargeable battery or super-capacitors is very uncommon for Mini PCI Express applications, so
that these supply sources types are not considered for MPCI-L2 modules.
The usage of more than one DC supply at the same time should be carefully evaluated: depending on the supply
source characteristics, different DC supply systems can result as mutually exclusive.
The following sections highlight some design aspects for each of the supplies listed above providing application
circuit design-in compliant with the module VCC requirements summarized in Table 7.
2.2.1.2 Guidelines for VCC or 3.3Vaux supply circuit design using a switching regulator
The use of a switching regulator is suggested when the difference from the available supply rail to the VCC or the
3.3Vaux value is high, since switching regulators provide good efficiency transforming a 12 V or greater voltage
supply to the typical 3.8 V value of the VCC supply or the typical 3.3 V value of the 3.3Vaux supply.
The characteristics of the switching regulator connected to VCC or 3.3Vaux pins should meet the following
prerequisites to comply with the module VCC or 3.3Vaux requirements summarized in Table 7:
Power capability: the switching regulator with its output circuit must be capable of providing a voltage value
to the VCC or 3.3Vaux pins within the specified operating range and must be capable of delivering to VCC
or 3.3Vaux pins the maximum peak / pulse current consumption during Tx burst at maximum Tx power
specified in the TOBY-L2 series Data Sheet [1] or in the MPCI-L2 series Data Sheet [2].
Low output ripple: the switching regulator together with its output circuit must be capable of providing a
clean (low noise) VCC or 3.3Vaux voltage profile.
High switching frequency: for best performance and for smaller applications it is recommended to select a
switching frequency ≥ 600 kHz (since L-C output filter is typically smaller for high switching frequency). The
use of a switching regulator with a variable switching frequency or with a switching frequency lower than 600
kHz must be carefully evaluated since this can produce noise in the VCC or 3.3Vaux voltage profile and
therefore negatively impact LTE/3G/2G modulation spectrum performance. An additional L-C low-pass filter
between the switching regulator output to VCC or 3.3Vaux supply pins can mitigate the ripple at the input
of the module, but adds extra voltage drop due to resistive losses on series inductors.
PWM mode operation: it is preferable to select regulators with Pulse Width Modulation (PWM) mode. While
in connected-mode, the Pulse Frequency Modulation (PFM) mode and PFM/PWM modes transitions must be
avoided to reduce the noise on the VCC or 3.3Vaux voltage profile. Switching regulators can be used that
are able to switch between low ripple PWM mode and high ripple PFM mode, provided that the mode
transition occurs when the module changes status from the idle/active-modes to connected-mode. It is
permissible to use a regulator that switches from the PWM mode to the burst or PFM mode at an appropriate
current threshold.