Ublox SARA-N210, System Integration Manual

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SARA-N2 series - System Integration Manual
UBX-17005143 - R06 System description Page 11 of 82
Switch ON:
•
Apply VCC
If there is no activity for
a defined time interval
•
Network paging
•
New up-link message request
from the Application Processor
Up-linlk transmission, reception
of network signalling indications
or downlink data reception
No RF Tx/Rx in progress
Not
powered
Active Connected Deep-sleep
Switch OFF:
•
Remove VCC
Figure 2: Operating modes transitions
1.5 Supply interfaces
1.5.1 Module supply input (VCC)
The modules must be supplied via all 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, including V_INT (digital interfaces supply) and VSIM (SIM card supply).
During operation, the current drawn by the SARA-N2 series modules through the VCC pins can vary
by several orders of magnitude. This ranges from the high peak of current consumption during data
transmission at maximum power level in connected mode, to the low current consumption during
deep-sleep mode (as described in section
1.5.1.2 ).
1.5.1.1 VCC supply requirements
Table 6 summarizes the requirements for the VCC module supply. See section 2.2.1 for all the
suggestions to properly design a VCC supply circuit compliant to the requirements listed in Table 6 .
⚠
VCC supply circuit design may affect the RF compliance of the device integrating SARA-N2 series
modules with applicable required certification schemes. Compliance is not guaranteed if the VCC
requirements summarized in the
Table 6 are not fulfilled.