u-blox SARA-G3 Series User Manual

SARA-G3 series - System Integration Manual
UBX-13000995 - R06 Objective Specification System description
Page 27 of 218
1.5 Supply interfaces
1.5.1 Module supply input (VCC)
SARA-G3 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, including V_BCKP Real Time Clock supply, V_INT digital interfaces supply and VSIM SIM card
supply.
During operation, the current drawn by the SARA-G3 series modules through the VCC pins can vary by
several orders of magnitude. This ranges from the high peak 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
1.5.1.3).
1.5.1.1 VCC supply requirements
Table 6Table 6 summarizes the requirements for the VCC module supply. Refer to section 2.1.1 for all
the suggestions to properly design a VCC supply circuit compliant to the requirements listed in Table
6Table 6.
The VCC supply circuit affects the RF compliance of the device integrating SARA-G3 series module with
applicable required certification schemes as well as antenna circuit design. Compliance is guaranteed if
the VCC requirements summarized in the Table 6Table 6 are fulfilled.
Item
Requirement
Remark
VCC nominal voltage
Within VCC normal operating range:
3.35 V min. / 4.50 V max.
The module cannot be switched on if VCC voltage
value is below the normal operating range minimum
limit.
Ensure that the input voltage at VCC pins is above
the minimum limit of the normal operating range for at
least more than 3 s after the module switch-on.
VCC voltage during
normal operation
Within VCC extended operating range:
3.00 V min. / 4.50 V max.
The module may switch off when VCC voltage drops
below the extended operating range minimum limit.
Operation above extended operating range maximum
limit is not recommended and exposure beyond it may
affect device reliability.
VCC average current
Considerably withstand maximum average current
consumption value in connected-mode conditions
specified in SARA-G3 series Data Sheet [1][1].
The maximum average current consumption can be
greater than the specified value according to the actual
antenna mismatching, temperature and VCC voltage.
Section 1.5.1.21.5.1.2 describes connected-mode
current.
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Formatted: Font: 8 pt, French
(France)

u-blox SARA-G3 Series Specifications

General

Brand	u-blox
Model	SARA-G3 Series
Category	GSM/GPRS Modules
Language	English