u-blox LARA-R2 series System Integration Manual page 19

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 affects the RF compliance of the device integrating LARA-R2 series modules
with applicable required certification schemes as well as antenna circuit design. Compliance is
guaranteed if the VCC requirements summarized in the Table 6 are fulfilled.
Item Requirement
VCC nominal voltage Within VCC normal operating range:
3.30 V min. / 4.40 V max
VCC voltage during Within VCC extended operating range:
normal operation
3.00 V min. / 4.50 V max
VCC average current
Support with adequate margin the highest averaged
VCC current consumption value in connected-mode
conditions specified in LARA-R2 series Data Sheet [1]
VCC peak current Support with margin the highest peak VCC current
consumption value in connected-mode conditions
specified in LARA-R2 series Data Sheet [1]
VCC voltage drop Lower than 400 mV
during 2G Tx slots
VCC voltage ripple
Noise in the supply has to be minimized
during 2G/LTE Tx
VCC under/over-shoot Absent or at least minimized
at start/end of Tx slots
Table 6: Summary of VCC supply requirements
UBX-16010573 - R02
LARA-R2 series - System Integration Manual
Remark
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 functional until the VCC voltage is
inside the extended operating range limits.
VCC voltage must be above the extended operating
range minimum limit to switch-on the module.
The module may switch-off when the VCC voltage drops
below the extended operating range minimum limit.
Operation above VCC extended operating range is not
recommended and may affect device reliability.
The highest averaged VCC current consumption can be
greater than the specified value according to the actual
antenna mismatching, temperature and VCC voltage.
See 1.5.1.2, 1.5.1.3 for connected-mode current profiles.
The specified highest peak of VCC current consumption
occurs during GSM single transmit slot in 850/900 MHz
connected-mode, in case of mismatched antenna.
See 1.5.1.2 for 2G connected-mode current profiles.
VCC voltage drop directly affects the RF compliance with
applicable certification schemes.
Figure 5 describes VCC voltage drop during Tx slots.
VCC voltage ripple directly affects the RF compliance with
applicable certification schemes.
Figure 5 describes VCC voltage ripple during Tx slots.
VCC under/over-shoot directly affects the RF compliance
with applicable certification schemes.
Figure 5 describes VCC voltage under/over-shoot.
Objective Specification System description
Page 19 of 148