SARA-R4/N4 series - System Integration Manual
UBX-16029218 - R11
Design-in
Page 61 of 157
C4
10 nF Capacitor Ceramic X7R 16 V
GRM155R71C103KA01 - Murata
C5
68 pF Capacitor Ceramic C0G 0402 5% 50 V
GRM1555C1E680JA01 - Murata
C6
15 pF Capacitor Ceramic C0G 0402 5% 50 V
GRM1555C1E150JA01 - Murata
R1
9.1 k
Resistor 0402 5% 0.1 W
Generic manufacturer
R2
3.9 k
Resistor 0402 5% 0.1 W
Generic manufacturer
U1
LDO Linear Regulator ADJ 3.0 A
LT1764AEQ#PBF - Linear Technology
Table 12: Suggested components for high reliability VCC circuit for SARA-R4/N4 series modules, using an LDO regulator
☞
See the section
, and in particular
, for the parts recommended to be
provided if the application device integrates an internal antenna.
and the components listed in
show an example of a high reliability power supply circuit
for SARA-R404M, SARA-R410M and SARA-N410 modules, which do not support the 2G radio access
technology, where the module
VCC
is supplied by an LDO linear regulator capable of delivering maximum
peak / pulse current specified for LTE use-case, with suitable power handling capability.
It is recommended to configure the LDO linear regulator to generate a voltage supply value slightly below
the maximum limit of the module
VCC
normal operating range (e.g. ~4.1 V for the
VCC
, as in the circuits
described in
and
). This reduces the power on the linear regulator and improves the
thermal design of the circuit.
5V
C1
R1
IN
OUT
ADJ
GND
5
8
1
3
4
C2
R2
R3
U1
EN
SARA-R4 0 4 M
SARA-R4 10 M
SARA-N410
52
VCC
53
VCC
51
VCC
GND
C4
C3
C5
C6
Figure 20: Example of high reliability VCC supply circuit for SARA-R404M /-R410M /-N410, using an LDO linear regulator
Reference
Description
Part Number - Manufacturer
C1
1
µ
F Capacitor Ceramic X5R 6.3 V
Generic manufacturer
C2
22
µ
F Capacitor Ceramic X5R 25 V
Generic manufacturer
C3
100 nF Capacitor Ceramic X7R 16 V
GRM155R71C104KA01 - Murata
C4
10 nF Capacitor Ceramic X7R 16 V
GRM155R71C103KA01 - Murata
C5
68 pF Capacitor Ceramic C0G 0402 5% 50 V
GRM1555C1E680JA01 - Murata
C6
15 pF Capacitor Ceramic C0G 0402 5% 50 V
GRM1555C1E150JA01 - Murata
R1
47 k
Resistor 0.1 W
Generic manufacturer
R2
41 k
Resistor 0.1 W
Generic manufacturer
R3
10 k
Resistor 0.1 W
Generic manufacturer