Integration Manual

SARA-R4/N4 series - System Integration Manual
UBX-16029218 - R13 Design-in Page 42 of 119
Figure 17 and the components listed in Table 10 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. In this example,
the module VCC is supplied by a step-down switching regulator capable of delivering the maximum peak / pulse current
specified for the LTE use-case, with low output ripple and with fixed switching frequency in PWM mode operation greater
than 1 MHz.
SARA-R40 4M
SARA-R410 M
SARA-N410
12V
C2C1
VCC
EN
PG
VSW
GND
8
9 1
4
2
D1
L1
U1
BST
FB
5
R1
R2
52 VCC
53
VCC
51
VCC
GND
3V8
C6 C7 C8
PGND
C4
C3
C5
11
10
C9
Figure 17: Example of high reliability VCC supply circuit for SARA-R404M /-R410M /-N410, using a step-down regulator
Reference Description Part Number - Manufacturer
C1 10 µF Capacitor Ceramic X7R 50 V Generic manufacturer
C2 10 nF Capacitor Ceramic X7R 16 V Generic manufacturer
C3 22 nF Capacitor Ceramic X7R 16 V Generic manufacturer
C4 22 µF Capacitor Ceramic X5R 25 V Generic manufacturer
C5 22 µF Capacitor Ceramic X5R 25 V Generic manufacturer
C6 100 nF Capacitor Ceramic X7R 16 V GRM155R71C104KA01 - Murata
C7 10 nF Capacitor Ceramic X7R 16 V GRM155R71C103KA01 - Murata
C8 68 pF Capacitor Ceramic C0G 0402 5% 50 V GRM1555C1E680JA01 - Murata
C9 15 pF Capacitor Ceramic C0G 0402 5% 50 V GRM1555C1E150JA01 - Murata
D1 Schottky Diode 30 V 2 A MBR230LSFT1G - ON Semiconductor
L1 4.7 µH Inductor 20% 2 A SLF7045T-4R7M2R0-PF - TDK
R1
470 kΩ Resistor 0.1 W
Generic manufacturer
R2
150 kΩ Resistor 0.1 W
Generic manufacturer
U1 Step-Down Regulator 1 A 1 MHz TS30041 - Semtech
Table 10: High reliability VCC supply circuit components for SARA-R404M /-R410M /-N410, using a step-down regulator
☞
☞☞
☞ See the section 2.2.1.10, and in particular Figure 27 / Table 19, for the parts recommended to be provided if the
application device integrates an internal antenna.