u-blox LARA-R2 series System Integration Manual page 68

Figure 27 and the components listed in Table 20 show an example of a low cost power supply circuit, where the
VCC module supply is provided by a step-down switching regulator capable of delivering to VCC pins the
specified maximum peak / pulse current, transforming a 12 V supply input.
12V
C1 C6
R5
Figure 27: Example of low cost VCC supply application circuit using step-down regulator
Reference Description
C1 22 µF Capacitor Ceramic X5R 1210 10% 25 V
C2
100 µF Capacitor Tantalum B_SIZE 20% 6.3V 15m
C3 5.6 nF Capacitor Ceramic X7R 0402 10% 50 V
C4 6.8 nF Capacitor Ceramic X7R 0402 10% 50 V
C5 56 pF Capacitor Ceramic C0G 0402 5% 50 V
C6 220 nF Capacitor Ceramic X7R 0603 10% 25 V
D1 Schottky Diode 25V 2 A
L1
5.2 µH Inductor 30% 5.28A 22 m
R1 4.7 k Resistor 0402 1% 0.063 W
910  Resistor 0402 1% 0.063 W
R2
82  Resistor 0402 5% 0.063 W
R3
R4
8.2 k Resistor 0402 5% 0.063 W
R5 39 k Resistor 0402 5% 0.063 W
U1 Step-Down Regulator 8-VFQFPN 3 A 1 MHz
Table 20: Components for low cost VCC supply application circuit using a step-down regulator
UBX-16010573 - R02
8
VCC
1
3
OUT
INH
6 U1 5
FSW FB
2 4
SYNC COMP
GND
7
Objective Specification
LARA-R2 series - System Integration Manual
L1
R3
D1
R1
C3
C4
R4
R2
C5
Part Number - Manufacturer
GRM32ER61E226KE15 – Murata
T520B107M006ATE015 – Kemet
GRM155R71H562KA88 – Murata
GRM155R71H682KA88 – Murata
GRM1555C1H560JA01 – Murata
GRM188R71E224KA88 – Murata
STPS2L25 – STMicroelectronics
MSS1038-522NL – Coilcraft
RC0402FR-074K7L – Yageo
RC0402FR-07910RL – Yageo
RC0402JR-0782RL – Yageo
RC0402JR-078K2L – Yageo
RC0402JR-0739KL – Yageo
L5987TR – ST Microelectronics
LARA-R2 series
VCC
51
VCC
52
VCC
53
C2
GND
Design-in
Page 68 of 148