LISA-U2 series - System integration manual
UBX-13001118 - R27
System description
Page 23 of 183
C1-Public
and the components listed in
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 2.5
A current pulses, transforming a 12 V supply input.
LISA-U2 series
12V
R5
C6
C1
VCC
INH
FSW
SYNC
OUT
GND
2
6
3
1
7
8
C3
C2
D1
R1
R2
L1
U1
GND
FB
COMP
5
4
R3
C4
R4
C5
62
VCC
63
VCC
61
VCC
Figure 7: Suggested low cost solution for the VCC voltage supply application circuit using a step-down regulator
Reference
Description
Part Number - Manufacturer
C1
22 µF Capacitor Ceramic X5R 1210 10% 25 V
GRM32ER61E226KE15
–
Murata
C2
100 µF Capacitor Tantalum B_SIZE 20% 6.3V 15m
T520B107M006ATE015
–
Kemet
C3
5.6 nF Capacitor Ceramic X7R 0402 10% 50 V
GRM155R71H562KA88
–
Murata
C4
6.8 nF Capacitor Ceramic X7R 0402 10% 50 V
GRM155R71H682KA88
–
Murata
C5
56 pF Capacitor Ceramic C0G 0402 5% 50 V
GRM1555C1H560JA01
–
Murata
C6
220 nF Capacitor Ceramic X7R 0603 10% 25 V
GRM188R71E224KA88
–
Murata
D1
Schottky Diode 25V 2 A
STPS2L25
–
STMicroelectronics
L1
5.2 µH Inductor 30% 5.28A 22 m
MSS1038-522NL
–
Coilcraft
R1
4.7 k
Resistor 0402 1% 0.063 W
RC0402FR-074K7L
–
Yageo
R2
910
Resistor 0402 1% 0.063 W
RC0402FR-07910RL
–
Yageo
R3
82
Resistor 0402 5% 0.063 W
RC0402JR-0782RL
–
Yageo
R4
8.2 k
Resistor 0402 5% 0.063 W
RC0402JR-078K2L
–
Yageo
R5
39 k
Resistor 0402 5% 0.063 W
RC0402JR-0739KL
–
Yageo
U1
Step-Down Regulator 8-VFQFPN 3 A 1 MHz
L5987TR
–
ST Microelectronics
Table 8: Suggested components for low cost solution VCC voltage supply application circuit using a step-down regulator