Figure 38. Power Supply Schematic Diagram - ST STM32L476G-EVAL User Manual

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Figure 38. Power supply schematic diagram

U31
ZEN056V130A24LS
L2
CN22
1 1 3 1
SV CV
2
3 2
SG CG1
DC-10B
CG2
Z1
CG3
SMAJ5.0A-TR
C124
100nF BNX002-01
E5V
JP17
TP10
U5V 8 7
5V
6 5
+5V
U5V_STLINK 4 3
R165 1
2 1
1K
D5V
Header 4X2
TP8
VREF+
VDDA
1 VDDA
VDD_MCU L1
2
3 BEAD
+3V3
C60
JP10 C59
1uF 100nF
connected by shunt of
IDD_measurement circuitry
GND GND
1 VDD VDD_MCU
+3V3
2
3
VDD_ADJ
TP5
VDD
JP2
TP2
VDD_USB
1 VDD_USB
VDD_MCU
2
3
+3V3
JP1
TP4
VDD_IO
VDD_IO
JP3
VDD_MCU
Header 2X1
Recommendation:
100nF decoupling capacitor for each VDD pin
VDD_MCU VDD_IO
C46
C48 C41 C50 C38 C51 C43
C42 C45 C32
100nF 100nF 100nF 100nF 100nF 100nF 1uF 100nF 100nF 1uF
U28
+5V ST1L05BPUR
E5V 6
VI
3
1
C100 EN
4
220uF
5
6 R206
C116
[N/A]
4.7uF
TP1 TP11 TP18 TP3
LD7
Red
2 U34
+5V ST1L05BPUR
6
VI
1
EN
C140
R240
U7B
4.7uF
32 31 [N/A]
VREF+ VREF-
33 30
VDDA VSSA
72 71
VDD VSS
108 107
VDD VSS
144 143
VDD VSS
39 38
VDD VSS
17 16
VDD VSS
52 51
VDD VSS
62 61
VDD VSS
84 83
VDD VSS
121 120
VDD VSS
106
VDDUSB
95 94
VDDIO2 VSS
131 130 U27
VDDIO2 VSS
+3V3 LD1117S18TR
6 3
VBAT Vin Vout
Tab
STM32L476ZGT6U
VDD
JP12
1
2 BT1
3 + -
CR1220 holder
to use a supercapacitor:
remove the jumper, and connect positive terminal
of the supercapacitor to pin 2 of the jumper.
VDD_USB
C33
C35 C36
100nF 1uF 100nF
TP17
R202
3 +3V3
PG
+3V3
[N/A]
4
VO
Power Supply 3.3V
5 R204 Vout=1.22*(1+R1/R2)
ADJ
20.5K[1%] C98
C101 10uF[ESR<0.2ohm]
100nF
R203 11.8K[1%]
Power Supply VDD_ADJ [1.7V to 3.61V]
Vout=1.22*(1+R1/R2)
TP13
R234
3 VDD_ADJ
PG
VDD_ADJ
[N/A]
4
VO
5 R236
ADJ
20K[1%]
R235 C133 C131
100nF 10uF[ESR<0.2ohm]
10.2K[1%]
RV1 2
3386P-503H[5%]
TP16 TP12
1V8 U26 3V6
+1V8 +5V LD1117STR +3V6
2 3 2
Vin Vout
4 4
Tab
C107
R207
10uF
124[1%]
C99
10uF
R209 C114
232[1%] 100nF
Vout=1.25*(1+232/124)=3.589V
Title: Power
Project: STM32L476G-EVAL
Size: A3 Reference: MB1144
Date: 6/24/2015
Revision: B-02
Sheet: 7 of 25