DC2380A-C - Schematic

A
B
C
D
E
REVISION HISTORY
Place on edge of board
CLKOUT
E2
5VBIAS
R1
0
IAVG2
IAVG3
0
R12
R13
R14
0
0
0
TP6
0
0
TP7
10
11
33
VSNSOUT2 VSNSOUT3 VSNSOUT4
VSNSOUT1
R106
R107
R108
0
0
0
34
CIN3
CIN4
22uF
25V
1210
TP8
2
1
PWM
ZCD#
32
3
VCC
4
AGND
PGND
13
PGND
14
PGND
PGND
16
COUT1
COUT2
100uF
6.3V
1206
R34
0
R38
3.57K
1%
+
RUN4
C3-4
OPT
R3-4
OPT
2
1
ZCD#
PWM
3
VCC
4
32
AGND
AGND
5
BOOT
6
NC
SW
23
SW
22
SW
SW
21
20
SW
19
SW
18
SW
SW
24
VOS2+
C41
OPT
COUT6
COUT7
100uF
6.3V
1206
R56
0
VOS2+
R53
10
VOUT2
+
E11
OPT
COUT8
COUT9
COUT10
330uF
2.5V
12
13
R32
0 mOhm
2010
2
1
PWM
ZCD#
3
VCC
32
4
BOOT
AGND
AGND
VIN
PGND
PGND
GL
PGND
GL
U4
FDMF5820DC
PGND
15
R66
OPT
PVCC
PGND
14
PGND
VOS2-
R36
0 mOhm
2010
TP3
30
29
28
35
27
2
C27
2.2uF
16V
26
24
SW
VOS3+
C42
OPT
L3
COUT11
COUT12
100uF
6.3V
1206
R73
0
VOS3+
R71
10
VOUT3
0.25uH
744301025
R72
3.57K
1%
25
SW
R70
24.9K
+
TRK/SS4
C29
OPT
R76
R33
0 mOhm
2010
1
R37
0 mOhm
2010
E15
OPT
COUT13
COUT14
COUT15
330uF
2.5V
VOUT3+
J7
C28
10uF
0805
R79
0
VOS3E16
VOS3- OPT
VOS4+
C31
0.22uF
R81
OPT
1%
R77
10
VOUT4
C30
2.2uF
16V
R80
10K
PGND
PGND
-C
PWM
2
3
VCC
ZCD#
32
5
4
BOOT
AGND
6
NC
AGND
SW
SW
SW
1.2V/60A
GL
U5
FDMF5820DC
PGND
16
1.8V/60A
PGND
SW
15
-B
GL
23
14
PGND
PGND
22
13
VIN
SW
12
21
1.8V/30A 1.5V/30A 1.2V/30A 1.0V/30A
34
SW
CIN9
CIN10
22uF
25V
1210
VOUT4
SW
VOUT3
PVCC
20
-A
VOUT2
TMON
VIN
19
33
VOUT1
VIN
SW
11
R82
OPT
EN/FAULT#
18
10
E19
VIN
SW
9
17
R83
100K
PHASE
VIN
7
+
5VBIAS
SW
R84
10K
28
27
26
25
24
COUT18
COUT19
COUT20
330uF
2.5V
C34
2.2uF
16V
R86
24.9K
R85
OPT
C43
OPT
CUSTOMER NOTICE
L4
0.25uH
744301025
R87
3.57K
1%
1.2V/120A
R88
0
COUT16
COUT17
100uF
6.3V
1206
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
B
C
D
J9
VOUT41
VOS4E20
VOS4- OPT
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
APPROVALS
PCB DES.
HZ
APP ENG.
MIKE S.
TECHNOLOGY
LTC Confidential-For Customer Use Only
OUTPUT CURRENT
4 PHASE STEP-DOWN CONVERTER
LTC7851EUHH
DEMO CIRCUIT 2380A-C
IC NO.
N/A
SCALE = NONE
www.linear.com
Fax: (408)434-0507
TITLE: SCHEMATIC HIGH
SIZE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
A
VOUT4+
C33
10uF
0805
J10
30
35
VOS4+
E18
OPT
TP4
31
29
VOUT3-
J8
R74
OPT
0
FB4
VOUT2-
J6
R67
10K
31
SW
R75
VOUT2+
J5
C12
10uF
0805
E12
VOS2- OPT
R64
10K
SW
34
Murata GRM31CR60J107M (100uF, 6.3V, X5R, 1206)
COUT1,2,6,7,11,12,16,17:
1
23
33
VOS1-
3
0.25uH
744301025
R55
3.57K
1%
25
TMON
SW
OPT
VOUT1-
L1-4: Wurth 744301025 (0.25uH, DCR=0.325mOhms +/-7%)
L2
26
VIN
22
OPT
C1-4
27
VIN
SW
R69
11
CIN7
CIN8
22uF
25V
1210
RUN4
35
EN/FAULT#
SW
ILIM4
RUN3
R2-4
OPT
VIN
SW
9
10
C2-4
17
16
OPT
21
30
VOUT1+
1.2V / 120A
R49
10K
R52
24.9K
C10
2.2uF
16V
28
C22
0.22uF
C24
0.22uF
IAVG4 C26
J3
TP2
29
SW
C21
2.2uF
16V
20
32
0
C23
0.22uF
5
33
31
R62
NC
34
OPT
OPT
OPT
SW
35
TRK/SS3 C19
R61
ILIM3
IAVG3 C20
R35
0 mOhm
2010
0
6
36
VINVIN-
30
SW
R59
R60
VIN+
7V - 14V
VOS1+
J4
R58
OPT
PHASE
37
PGND
J1
CIN2
180uF
16V
COUT3-5,8-10,13-15,18-20: Panaasonic EEFSX0E331ER (330uF, 2.5V, 9mOhms)
31
SW
OPT
OPT
OPT
OPT
R1-4
OPT
VSNSOUT4
7
8
IAVG4
38
PHASE
VIN
ISNS4P
39
PGND
15
C14
0.22uF
C15
IAVG2
R57
ILIM2
C16
TRK/SS2
C17
U3
FDMF5820DC
PGND
14
7
VSNSN4
40
13
R48
OPT
GL
19
RB-4 VOS4OPT
R31
0 mOhm
2010
R45
10K
PGND
8
50
49
PWM2
PGOOD1
52
51
ISNS4N
VSNSP4
C7
2.2uF
16V
GL
8
JP4
RUN2
ISNS3N
VSNSOUT4
41
12
+
Sanyo 16SVP180MX (180uF, 30mOhms, 3.02A, 16V)
C5
10uF
0805
E8
PGND
SW
C32
OPT
53
ISNS3P
VSNSOUT3
42
C13
0.22uF
COMP4
2
3
RUN1
VSNSN3
OPT
R78
OPT
1
PWM1
IAVG3
VIN
RUN4 OPT
CLKOUT
VSNSP3
44
43
43.2K
100pF
CIN1
180uF
16V
VIN+
VOS1-
PVCC
SW
RT-4
OPT
56
ILIM3
RB-3 VOS3OPT
TRK/SS4
E17
COUT3
COUT4
COUT5
330uF
2.5V
1
PGND
18
VOS4+
RT-3
OPT
55
TRACK/SS3
COMP3
SGND
VOS3+
E14
54
FB3
59
R68
100K
PGOOD4
24
E6
R29
10
VOUT1
0.25uH
744301025
25
SW
VIN
VIN
19
PGOOD2
45
R51
C11
DATE
10-21-15
VOS1+
C40
OPT
L1
26
SW
TMON
SW
18
5VBIAS
TRACK/SS4
27
EN/FAULT#
17
17
VCC
2
PGOOD3
35
SW
VIN
16
R2-3
OPT
16
C2-3
OPT
VINSNS
47
46
ILIM1
IAVG1
34
CIN5
CIN6
22uF
25V
1210
ILIM4
VSNSOUT3
C3-3
OPT
C1-3
OPT
R1-3
OPT
TRACK/SS2
FB2
PGOOD3
R3-3
OPT
R65
OPT
1%
15
COMP2
48
29
RUN3
ILIM2
28
13
IAVG2
VSNSP2
RUN3
12
VSNSN2
27
11
FB3
COMP3
C1-2
OPT
9
10
ISNS2P
PWM3
COMP2
FB2
ISNS1N
VSNSOUT2
PGOOD4
JP3
C18 1uF
8
14
2
C25
OPT
C2-2
OPT
7
PWM4
3
VOS2-
IAVG1
ISNS1P
ISNS2N
RUN4
OFF
RB-2
OPT
ILIM1
SGND
TRACK/SS4
ON
1
R3-2
OPT
R63
OPT
RUN3 OPT
R2-2
OPT
R1-2
OPT
6
24
VIN
RT-2
OPT
VSNSOUT1
5
20
E13
C3-2
OPT
4
33
Mike S.
CIN3-10: Murata GRM32ER71E226K (22uF, 16V, X5R, 1210)
R28
24.9K
C4
2.2uF
16V
28
GL
VIN
11
U1
LTC7851EUHH
VSNSN1
23
TRK/SS3
VOS2+
VSNSP1
3
VCC
1
VSNSOUT2
2
RB-1 VOS110.0K
22
R54
RT-1
10.0K
COMP1
FREQ
FB1
VOS1+
5VBIAS
1
COMP4
COMP1
VIN
10
RUN1 RUN2
CLKIN
220pF
E10
TRACK/SS3
30
R47
0
9
58
PGOOD2
TRK/SS1
2.2nF
C2-1
R50
100K
0
C8
0.22uF
C1-1
R2-1
4.12K
5VBIAS
3
R44
30.9K
26
R46
OPT
1%
57
C9
OPT
TRACK/SS1
3
2
C6
OPT
FB4
OFF
CIN1,2:
0
R42
R3-1
332
3.3nF
R1-1
10.0K
RUN2
25
R43
OPT
R41
Fsw = 400kHz
FB1
C3-1
21
1
VSNSOUT1
APPROVED
4
TP1
29
GL
U2
FDMF5820DC
E3
E5
R39
10
VIN
JP2
1
6
VIN
PGND
15
RUN2 OPT
OFF
5
PVCC
R40
ON
ON
NC
TMON
VIN
PGND
12
DESCRIPTION
PRODUCTION
J2
TRK/SS2
E9
2
R11
10K
31
EN/FAULT#
VIN
E7
TRACK/SS2
7
VIN
BOOT
9
R9
OPT
1
PGOOD1
TP5
TRK/SS4
R27
IAVG4
5VBIAS
R30
100K
TRK/SS3
R26
SW
0
IAVG1
TRK/SS2
R25
+
23
FB4
ILIM4
R24
R7
10K
SW
0
0
0
ILIM3
R23
22
JP1
R21
ILIM2
R22
TRK/SS1
SW
C3
OPT
0
21
R19
R20
10k
1%
R18
0
20
OFF
3
2
R17
0
ILIM1
FB3
RUN1
R16
0
SW
R15
18.2K
R6
0
19
ON
1
R5
0
FB2
4
RUN1
R4
C1
2.2uF
16V
C2
0.22uF
SW
R10 0
RUN4
18
VIN
FB1
RUN3
8
E4
OPT
RUN2
VIN
R8
RUN1
COMP4
PHASE
VCC
TRK/SS1
COMP3
0
SW
TRACK/SS1
COMP2
R3
SW
COMP1
REV
__
VIN
Components to parallel two or more phases
17
Place these components on edge of board
ECO
1
0
AGND
R2
SW
CLKIN
E1
DATE:
Tuesday, February 09, 2016
E
SHEET 1
REV.
2
OF 2
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