DC2380A-B - Schematic

A
B
C
D
E
REVISION HISTORY
Place on edge of board
CLKOUT
E2
5VBIAS
R1
OPT
0
R13
R14
OPT
0
TP7
VIN
10
11
33
VSNSOUT2 VSNSOUT3 VSNSOUT4
VSNSOUT1
R106
R107
R108
0
OPT
0
34
CIN3
CIN4
22uF
25V
1210
TP8
2
1
PWM
ZCD#
32
3
VCC
4
AGND
6
5
PVCC
VIN
PGND
13
PGND
15
PGND
16
SW
RUN4
C3-4
OPT
R3-4
OPT
2
1
ZCD#
PWM
3
VCC
4
32
AGND
AGND
5
BOOT
6
NC
24
SW
SW
23
SW
22
SW
SW
21
20
SW
19
SW
18
SW
SW
COUT1,2,6,7,11,12,16,17:
VOS2+
C41
OPT
R53
10
VOUT2
COUT6
COUT7
100uF
6.3V
1206
R56
0
+
R32
OPT
2010
R64
10K
13
2
1
PWM
ZCD#
3
VCC
32
4
BOOT
AGND
AGND
VIN
PGND
PGND
GL
PGND
GL
U4
FDMF5820DC
PGND
15
5
PVCC
PGND
14
R66
OPT
PGND
J5
C12
10uF
0805
VOS2E12
OPT
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
E15
R71
10
VOUT3
0.25uH
744301025
R72
3.57K
1%
25
SW
R70
24.9K
C29
OPT
+
R33
0 mOhm
2010
1
R37
0 mOhm
2010
COUT13
COUT14
COUT15
330uF
2.5V
VOS3+
J7
C28
10uF
0805
E16
R79
0
VOS3-
VOS3-
VOS4+
C31
0.22uF
R81
OPT
1%
R77
10
VOUT4
C30
2.2uF
16V
R80
10K
PGND
PGND
PGND
-C
1.2V/120A
PWM
2
1
3
VCC
ZCD#
32
5
6
4
BOOT
AGND
AGND
GL
U5
FDMF5820DC
PGND
SW
SW
SW
15
1.2V/60A
GL
SW
14
PGND
PGND
23
13
VIN
22
1.8V/60A
12
SW
1.8V/30A 1.5V/30A 1.2V/30A 1.0V/30A
34
21
CIN9
CIN10
22uF
25V
1210
SW
VOUT4
16
-B
VOUT3
PVCC
SW
-A
VOUT2
TMON
VIN
20
33
VOUT1
VIN
19
11
EN/FAULT#
SW
10
E19
VIN
18
9
NC
7
VIN
R83
100K
PHASE
8
+
R82
OPT
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%
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
VOUT4-
E20
VOS4- OPT
1
VOS4-
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
APPROVALS
PCB DES.
HZ
APP ENG.
MIKE S.
TECHNOLOGY
TITLE: SCHEMATIC
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+
1.2V / 60A
VOUT3-
J8
R74
10
0
FB4
VOUT2-
J6
R36
OPT
2010
TRK/SS4
R76
VOUT2+
COUT8
COUT9
COUT10
330uF
2.5V
R67
10K
31
SW
R75
VOS2+
E11
OPT
1
SW
12
Murata GRM31CR60J107M (100uF, 6.3V, X5R, 1206)
3
0.25uH
744301025
R55
3.57K
1%
25
23
34
VOS1-
L1-4: Wurth 744301025 (0.25uH, DCR=0.325mOhms +/-7%)
L2
26
TMON
SW
33
R1-4
OPT
VSNSOUT4
27
VIN
22
OPT
C1-4
35
VIN
SW
OPT
VOUT1-
R49
10K
R52
24.9K
C10
2.2uF
16V
28
EN/FAULT#
SW
R69
11
CIN7
CIN8
22uF
25V
1210
RUN4
R2-4
OPT
VIN
SW
9
21
ILIM4
RUN3
17
16
OPT
10
C2-4
29
SW
C21
2.2uF
16V
20
30
C24
0.22uF
IAVG4 C26
VOUT1+
1.8V / 60A
TP2
C22
0.22uF
NC
32
0
C23
0.22uF
SW
33
31
R62
6
34
OPT
43.2K
100pF
J3
J4
VOS2-
PHASE
35
TRK/SS3 C19
R61
ILIM3
IAVG3 C20
VINVIN-
Sanyo 16SVP180MX (180uF, 30mOhms, 3.02A, 16V)
C5
10uF
0805
R35
0 mOhm
2010
0
19
RB-4 VOS4OPT
7
8
IAVG4
36
PHASE
VIN
ISNS4P
37
VIN+
7V - 14V
30
SW
R59
R60
5VBIAS
PGOOD4
COUT3
COUT4
COUT5
330uF
2.5V
R58
OPT
7
VSNSN4
38
PGND
8
50
49
PWM2
PGOOD1
ISNS4N
39
U3
FDMF5820DC
PGND
OPT
OPT
OPT
OPT
COMP4
2
JP4
52
ISNS3N
VSNSOUT4
OPT
R78
OPT
C32
OPT
51
ISNS3P
VSNSOUT3
40
GL
PGND
14
15
C14
0.22uF
C15
IAVG2
R57
ILIM2
C16
TRK/SS2
C17
PGND
SW
3
RUN2
VSNSN3
41
13
GL
17
OFF
53
IAVG3
42
C13
0.22uF
12
J1
CIN2
180uF
16V
COUT3-5,8-10,13-15,18-20: Panaasonic EEFSX0E331ER (330uF, 2.5V, 9mOhms)
31
PGND
SW
1
RUN1
VSNSP3
VIN
RUN4 OPT
PWM1
ILIM3
RB-3 VOS310k
TRK/SS4
E17
ON
RT-4
OPT
CLKOUT
TRACK/SS3
COMP3
44
43
43.2K
100pF
R48
OPT
PVCC
SW
VOS4+
RT-3
10.0K
56
FB3
SGND
VOS3+
E14
55
PGOOD2
59
R68
100K
54
VCC
VSNSP4
R31
0 mOhm
2010
R45
10K
PGND
18
19
C7
2.2uF
16V
VIN
VIN
18
5VBIAS
TRACK/SS4
+
E8
TMON
SW
17
VINSNS
45
R51
C11
+
VOS1-
EN/FAULT#
17
R2-3
4.99K
16
C2-3
100pF
TRACK/SS2
FB2
2
PGOOD3
COUT1
COUT2
100uF
6.3V
1206
R34
0
R38
3.57K
1%
VIN
16
VSNSOUT3
C3-3
3.3nF
C1-3
2.2nF
R1-3
10.0K
COMP2
47
46
ILIM1
IAVG1
34
CIN5
CIN6
22uF
25V
1210
ILIM4
R3-3
332
R65
10k
1%
15
ILIM2
PGOOD3
RUN3
IAVG2
VSNSP2
48
29
13
VSNSN2
28
12
ISNS2P
RUN3
11
FB3
COMP3
C1-2
OPT
9
10
VSNSOUT2
27
COMP2
FB2
ISNS1N
PWM3
C18 1uF
8
IAVG1
ISNS2N
PGOOD4
C2-2
OPT
7
ILIM1
SGND
PWM4
VOS2-
33
ISNS1P
26
JP3
RB-2
OPT
14
2
C25
OPT
6
RUN4
3
R2-2
OPT
R1-2
OPT
VSNSOUT1
5
20
OFF
RT-2
OPT
R3-2
OPT
R63
18.2K
RUN3
ON
C3-2
OPT
VIN
4
TRACK/SS4
TRK/SS3
E13
1
24
1
VIN
11
U1
LTC7851EUHH
VSNSN1
24
VOS2+
VSNSP1
3
VCC
1
VSNSOUT2
2
RB-1 VOS110.0K
23
R54
RT-1
20.0K
COMP1
FREQ
FB1
VOS1+
5VBIAS
1
COMP4
COMP1
VIN
10
RUN1 RUN2
CLKIN
100pF
E10
TRACK/SS3
0.25uH
744301025
25
R47
0
9
22
PGOOD2
1.5nF
C2-1
R50
100K
0
C8
0.22uF
C1-1
R2-1
6.98K
5VBIAS
3
R44
30.9K
TRK/SS1
58
JP2
R46
OPT
1%
57
C9
OPT
TRACK/SS1
3
2
C6
OPT
FB4
OFF
26
SW
CIN1
180uF
16V
VIN+
VOS1+
E6
R29
10
VOUT1
L1
0
R42
R3-1
332
3.3nF
R1-1
10.0K
RUN2
21
1
R41
Fsw = 400kHz
FB1
C3-1
25
R43
OPT
RUN2 OPT
ON
27
SW
R40
VSNSOUT1
DATE
10-21-15
VOS1+
R39
10
VIN
Mike S.
CIN3-10: Murata GRM32ER71E226K (22uF, 16V, X5R, 1210)
C40
OPT
R28
24.9K
C4
2.2uF
16V
35
GL
U2
FDMF5820DC
PGND
14
APPROVED
4
CIN1,2:
30
28
E3
E5
TP1
29
GL
PGND
DESCRIPTION
PRODUCTION
J2
TRK/SS2
E9
1
BOOT
TMON
VIN
E7
TRACK/SS2
2
R11
10K
31
VIN
PGND
12
R9
OPT
EN/FAULT#
SW
R12
TP6
0
9
IAVG4
0
TP5
R30
100K
0
IAVG3
TRK/SS4
R27
+
23
5VBIAS
PGOOD1
OPT
IAVG2
TRK/SS3
R26
R7
10K
SW
0
IAVG1
TRK/SS2
R25
22
JP1
R21 0
FB4
ILIM4
R24
SW
C3
OPT
R20
10k
1%
ILIM3
R23
7
ILIM2
R22
FB3
TRK/SS1
21
R19 OPT
2
R18
0
20
OFF
3
RUN1
R17
OPT
SW
R15
18.2K
R16
0
19
ON
1
R6
0
ILIM1
4
RUN1
R5
OPT
NC
FB2
R4
0
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:
LTC Confidential-For Customer Use Only
HIGH OUTPUT CURRENT
4 PHASE STEP-DOWN CONVERTER
LTC7851EUHH
DEMO CIRCUIT 2380A-B
IC NO.
N/A
SCALE = NONE
www.linear.com
Fax: (408)434-0507
Wednesday, January 27, 2016
E
SHEET 1
REV.
2
OF 2
A
B
C
D
E
4
4
DYNAMIC LOAD CIRCUIT FOR VOUT1 AND VOUT2
TO-263 = D2PAK
E22
Q1
SUM60N02-3m9P
TO-263
PULSE GEN A
E24
GND
BIAS SUPPLY FOR DrMOS and LTC7851
VOUT1
Q2
SUM60N02-3m9P
TO-263
OPT
R93
10k
1%
VOUT1
VIN
3
VOUT2
C37
2.2uF
16V
J12
R90
OPT
2512
VOUT2
9
2
4
J13
LOAD STEP A
2mV / Amp
5% DUTY CYCLE MAX.
R95
0.002
1%
2512
L5
22uH
CDRH4D22/HPNP-220MC
U6
LT3970EMS
J11
R89
0 mOhm
2512
5VBIAS
R97 100K
5
VIN
SW
PG
BOOST
EN
BD
GND
FB
GND
RT
6
C35
0.1uF
R91
C39
22pF
R92
1.0M
7
C36
10uF
6.3V
0805
0
1206
5VBIAS E21
C38
10uF
6.3V
0805
8
5V / 350mA
E23
5V / 350mA
1
R94
316K
10
R98
226K
GND
11
3
3
5VBIAS
1
ON
TO-263 = D2PAK
E25
Q3
SUM60N02-3m9P
TO-263
TO-263
PULSE GEN B
E26
GND
Q4
SUM60N02-3m9P
TO-263
OPT
R103
10k
1%
R104
0.002
1%
2512
2
2
3
OFF
DYNAMIC LOAD CIRCUIT FOR VOUT3 AND VOUT4
R100
OPT
JP5
VOUT3
R101
0 mOhm
2512
R99
OPT
J14
VOUT3
VOUT4
J15
R102
OPT
2512
VOUT4
J16
LOAD STEP B
2mV / Amp
5% DUTY CYCLE MAX.
VOUT1
+
COUT23
COUT22
COUT21
OPT
7343-D15T
VOUT2
+
COUT26
COUT24
COUT25
OPT
7343-D15T
+
COUT28
COUT29
COUT27
OPT
7343-D15T
VOUT3
+
COUT31
COUT30
COUT32
OPT
7343-D15T
+
VOUT4
COUT34
COUT35
COUT33
OPT
7343-D15T
+
COUT37
COUT36
COUT38
OPT
7343-D15T
+
COUT39
COUT41
COUT40
OPT
7343-D15T
+
COUT43
COUT42
COUT44
OPT
7343-D15T
2
1
1
CUSTOMER NOTICE
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.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
APPROVALS
PCB DES.
HZ
APP ENG.
MIKE S.
TECHNOLOGY
TITLE: SCHEMATIC
SIZE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
A
B
C
D
N/A
SCALE = NONE
DATE:
IC NO.
www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
HIGH OUTPUT CURRENT
4 PHASE STEP-DOWN CONVERTER
LTC7851EUHH
DEMO CIRCUIT 2380A-B
Tuesday, January 19, 2016
SHEET 2
E
REV.
2
OF 2
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