10
DEMO MANUAL DC2787A
Rev. 0
SCHEMATIC DIAGRAM
D D
C C
B B
A A
12V / 100A
NOTES: UNLESS OTHERWISE SPECIFIED,
1. CAPACITORS AND RESISTORS ARE 0603.
SER2011-202MLD
ON
RUN
OFF
40V~60V
APPROVEDECO
3 PROD 02/20/19
DATEREV
REVISION HISTORY
` `
DESCRIPTION
INTVCC1
VOUT
EXTVCC
VOUT
INTVCC1
VOUT
VIN
INTVCC1
VIN
INTVCC1
INTVCC1
VIN
VIN
VIN
VIN
VOUTA
RUN
TRACK/SS
ITH
VFB
CLKOUT1
FAULT
PGOOD
DATE:
IC NO.
SHEET OF
TITLE: DEMO CIRCUIT SCHEMATIC,
APPROVALS
PCBDES.
APPENG.
Phone:1‐408‐432‐1900
Milpitas,CA95035
1630McCarthyBlvd.
ForADICustomerUseOnly
CUSTOMER NOTICE
ANALOGDEVICESINC.HASMADEABESTEFFORTTODESIGNA
CIRCUITTHATMEETSCUSTOMER‐SUPPLIEDSPECIFICATIONS;
HOWEVER,ITREMAINSTHECUSTOMER'SRESPONSIBILITYTO
VERIFYPROPERANDRELIABLEOPERATIONINTHEACTUAL
APPLICATION.COMPONENTSUBSTITUTIONANDPRINTED
CIRCUITBOARDLAYOUTMAYSIGNIFICANTLYAFFECTCIRCUIT
PERFORMANCEORRELIABILITY.CONTACTANALOGDEVICES
INC.APPLICATIONSENGINEERINGFORASSISTANCE.
THISCIRCUITISPROPRIETARYTOANALOGDEVICESINC.AND
SUPPLIEDFORUSEWITHANALOGDEVICESINC.PARTS.
SCALE=NONE
SIZE:
SKU NO.
SCHEMATIC NO. AND REVISION:
PCABOM:
PCAASS'Y:
www.analog.com
41
` \
` `
LTC7821
DC2787A
700-DC2787A_REV03
705-DC2787A_REV03
N/A
Thursday, May 16, 2019
710-DC2787A_REV03
HIGH EFFICIENCY, POLYPHASE HYBRID STEP-DOWN
CONVERTER
DATE:
IC NO.
SHEET OF
TITLE: DEMO CIRCUIT SCHEMATIC,
APPROVALS
PCBDES.
APPENG.
Phone:1‐408‐432‐1900
Milpitas,CA95035
1630McCarthyBlvd.
ForADICustomerUseOnly
CUSTOMER NOTICE
ANALOGDEVICESINC.HASMADEABESTEFFORTTODESIGNA
CIRCUITTHATMEETSCUSTOMER‐SUPPLIEDSPECIFICATIONS;
HOWEVER,ITREMAINSTHECUSTOMER'SRESPONSIBILITYTO
VERIFYPROPERANDRELIABLEOPERATIONINTHEACTUAL
APPLICATION.COMPONENTSUBSTITUTIONANDPRINTED
CIRCUITBOARDLAYOUTMAYSIGNIFICANTLYAFFECTCIRCUIT
PERFORMANCEORRELIABILITY.CONTACTANALOGDEVICES
INC.APPLICATIONSENGINEERINGFORASSISTANCE.
THISCIRCUITISPROPRIETARYTOANALOGDEVICESINC.AND
SUPPLIEDFORUSEWITHANALOGDEVICESINC.PARTS.
SCALE=NONE
SIZE:
SKU NO.
SCHEMATIC NO. AND REVISION:
PCABOM:
PCAASS'Y:
www.analog.com
41
` \
` `
LTC7821
DC2787A
700-DC2787A_REV03
705-DC2787A_REV03
N/A
Thursday, May 16, 2019
710-DC2787A_REV03
HIGH EFFICIENCY, POLYPHASE HYBRID STEP-DOWN
CONVERTER
DATE:
IC NO.
SHEET OF
TITLE: DEMO CIRCUIT SCHEMATIC,
APPROVALS
PCBDES.
APPENG.
Phone:1‐408‐432‐1900
Milpitas,CA95035
1630McCarthyBlvd.
ForADICustomerUseOnly
CUSTOMER NOTICE
ANALOGDEVICESINC.HASMADEABESTEFFORTTODESIGNA
CIRCUITTHATMEETSCUSTOMER‐SUPPLIEDSPECIFICATIONS;
HOWEVER,ITREMAINSTHECUSTOMER'SRESPONSIBILITYTO
VERIFYPROPERANDRELIABLEOPERATIONINTHEACTUAL
APPLICATION.COMPONENTSUBSTITUTIONANDPRINTED
CIRCUITBOARDLAYOUTMAYSIGNIFICANTLYAFFECTCIRCUIT
PERFORMANCEORRELIABILITY.CONTACTANALOGDEVICES
INC.APPLICATIONSENGINEERINGFORASSISTANCE.
THISCIRCUITISPROPRIETARYTOANALOGDEVICESINC.AND
SUPPLIEDFORUSEWITHANALOGDEVICESINC.PARTS.
SCALE=NONE
SIZE:
SKU NO.
SCHEMATIC NO. AND REVISION:
PCABOM:
PCAASS'Y:
www.analog.com
41
` \
` `
LTC7821
DC2787A
700-DC2787A_REV03
705-DC2787A_REV03
N/A
Thursday, May 16, 2019
710-DC2787A_REV03
HIGH EFFICIENCY, POLYPHASE HYBRID STEP-DOWN
CONVERTER
C15
0.1uF
C59
2.2uF
100V
1210
Q1A
OPT
5
6
7
4
2
3
8
1
U1
LTC7821EUH
MODE/PLLIN
1
CLKOUT
2
RUN
3
FAULTB
4
PGOOD
5
TIMER
6
TRACK/SS
7
EXT_REF
8
ISENSE+
15
EXTVCC
16
ISENSE-
14
PGND
17
BG2
18
INTVCC
19
SW3
20
TG2
21
BG1
24
HYS_PRGM
9
ITH
10
FREQ
11
TEMP
12
VFB
13
BOOST3
22
BOOST2
23
MID
25
MIDSENSE
26
VINSENSE
27
VIN
28
SW1
29
TG1
30
BOOST1
31
NC
32
SGND
33
J3
VOUT
C23
+
C89
150uF
16V
12
C36
10uF
C3
2.2uF
100V
1210
D3
CMDSH-4E
21
+
C74
12
R6
1M
0805
C67
1210
R240
0
R10 0
Q1
BSZ070N08LS5
4
5
6
7
8
3
1
2
C31
10uF
1210
C63
C19
+
C153
12
R12
0
+
C68
12
R246
0
R15
100k
C73
Q24
OPT
4
5
6
7
8
3
1
2
E1
VIN
C45
27pF
+
C154
12
R5 0
E10
PLLIN
C24
1210
C26 2.2uF
R2
1
R250
OPT
L1 2uH
E4
EXTVCC
R31
OPT
+
C6
33uF
80V
12
E6
VO_SNS-
Q7
BSC014N04LSI
4
5
6
7
8
3
1
2
R9
10k
1%
C37 0.1uF
R25
4.32k
1%
C2
2.2uF
100V
1210
R20
0
J1
VIN
C48
OPT
C34
10uF
C105
2.2uF
1210
C8
0.22uF
SW1
1
2
3
4
5
6
C41
10uF
100V
1210
C72
R3
OPT
R7
1k
RN1
OPT
t°
+
C84
150uF
16V
12
C60
10uF
100V
C32
10uF
C20
D2
CMDSH-4E
2 1
J2
GND
R270
0
R226 0
C103
100V
R16
53.6k
1%
E2
GND
C255
4.7uF
C64
10uF
100V
C46
OPT
+
C97
150uF
16V
12
E13
FAULT
E14
RUN
C56
100V
C207
Q3
BSC032N04LS
4
5
6
7
8
3
1
2
C16
OPT
R33
0
C61
C39
4.7nF
+
C70
12
C25
C35
10uF
C256 4.7uF
0805
C208
R32
0
E5
VO_SNS+
C5
0.1uF
C71
2.2uF
1210
R1
1k
Q22
OPT
4
5
6
7
8
3
1
2
D1
CMDSH-4E
2 1
Q23
OPT
4
5
6
7
8
3
1
2
+
C1
33uF
80V
12
E11
PGOOD
R17
6.81k
0805
R23
60.4k
1%
C65
+
C44
150uF
16V
12
E3
GND
R8
34k
1%
+
C152
150uF
16V
12
R271
0
Q22A
OPT
5
6
7
4
2
3
8
1
C29
10uF
100V
R227
0
J4
GND
C43
10uF
100V
1210
C18
10uF
100V
1210
C58
2.2uF
100V
1210
R13
10k
1%
C62
1210
C27 1uF
C22
10uF
100V
+
C155
150uF
16V
12
Q5
BSC032N04LS
4
5
6
7
8
3
1
2
C33
10uF
100V
1210
Q25
OPT
4
5
6
7
8
3
1
2
C40
0.22uF
C10
10uF
100V
1210
+
C42
150uF
16V
12
C9
0.47uF
C66
R18
3.74k
+
C69
12
C81
10uF
100V
1210
+
C57
150uF
16V
12
C30
10uF
C4
0.1uF
C21
FAULT
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