DC1349A - Schematic

5
4
VIN
RUN1
VIN+
12 VFB2
ITH2
VFB3
C7
1500pF
C46
R39
0
41 PGND
R5
43.2K
R33
10.0K
R6
20.0K
TK/SS2
R34
20.0K
(Opt)
C9
1500pF
1000pF
1000pF
1000pF
TK/SS3
(Opt)
C44
0.01uF
E10
A
EXTVCC
(5.5Vmax)
C40
0.1uF
R62
100K
PGOOD12
PGOOD3
E17
E18
PGOOD12
1
2
3
S2P
PGOOD3
OPTIONAL COMPONENTS FOR
SINGLE OUTPUT/DUAL PHASE
OPERATION
SEE QUICK START GUIDE
R66
ITH1
(Opt)
R26
100
(Opt)
0603
TK/SS1
R67
VFB2
(Opt)
(Opt)
(Opt)
R24
100
SENS2P
R23
100
SENS1N
R22
100
R68
(Opt)
COUT4
100uF
6.3V
+
X5R
COUT5
330uF
2.5V
SANYO
+
COUT6
330uF
2.5V
SANYO
E3
C48
1uF
6.3V
X5R
GND
E4
(Opt)
0603
SENS2N
VO2-
SENS2P
E24
S2P
TG3
S1N
CIN6
OPT
4
Q9
RJK0305DPB
SW3
B
S3P
4
L3
0.78uH
IHLP-4040DZ-11
Q10
OPT
S1P
R21
100
4
OPTIONAL DCR SENSING
Q11
RJK0330DPB
R59
R57
(Opt)
0603
4
Q12
VO3+
S3N
RSNS3
0.002
VOUT3
COUT7
100uF
6.3V
(Opt)
0603
X5R
COUT8
+ 330uF
4V
SANYO
COUT9
+ 330uF
4V
SANYO
R58
E25
VOUT3
2.5V / 15A
E5
C49
1uF
6.3V
X5R
GND
E6
(Opt)
0603
SENS3N
VO3-
SENS3P
OPT
E26
OPT DCR SENSE3
WHEN DCR SENSING IS IMPLEMENTED
SHORT RSNS1, RSNS2 AND RSNS3
TK/SS2
DO NOT STUFF R21-R26
A
CUSTOMER NOTICE
RUN2
INTVCC
R60
VINF
VOUT1
4.5V < VIN < 5.5V
CONTRACT NO.
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.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
4
RSNS2
0.002
VIN
CIN5
10uF
16V
X5R
S2N
ONLY
5
VOUT2
S3P
R25
100
(Opt)
VFB12
E23
OPT DCR SENSE2
R64
VIN
VOUT2
1.2V / 15A
(Opt)
0603
OPT
VIN
NOTE:
R63
ITH2
R56
VO2+
S2N
L2
0.47uH
IHLP-4040DZ-11
INTVCC
R61
100K
VO1E22
C
Q8
1
2
3
EXTVCC
GND
Q6
OPT
4
RJK0330DPB
S3N
BG3
INTVCC
5
4
Q7
SENS2N
SENS1P
X5R
CIN4
OPT
R54
BG3 21
0
R36
C47
1uF
6.3V
R55
SENS3P
R9
13K
1
2
3
1
2
3
RUN3 34
RUN1 36
38
C23
COUT3
330uF
2.5V
SANYO
SENS1N
4
5
E14
C22
C8
330pF
C45
R35
TK / SS3
C21
CIN3
10uF
16V
X5R
4
D3
C26
0.1uF CMDSH-3
TG3 19
SW3 20
SENS3N
TK / SS2
E15
C3
(OPT)
TG2
BG2
R29
4.7
PGOOD3 16
PGOOD3
11 SGND
+
VIN
1
2
3
(Opt)
VOUT3
B
23 EXTVCC
PGOOD12 17
PGOOD12
COUT2
330uF
2.5V
SANYO
SENS1P
SW2
BOOST3 18
EXTVCC
SENSE3-
R32
20.0K
15 ITH3
VOUT3
C25
D2
0.1uF CMDSH-3
BG2 28
3
E16
R28
4.7
8
TK/SS1
TK / SS1
R8
10K
VIN
Q5
RJK0305DPB
TG2 26
SW2 27
SENSE3+
R31
24.9K
+
SW1
BOOST2 25
14 VFB3
COUT1
100uF
6.3V
X5R
OPT DCR SENSE1
TG1
BG1
BG1 30
13 ITH2
C6
220pF
VOUT3
Q4
OPT
RJK0330DPB
5
VFB2
VOUT1
1.8V / 15A
E1
E2
(Opt)
0603
1
2
3
R4
20.0K
10 ITH1
SENSE2-
(Opt)
(Opt)
ITH1
7
R46
C43
JP3
C2
47pF
R3
10.0K
TG1 32
SW1 31
6
3
4
Q3
C24
D1
0.1uF CMDSH-3
VO1+
E21
R52
R27
4.7
9 VFB1
RUN3
2
OFF
4
R53
RSNS1
0.002
(Opt)
0603
5
R38
0
(Opt)
VIN 24
INTVCC 22
DRVCC12 29
BOOST1 33
2 TK/SS3
SENSE2+
R45
RUN3
1
R51
(Opt)
0603
1
2
3
TK/SS3
16V
VOUT1
S1N
5
TK/SS2
VOUT2
E13
U1
LTC3853EUJ
SENSE1-
VIN
RUN3
40 TK/SS1
1 TK/SS2
RUN3
5
TK/SS1
RUN2 35
R7
15K
FREQ
C4
C5
1500pF 330pF
5
(Opt)
MODE 37
R2
20.0K
R44
C42
(Opt)
S1P
L1
0.56uH
IHLP-4040DZ-11
Q2
OPT
D
VIN-
E20
4
C11
4.7uF
RUN2
ILIM 39
3
JP2
4
Q1
RJK0305DPB
INTVCC
RUN1
R50
OPT
RUN2
SENSE1+
(Opt)
R47
2.55K
MODE
4
RUN2
1
ON
2
OPT
C1
22pF
1
2
3
R1
24.9K
R43
+
GND
5
R49
E12
CIN7
180uF
16V
1
2
3
VIN
RUN2
VIN
6.5V - 14V
E7
E8
C10
0.1uF
R65
0
CIN2
OPT
5
INTVCC
CIN1
10uF
16V
X5R
VIN
5
R40
1K
C50
1000pF
R10
2.2
1
2
3
E9
VFB12
VINF
R48
10.0K
5
4
SYNC
R37
0
C
400kHz
E19
VIN
VIN
5
VOUT1
D
ON
INTVCC
MODE
JP4
(Opt)
VIN
1
2
3
3
R42
C41
(Opt)
JP1
BURST/SYNC
FORCE CONTINUOUS
RUN1
3
2
5
(Opt)
PULSE SKIP
1
2
3
R41
2
OFF
1
1
RUN1
1
OFF
2
INTVCC
MODE
E11
ON
3
3
2
APPROVALS
DRAWN
AntoninaK
DATE
10/26/07
CHECKED
TECHNOLOGY
TITLE
LTC3853EUJ High Current Polyphase
3-Output Step-Down Supply with Tracking
APPROVED
ENGINEER Johan Stydom
10/26/07
DESIGNER
Monday, September 08, 2008
SIZE
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
CAGE CODE
SCALE:
DWG NO
REV
DC1349A
FILENAME:
SHEET
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