DC542A - Schematic

1
2
3
4
5
6
7
8
REVISION HISTORY
ECO
REV
DESCRIPTION
PROTO
4
C1
1000pF
R2
75
R4
75
DATE
APPROVED
01/06/03
E1
A
PGOOD
A
C40
C8
R9
VIN+
SHT 2
0.01uF
10
6
S
0.01uF
100pF
S
S
7
0.01uF
8
ITH1
9
E7
S
10
11
ITH2
E8
12
C18
R16
10K
R17
10K
0.1uF
13
C30
S
C27
C29
3
3.3V
2
2.5V
1
JP4
R18
15k
R19
30.1k
14
PLLFLTR
VIN
PLLIN
BG1
FCB
EXTVCC
ITH1
INTVCC
SGND
PGND
3.3VOUT
ITH2
BG2
BOOST2
VOSENSE2
SW2
TG2
SENSE2SENSE2+
100pF
RUN/SS2
1
J4
23
Q3
Si7860DP
4
22
C17
4.7uF
21
20
Q4
Si7860DP
4
+ C16
15uF
10V
3216
D4
B340B
R13
0.003
S1
+ C13
150uF
6.3V
+ C14
150uF
6.3V
+ C15
150uF
6.3V
J3
R34
C19
0
0.47uF
18
Q6
Si7888DP
4
16
R28
optional
Q7
Si7888DP
4
R14
0.003
L21.4uH
SW2
Q8
Si7860DP
Q9
Si7860DP
4
VO2+
R15
optional
D5
B340B
+ C22
150uF
6.3V
+ C23
150uF
6.3V
+ C24
150uF
6.3V
R20 0
C36
10uF
10V
1210
J6
BG2
R22 75
S
S2
R23
4.75k
SHT 2
VO2+
S
J5
15
S
C31
470pF
OPT
VO1-
5V/3.3V
0A to 12A
470pF
S
B
C35
10uF
10V
1210
TG2
19
17
VO1+
5
6
7
8
24
1
2
3
C25
S
VIN+
VO1+
R12
optional
C20 0.1uF
1000pF
2
1
2
3
1
2
3
BG1
R33 0
25
4
1000pF
C62
2. 2uFJ2
VINL11.4uH
2
E6
SW1
BOOST1
C59
2. 2uF
1
C39
VOSENSE1
C11
SW1
C12
0.47uF
1
2
3
5
C38
C28
SENSE1-
27
26
C10
2.2uF 2. 2uF
5
6
7
8
4
28
1
2
3
S
PLLFLTR E5
TG1
5
6
7
8
3
PGOOD
SENSE1+
5
6
7
8
0.1uF
LTC3728EG
RUN/SS1
1
2
3
2
5
6
7
8
U1
1
C26
C44
2. 2uF
Q2
Si7888DP
4
1
2
3
E4
B
Q1
Si7888DP
4
RUN1
5
6
7
8
5
6
7
8
S
5
6
7
8
S
J1
8V to 24V
2
1
2
+ C61
56uF
25V
TG1
S
R10 3.01K
2
R24
0
2
0.22uF
D3
BAT54A
1
2
3
R1
INTVcc 3
1M
JP6
0 1
1
0
3
1
C6
0.22uF
1
JP1
3
E3
C5
2
FCB
C4
0.1uF
+
1
C3
1.0uF
35V
CASE B
2
PLLIN
3.3VOUT
+ C60
56uF
25V
VIN+
1
R8
2
10K 1%
1
0.01uF
2
S
1
S
E2
3.3V/2.5V
0A to 12A
C32
1000pF
VO2-
R31
optional
R25 75
C
C
S
SENSE2+ E12
R26 10
R29
R27 4.75k
C42
36.5k
JP5
2
SENSE1+
3
5.V
3.3V
1
S
0.1uF
C34
C33
470pF
R30
24.9k
S
470pF
OPT
E13
S
R32 10
C41
0.1uF
E14
S
RUN2
JP7
1
EXTVCC
E15
S
0
R3
2
3
1
1M
EXTVCC
R21
100K
SHT 2
D
C21
1uF
INTVCC
UNLESS OTHERWISE SPECIFIED
DIMENSIONS ARE IN INCHES
TOLERANCE ON ANGLE - - 2 PLACES - - - 3 PLACES - - INTERPRET DIM AND TOL
PER ASME Y14.5M -1994
SHT 2
E18
INTVCC
E9
SGND
THIRD ANGLE PROJECTION
E10
CONTRACTNO.
APPROVALS
DRAWN MEI
DATE
06-10-02
CHECKED
TECHNOLOGY
TITLE
D
SCH, LTC3728EG, DUAL 2-PHASE SYNCHRONOUS STEPDOWN REGULATOR
APPROVED
SGND
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
ENGINEER
E11
SIZE CAGE CODE
DESIGNER
SGND
DWG NO
REV
4
DC542A
Custom
S
DO NOT SCALE DRAWING
1
2
3
4
5
Monday, January 06, 2003
6
SCALE:NONE
FILENAME: 542A-4.DSN
7
SHEET
1
8
OF
2
REVISIONHISTORY
ECO
REV
DESCRIPTION
4
DATE
PROT O
01/06/03
APPROVED
.
OPTIONAL BIAS CIRCUIT
L3 4.7uH
OPT
D7
SHT 1
INTVCC
1
2
MURATA LQH32CN4R7 M01L
B0520LW
OPT
SHT 1
1
EXTVCC
2
1
C7
10uF
10V
1210
OPT
C2
470pF
OPT
R36
37.4K
OPT
OPT
SWVIN
B0520LW
SD
OPT
2
VO1+SHT 1
JP83
U3
D6
GNDFB
VO1+
2
5
VIN+
4
R11
VIN+SHT 1
OPT
3
LT1613CS5
1
10K
OPT
C43
4.7uF
10V
1206
OPT
IF VIN < 5V
R35
11.0K
1%
OPT
NOTE:
Iout (max)=200mA
For input voltage of 3.3V
VO1+
+ C45
+ C46
optional
+ C47
optional
+ C48
optional
+ C49
optional
+ C50
optional
optional
+ C51
optional
VO2+
+ C52
+ C53
optional
UNLESS OTHERWISE SPECIFIED
DIMENSIONS ARE IN INCHES
TOLERANCE ON ANGLE - - 2 PLACES - - - 3 PLACES - - INTERPRET DIM AND TOL
PER ASME Y14.5M - 1994
THIRD ANGLE PROJECTION
+ C54
optional
+ C55
optional
+ C56
optional
CONTRACTNO.
APPROVALS
DRAWN M E I
CHECKED
DATE
06-07-02
+ C57
optional
TECHNOLOGY
optional
+ C58
optional
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
TITLE
SCH, LTC3728EG, DUAL 2-PHASE SYNCHRONOUS STEP-
APPROVED
DOWN REGULATOR
ENGINEER
DESIGNER
SIZE
CAGECODE
A
DO NOT SCALE DRAWING
Monday, January 06, 2003
SCALE:NONE
DWGNO
REV
4
DC542A
FILENAME: 542A-4.DSN
SHEET
2
OF
2
Similar pages