DC2253A - Schematic

5
4
3
2
1
REVISION HISTORY
ECO
REV
__
DESCRIPTION
1
PGOOD1
C35
3.3uF
50V
(OPT)
1210
C14
3.3uF
50V
(OPT)
1210
C62
2.2uF
50V
1206
+
C63
2.2uF
50V
1206
VOS+
CIN1
270uF
50V
VIN1+
TP11
G
2
TP5
ITH1
R9
100
3
R10
100
C11
68pF 4
ITH1
TP6
3
OFF
OPT
CC1 100pF
RUN
D8
BZX84C5V1
41.2K
CC2
RC
0.01uF
10K
6
7
R21
R31
12.1K
8
10K
INTVCC1
R75
OPT
9
INTVCC1
R22
OPT
C7
OPT
10
C8
OPT
11
12
PLLIN1
R24
10K
13
R25
0
R16 1K
B
R14
100
R13
100
VOUT
PLLIN1
TP10
5
C10
SS
PGOOD
SW1
SENSE1+
TG1
SENSE1-
BOOST1
ITH
SGND
MODE/PLLIN
PGND
BG1
VIN
FREQ
INTVCC
RUN
EXTVCC
VINSNS
VOUTSNS
BG2
BOOST2
ILIM
TG2
IOSENSE+
SW2
IOSENSE-
TRIM
27
R17 0
26
R23 0
25
R11
C4
0.22uF
16V
0
23
D4
DFLS160
R27 0
22
INTVCC1
24
21
C24 1uF
16V
20
19
C12
(OPT)
1206
G
D
L1 3uH
CIN2
270uF
50V
D5
B340A
Q9
Q5
BSC010NE2LS
J2
GND
VOUT
R2 0.003
C32
C31
C30
C29
C23
(OPT)
1210
C64
C65
2.2uF
1206
25V
1W
2512
VOUT
J3
+ COUT1
330uF
25V
+ COUT2
12V @ 25A MAX
R8
10
VOS+
330uF
25V
VOS+
TP2
R66
(OPT)
C
VOS-
TP1
C13
(OPT)
R29
(OPT)
GND
J4
G
C18 10uF
6.3V
D7
DFLS160
R1 0
GND
TP7
IREF1
XAL1580-302ME
Q4
BSC027N04LS
Q7 (OPT)
D6
6V - 36V
18
C22
0.22uF
16V
17
16
15
4.7uF
R26 10
0805
VIN1+
EXTVCC
14
VFB
S
CSS
0.1uF
SS
28
D
1
S
CF1 OPT
B340A
S
LTC3789EGN
SS
R28
(OPT)
1206
Q3
BSC010NE2LS
Q8
(OPT)
G
D
Q2
Q6
BSC027N04LS
U1
C28
C21
C20
C19
C17
C16
22uF
16V
1210
R65
(OPT)
S
VFB1
CF
OPT
VOUT1
D
RFB1
113K
RFB2 8.06K
5.1
C15
0.1uF
50V
VIN
J1
+
R5
SGND
JP1 VIN1+
RUN
1
R30
ON
2
VIN1+
D
TP4
R15
DATE
5/6/2014
VIN
R20 0
C9
C25
C26
C27
3.3uF
50V
1210
R7
100K
C
Jeoffrey W.
TP3
INTVCC1
D
APPROVED
PRODUCTION
VOUT
B
R18
0.006
2W
0805
EXTVCC1
R32
0.006
2W
R6 OPT
TP12
R12 OPT
R4
100
R3 100
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE IN OHMS, 0603.
ALL CAPACITORS ARE IN MICROFARADS, 0603.
A
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.
2. INSTALL SHUNTS AS SHOWN.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
2
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
HZ
Jeoffrey W.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: SCHEMATIC
HIGH EFFICIENCY 2-PHASE BUCK-BOOST CONVERTER
SIZE
N/A
SCALE = NONE
DATE:
IC NO.
LTC3789EGN
DEMO CIRCUIT 2253A
Monday, May 12, 2014
SHEET 1
1
REV.
1
OF 3
A
5
4
3
2
1
INTVCC2
R50
100K
TP20
VIN2+
VIN
R33 0
C37
C56
C45
C54
3.3uF
50V
1210
D
VOS+
C36
3.3uF
50V
(OPT)
1210
C41
3.3uF
50V
(OPT)
1210
C66
2.2uF
50V
1206
CIN4
270uF
50V
C67
2.2uF
50V
1206
+
+
CIN3
270uF
50V
D
VIN2+
R58
2
ITH1
R53
R69
0
C
Run
R54
100
3
100
C51
68pF 4
CC4 100pF
R72
CC3
0.01uF
0
5
RC1
6
10K
7
R44
10K
INTVCC2
INTVCC2
R63
OPT
R74
OPT
8
9
C33
OPT
10
C34
OPT
11
12
13
R34
10K
PLLIN2
R62
0
R45 1K
B
R41
100
R40
100
VOUT
C38
14
VFB
PGOOD
SS
SW1
SENSE1+
TG1
SENSE1ITH
SGND
MODE/PLLIN
FREQ
RUN
VINSNS
VOUTSNS
BOOST1
PGND
BG1
VIN
INTVCC
EXTVCC
BG2
BOOST2
ILIM
TG2
IOSENSE+
SW2
IOSENSE-
TRIM
28
27
R43 0
26
R48 0
25
R51
0
23
D12
DFLS160
R57 0
22
INTVCC2
24
20
G
D11
B340A
6.3V
D13
DFLS160
R460
C55 1uF
16V
19
D
VOUT
R59 0.003
C48
C50
C47
C49
C46
(OPT)
1210
C68
C69
2.2uF
25V
1206
1W
2512
+ COUT3
330uF
16V
+ COUT4
330uF
16V
3uH
Q14
Q15
BSC010NE2LS
C
C59
(OPT)
R60
(OPT)
G
18
C52
0.22uF
16V
17
16
15
VOUT
R55 10
0805
B
R35
0.006
2W
0805
EXTVCC
R73
L2
D10
B340A
C53
C44
C42
C40
C43
C58
22uF
16V
1210
XAL1580-302ME
Q12
BSC027N04LS
Q13
(OPT)
C57 10uF
21
4.7uF
VIN2+
C5
0.22uF
16V
C60
(OPT)
1206
S
1
Q10
BSC010NE2LS
Q11
(OPT)
G
D
R68 OPT
R61
(OPT)
1206
S
G
S
CF3 OPT
CSS1
0.1uF
LTC3789EGN
D
U2
R67
0
SS
R76 0
Q16
Q17
BSC027N04LS
D
RFB4 (OPT)
CF2
OPT
VOUT2
S
RFB3
(OPT)
5.1
C39
0.1uF
50V
VFB1
R64
0.006
2W
(OPT)
R38 OPT
R39 OPT
R37 100
R70
R36 100
R71
OPT
0
NOTE: UNLESS OTHERWISE SPECIFIED
IREF1
1. ALL RESISTORS ARE IN OHMS, 0603.
ALL CAPACITORS ARE IN MICROFARADS, 0603.
A
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.
2. INSTALL SHUNTS AS SHOWN.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
2
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
HZ
Jeoffrey W.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: SCHEMATIC
HIGH EFFICIENCY 2-PHASE BUCK-BOOST CONVERTER
SIZE
N/A
SCALE = NONE
DATE:
IC NO.
LTC3789EGN
DEMO CIRCUIT 2253A
Wednesday, May 14, 2014
SHEET 2
1
REV.
1
OF 3
A
5
4
3
2
1
D
D
INTVCC1
U3
LTC6908CDCB-1
1
2
C61
0.1uF
3
MOD
V+
OUT2
GND
OUT1
6
5
PLLIN2
4
PLLIN1
C
7
C
SET
GND
R56
499K
B
B
CUSTOMER NOTICE
APPROVALS
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APP ENG.
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
A
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
TECHNOLOGY
HZ
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
Jeoffrey W. TITLE: SCHEMATIC
HIGH EFFICIENCY 2-PHASE BUCK-BOOST CONVERTER
SIZE
IC NO.
LTC3789EGN
DEMO CIRCUIT 2253A
N/A
SCALE = NONE
3
DATE:
Tuesday, May 06, 2014
2
SHEET 3
1
REV.
1
OF 3
A
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