DC1807A - Schematic

1
2
3
4
5
6
7
8
REVISION HISTORY
ECO
INTVCC
DATE
YI S.
03/24/11
2
4
3
1
E5
JP3
VIN+
NOTE:SET RSENSE FILTER TIME CONSTANT O .6nH/RSENSE FOR 2010 PACKAGE.
R1
SYNC
J1
CIN1
180uF
16V
OPT
R48
4.5V - 14V
+
J2
2
VIN
GND
0
C37
R27
OPT
30.1k
E6
VIN
R26
RUN1
VIN-
OPT
1
2
3
C38
JP1
R28
R29
[2]
OPT
R30
[2]
Q1
BSC050NE2LS
OPT
CIN2
CIN4
10uF
1210
OPT
1210
Q5
OPT
5
6
7
8
OFF
5
6
7
8
ON
U1
R31
[2]
C42
R32
20k
VFB1
4
100pF
R33
20k
VFB2
5
ITH2
6
C43
VOUT1
R34
E10
220pF
R35
OPT
R36
ITH1
3
C44
TRK/SS2 7
1.5nF
RUN2
[2]
0
VIN
OPT
BG1
VFB1
VIN
VFB2
INTVCC
ITH2
BG2
TK/SS2
10
PGND
RUN2
BOOST2
ILIM
12
TG2
EXTVCC
13
C47
BOOST1
ITH1
11
TK/SS2
R37
TK/SS1
SW2
PGOOD
0.1uF
R38
RUN2
ON
OFF
3
C48
R41
OPT
OPT
D1
R9
0
INTVCC
21
CMDSH-3
VINF
20
C11
2.2
INTVCC
0.1uF
E2
C49
R43
OPT
20k
J4
GND
B
5
6
7
8
E12
VIN
0
Q3
BSC050NE2LS
CMDSH-3
14
9 S2+
C21
4
C15
0.1uF
CIN3
CIN5
10uF
1210
OPT
1210
Q7
OPT
4
E13
VL2-
VO2+
L2 [2]
[2]
RS2
S2-
J5
VSW2
R40
[2]
Q8
OPT
4
VOUT2
R51
[2]
S2+
[2]
R62
[2]
R53
2010
S2-
COUT4
100uF
1210
COUT5 COUT6
+ 330uF + 330uF
2.5V
2.5V
7343
7343
OPT
VOUT2
1.2V / 15A
C36
4.7uF
6.3V
0805
J6
GND
E14
BSC010NE2LS
VO2C
R54
R44
OPT
GND
S1-
VIN
Q4
OPT
1.5V / 15A
D2
R25
8
C32
4.7uF
6.3V
0805
VO1-
4
INTVCC
VOUT1
COUT3
+ 330uF
2.5V
7343
OPT
4.7uF 0805
17
15
R47
S1+
Q2
BSC010NE2LS
2010
COUT2
+ 330uF
2.5V
7343
INTVCC
18
16
4
R61
[2]
COUT1
100uF
1210
R18
C17
19
R39
[2]
R42
C
SENSE2-
29
OPT
1
2
JP2
SENSE2+
4
23
22
Q6
OPT
[2]
5
6
7
8
1.5nF
TG1
0.1uF
1
2
3
C41
B
RUN1
24
1
2
3
2
VOUT1
R45
[2]
1
2
3
27
SW1
C20
5
6
7
8
RUN1
FREQ
VSW1
[2]
J3
28 S1+
5
6
7
8
26
[2]
SENSE1+
1
2
3
0.1uF
MODE/PLLIN
5
6
7
8
OPT
25
R10
RS1
1
2
3
C2
VO1+
L1 [2]
1
5
6
7
8
R2
SENSE1-
1
2
3
0
TRK/SS1
E11
VL1-
4
1
2
3
C14
R3
SGND
E9
4
1
2
3
S1-
LTC3869EUFD
TK/SS1
A
VIN
VIN
C1
1
0
APPROVED
1ST PROTOTYPE
MODE
10.0K
A
DESCRIPTION
1
PS BM CCM
R4
E1
REV
0
E3
INTVCC
EXTVCC
EXTVCC
C50
R46
1uF
100K
E4
VINF
OPTIONAL JUMPERS FOR
SINGLE OUTPUT/DUAL PHASE
OPERATION
INTVCC
PGOOD
PGOOD
R60
R49
ITH1
OPT
ITH2
OPT
R50
VFB1
STUFF R60 WITH 0 OHMS FOR
4.6V<VIN<5.5V
VFB2
OPT
R52
TRK/SS1
NOTES:UNLESS OTHERWISE SPECIFIED.
[2]
ASSY
FSW
-A
R SENSE
-B
DCR SENSE
400kHz
300kHz
R10
102k
75k
1
X2
OPT
R55
L1, L2
VITEC 59PR9875, 0.4uH
VISHAY IHLP4040DZ11, 0.56uH
RS1, RS2
0.002
0
R45, R51
R61, R62
R29, R30, R39, R40
C14, C15
C41, C44
CUSTOMER NOTICE
R31, R35
OPT
OPT
100
1nF
1nF
5.9k
1.58k
0
OPT
220nF
1.5nF
5.9k
CONTRACT NO.
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
APPROVALS
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. MI
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
ENG. YI S.
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.
3
TOOLING HOLES
TECHNOLOGY
4
5
6
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: SCHEMATIC
DUAL PHASE / DUAL OUTPUT SYNCHRONOUS
BUCK CONVERTER
SIZE
N/A
2
RUN2
OPT
3. ALL CAPACITORS AND RESISTORS ARE 0603.
1
X1
TRK/SS2
RUN1
1. DO NOT APPLY LOAD FROM THE VO1+ TO VO1- OR FROM THE VO2+ TO VO2- TURRETS.
THESE ARE ONLY INTENDED TO KELVIN SENSE THE OUTPUT VOLTAGE ACROSS COUT1
AND COUT4.
D
1
DATE:
7
IC NO.
REV
LTC3869EUFD
DEMO CIRCUIT 1807A
Friday, March 25, 2011
SHEET
8
1
1 OF 1
D
Similar pages