DC2000A - Schematic

4
INTVCC
E1
1
2
20K
E3
4
JP1
PHASMD
120 90 60
DEG DEG DEG
1
4
INTVCC
PLLIN
RUN1
2
C1
OPT
2
REV
__
CLKOUT
RUN1
ON
5
1
REVISION HISTORY
ECO
4
1
SW1
RUN1
R2
OPT
2
3
RUN1
R1
VIN
3
MODE
PS BM CCM
3
5
DESCRIPTION
2
APPROVED
DATE
JIAN L.
9-30-13
PRODUCTION
E2
JP2
VIN
R3
OPT
E4
OFF
VIN+
D
6
3
D
J1
R29
OPT
C21
0.1uF
R30
OPT
OPT
TK/SS2
C19
220nF
VOUT1
TRSET1
1
2
2
5
6
7
8
1
2
3
5
6
7
8
COUT3
100uF
6.3V
1210
COUT1
100uF
6.3V
1210
+ COUT2
330uF
2.5V
7343
+ COUT4
C10
10uF
10V
330uF
2.5V
7343
J3
VOUT1
1.0V / 30A
J4
GND
C
INTVCC
EXTVCC
C13
1uF
0.25uH
744301025
DCR = 0.32m OHM
VO1_SNS-
R20 10
VIN
C14
4.7uF
E8
VO1_SNS-
10V
23
D2
R23
22
0 C18
21
20
CMDSH-3
CIN5
10uF
1210
E9
R24 10
Q3
BSC050NE2LS
4
0.1uF
TG2
CIN4
10uF
1210
INTVCC
L2
SW2
BG2
R28
INTVCC
4
100K
VO2_SNS+
VO2_SNS+
VOUT2
VOUT2
Q4
BSC010NE2LSI
COUT7
100uF
6.3V
1210
0.33uH
744301033
DCR = 0.32m OHM
COUT8
100uF
6.3V
1210
COUT5
+ 330uF
2.5V
7343
J5
VOUT2
COUT6
+ 330uF
2.5V
7343
C20
10uF
10V
1.5V / 30A
J6
GND
R34
4.64k
1%
VO2_SNS-
R36 10
R35
931
1%
E11
VO2_SNS-
C22
1uF
E13
GND
VO1_SNS+
1
2
3
VIN
2.2
25
Q2
BSC010NE2LSI
4
R18
5
6
7
8
32
31
CLKOUT
33
34
RUN1
PHASMD
PGOOD
INTVCC
CMDSH-3
26
24
R16 10
VOUT1
5
6
7
8
TCOMP1
36
37
38
35
ILIM
MODE/PLLIN
0
BG1
VIN-
E7
VO1_SNS+
R32
100K
1%
EXTVCC
B
TRSET1
TCOMP1
39
SNS1-
R31
OPT
EXTVCC
E12
SW2
27
R17
D1
19
SGND/PGND
TG2
28
GND
E6
L1
0.1uF
TG1
J2
R12
715
1%
C7
30
29
CIN2
10uF
1210
R11
3.57k
1%
4.5V - 14V
+
1
2
3
TRK/SS2
BOOST2
SNS2-
R27
R26 0
BG2
SNSA2+
ENTMPB
41
TK/SS2
18
E10
C17
OPT
10
C16
220nF
VOSNS2-
ENTMPB
VO2_SNS-
R22
OPT
EXTVCC
IFAST
R25
20k
9
INTVCC
VOSNS2+
RUN2
VO2_SNS+
C15
OPT
ITH2
17
8
TK/SS2
R21
30.1k
BOOST1
VIN
16
7
TG1
BG1
IFAST
6
VFB2
1%
SW1
CIN1
270uF
16V
+
Q1
BSC050NE2LS
4
SW1
ITH1
FREQ
5
U1
LTC3875EUJ
VOSNS1-
CIN3
10uF
1210
CLKOUT
15
ITH2
VOSNS1+
ILIM
TRSET2
R19 10K
C
ITH2
4
14
C12
1.5nF
ITH1
VIN
INTVCC
3.01K
R10
1K
TRSET2
3
C11 150pF
TAVG
C9
220pF
13
2
TK/SS1
TAVG
C8 1.5nF
1
TK/SS1
SNSD1+
ITH1
TCOMP2
C6
OPT
220nF
12
R14
20k
220nF
VFB1
TCOMP2
C5
OPT
R9
R7
OPT
C4
SNSA1+
VO1_SNS-
R13
13.3k
CIN12
270uF
16V
1
2
3
R8
OPT
C3
VO1_SNS+
R15
10.7K
1%
R5
OPT
SNSD2+
C2
0.1uF
11
0 R6
OPT
40
TRK/SS1
TK/SS1
R4
1
VIN
VIN
E5
E15
RUN2
B
E14
PGOOD
PGOOD
JP3 ENTMPB
1
OFF
2
TRSET1
3 ON
R37 10k
R33
TRSET2
R40 10k
TG1
RUN2
ON
C26 OPT
5
OFF
TCOMP1
C25
OPT
R45
OPT
TG2
SW2
R39
OPT
BG1
SET R33=60K ohm FOR FAST TRANSIENT RESPONSE @ VOUT2
TG2
SW2
BG2
CUSTOMER NOTICE
C24
OPT
R42
OPT
RN2
OPT
SW1
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.
1
RN4
OPT
1
R41
OPT
1
RN1
OPT
2
C23
OPT
2
2
2
BG1
BG2
2
R38
OPT
1
VIN
TCOMP2
A
RN3
OPT
SW1
R44 OPT
4
1
SW2
RUN2
R43 5k
6
3
TAVG
OPT
TG1
TITLE: SCHEMATIC
HIGH EFFICIENCY, DUAL-OUTPUT SYNCHRONOUS BUCK
CONVERTER WITH VERY LOW DCR INDUCTOR
SIZE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
TECHNOLOGY
HZ
JIAN L.
4
3
2
N/A
SCALE = NONE
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
DATE:
IC NO.
REV.
LTC3875EUJ
2
DEMO CIRCUIT 2000A
Monday, October 07, 2013
SHEET 1
1
OF 2
A
5
4
3
2
1
OPTIONAL JUMPERS FOR SINGLE OUTPUT/DUAL PHASE OPERATION
R48
VO2_SNS-
OPT
R51
TK/SS2
OPT
R54
RUN1
OPTIONAL 5.5V BIAS
VIN
RUN2
OPT
1
ITH2
OPT
2
C27
10uF
16V
JP5
FOR DUAL PHASE OPERATION, REMOVE R24, R36, R21, R25, AND SHORT VOUT1 AND VOUT2.
BIAS
VIN
R52
10K
TG2
8
4
3
2
1
LOAD STEP CIRCUIT 1
Q6
FDMS3620S
OPT
1
+
8
COUT9
330uF
7343
+
COUT10
330uF
7343
C29
100uF
6.3V
1210
9
7
6
5
5
6
7
9
9
7
6
5
BG2
J8
1
SW2
OPTIONAL 3mm x 3mm Dual-MOSFETs
VIN
COUT11 COUT12 C33
+
100uF
330uF
OPT
6.3V
7343
7343
1210
TG2
4
7
BG1
BG2
R56
0.005
2512
9
J10
IOUT2
2
1
C34
OPT
6.3V
1210
1
C36
0.22uF
3
4
7
GND
J9
VOUT2
B
C35
0.22uF
RJK0305DPB
Q8
5
4
3
2
3
IO1STEP CLK
E17
R55
10K
E18
4
R57
10K
3
2
1
2
1
E16
1
+
C
VOUT1
4
C32
0.22uF
CIN9
OPT
8
9
8
CIN8
OPT
TG1
C31
0.22uF
VOUT2
VIN
Q10
FDPC8011S, OPT
C30
OPT
6.3V
1210
RJK0305DPB
Q7
5
4
3
2
SW1
J7
1
VOUT1
2
3
4
5
1
5
6
2
IOUT1
Q9
FDPC8011S, OPT
C28
10uF
16V
2
3
4
5
Q12
FDMS3620S
OPT
8
B
4
SHDN ADJ
D
OPT
R50
34.8K
1%
CIN7
OPT
2
3
4
4
3
2
CIN11
OPT
BG1
7
GND
EXTVCC
R47
5
TG1
8
9
IN
+5.5V
VIN
CIN6
OPT
Q5
FDMS3620S
OPT
2
3
4
CIN10
OPT
1
LT1761ES5-SD
5
OUT
1
OPTIONAL 5mm x 6mm Dual-MOSFETs
C
3
R49
10K
ON
OFF
Q11
FDMS3620S
OPT
U2
VIN
3
2
1
ITH1
R53
TK/SS1
5
VO1_SNSD
VFB2
OPT
3
R46
VFB1
IO2STEP CLK
E19
GND
R58
0.005
2512
10
6
5
10
6
5
LOAD STEP CIRCUIT 2
CUSTOMER NOTICE
SW1
SW2
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.
A
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
HZ
JIAN L.
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, DUAL-OUTPUT SYNCHRONOUS BUCK
SIZE
N/A
SCALE = NONE
2
DATE:
IC NO.
REV.
LTC3875EUJ
2
DEMO CIRCUIT 2000A
Monday, October 07, 2013
SHEET 2
1
OF 2
A
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