DC2263A - Schematic

5
4
3
2
1
REVISION HISTORY
TP9
VDD25 GND
VDD25
GND
TP2
2
2
VDD33
C9
1uF
VDD33
Q3
0
C48
4.7uF
5
8
SYNC
11
ALERTB
26
ITH1
5
ITH0
28
TSNS1
40
TSNS0
25
ITH0
VSENSE0+
TSNS1
VSENSE0-
10
1
2
3
22
33
ISNS0-
SW0
36
BG0
R13
6
ISNS0+
ISNS0-
1
VSENSE0+
2
VSENSE0-
23
MMBT3906LT1G
C38
+ C10
330uF
D3L
6.3V
24
SHARE_CLK
16
17
R42
10K
18
19
VDD33
20
21
BOOST1
SHARE_CLK
SW1
Q1
BG1
ASEL0
ISNS1+
ASEL1
ISNS1VOUT0_CFG
VSENSE1
C43
+ 330uF
D3L
OPT
6.3V
C42
+ 330uF
D3L
OPT
6.3V
GND
R25
0
GND_SNS
VIN
R76
30
TG1
31
BOOST1
29
+ C29
330uF
D3L
6.3V
*
4
WP
TP4
TP16
RUN1
TG1
100uF
1210
C1
SW1
BG1
3
ISNS1+
4
ISNS1-
C18
22uF
C27
22uF
J5
GND
100nF
VOUT1
VOUT1
L1
R10
2
Q7
OPT
*
J6
*
VOUT1
2512
8
C24
C32
R1
4
*
R7
R6
*
*
R30
*
R9
0
C20
100uF 100uF
1210 1210
ADJ., MAX 25A
100uF
1210
TP3
BSC010NE2LSI
VSENSE1
C
TP20
GND
5
6
7
1
R56
0
2
32
27
ADJ., MAX 25A
VOUT0_SNS
*
BSC050N02LS
TSNS0
RUN0
R8
0
J4
R14
VSENSE0+
C23
*
*
*
*
7
100uF
1210
100uF
1210
R34
R29
*
J3
VOUT0
C25
C34
C22
10
14
RUN0
R5
OPT
BG0
ISNS0+
BOOST0
39
1
2
3
15
RUN1
MMBT3906LT1G
R45
0
LTC3887EUJ
ITH1
37
R15
*
VOUT0
*
2512
VSENSE0-
C14
10nF
Q6
SW0
TG0
5
C12
10nF
Q5
ALERT
BOOST0
U1
SYNC
38
R16
Q2
VOUT1_SNS
1
2
3
C
SDA
TG0
VOUT0
*
Q8
OPT
3
*
L2
5
10
SDA
R4
*
SCL
D
8
VOUT1_CFG
FREQ_CFG
GPIO1
PHAS_CFG
GPIO0
GND
VDD25
R11
13
*
+ C11
330uF
D3L
6.3V
C21
12
*
PGND
C15
47pF
R3
9
SCL
1210
R2
VDD33
*
INTVCC
C16
47pF
C7
1210
22uF
2
BSC010NE2LSI
Q4
4
VIN
C8
3300F
22uF
C28
5
6
7
1
100nF
R39
10K
VDD25
*
R40
10K
35
R69
R57
10K
C19
4
C2
R59
2
R41
10K
01-20-16
VIN
BSC050N02LS
R71
GND
DATE
YS
9
C17
0.22uF
4
2
APPROVED
OPT
3
C35
C36
OPT
1210
PRODUCTION
D1
1
2
3
J2
D2
1
C3
C6
OPT
1210
C13
150uF
35V
+
7V - 14V
DESCRIPTION
2
EXTVCC_DRV
C5
4.7uF
0805
VDD25
VIN
REV
__
R60
INTVCC
R52
ECO
TP24
VIN
J1
D
INTVCC/EXTVCC
TP7
1
VIN
TP25
9
TP23
4
VDD33
TP1
5
GND
R12
C4
*
+ C30
330uF
D3L
6.3V
C45
+ 330uF
D3L
OPT
6.3V
C44
+ 330uF
D3L
OPT
6.3V
*
R26
*
VSENSE0+
R18
OPT
R32
OPT
R67
OPT
R73
OPT
R74
OPT
34
R17
OPT
B
41
VDD33
B
R43
10K
R44
10K
R24
OPT
R23
OPT
R22
OPT
R21
OPT
R20
OPT
R19
OPT
SGND AND PGND CONNECTED AT
A SINGLE NODE NEAR U1
GPIO0B GPIO1B
SGND
TP10
CURRENT SENSE CONNECTIONS
VOUT0
VOUT1
R38
R46
A
*
*
R49
*
R50
*
*
CONFIGURATION
-A: DUAL OUTPUT RSENSE
U1
3887EUJ#10C9
-B: DUAL PHASE DCR SENSE 3887EUJ#10CA
R1,R2 R7,R15
OPT
OPT
845
0
R6,R29 R10,R16
R11,R13
R30,R34
0
OPT
0.001
0
R12,R14 C21,C22 C4,C38
100
100
1nF
OPT
0
845
0.22uF 1uF
R3
R4
C7
3300pF
3.32K OPT
OPT
CUSTOMER NOTICE
0.22uH
OPT
OPT OPT OPT OPT OPT OPT OPT OPT OPT OPT OPT OPT
0
0.19uH
0
OPT OPT OPT OPT OPT OPT OPT OPT OPT OPT OPT OPT
APPROVALS
TECHNOLOGY
LT
YS
TITLE: SCHEMATIC
SIZE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
4
3
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
DUAL-PHASE/DUAL OUTPUT STEP-DOWN DC/DC CONVERTER
WITH POWER SYSTEM MANAGEMENT
N/A
1. ALL RESISTORS AND CAPACITORS ARE 0603.
5
R38,R46,R49,R50 R17 R24 R18 R23 R32 R22 R67 R21 R73 R20 R74 R19
OPT
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
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
NOTE: UNLESS OTHERWISE SPECIFIED
L1,L2
R26,R69
6.49K 6.49K
SCALE = NONE
2
DATE:
IC NO.
LTC3887EUJ
REV.
2
DEMO CIRCUIT 2263A
Wednesday, January 20, 2016
SHEET 1
1
OF 2
A
5
4
3
2
1
ALL PARTS ON THIS PAGE ARE FOR DEMO BOARD ONLY, NOT NEEDED IN CUSTOMER DESIGN
TP11
GPIO1B
SDA
SHARE_CLK
SCL
SYNC
GPIO1B
JP1
TP22
TP5
TP6
TP19
TP21
3
SYNC
D
ALERTB
SDA
SCL
2
ALERTB
R77 OPT
1
R84
OPT
C
NC
GPIO0-GPIO1
SHARE_CLK
TP12
D
GPIO0B
R79 0
GPIO0B
R82
OPT
D7
OPT
D6
OPT
TP14
RUN0
R80 0
100nF
R36
4.99K
U2
2
3
4
A1
WP
A2
SCL
VSS
SDA
RUN1
C
NC
RUN0-RUN1
OPT
RUN1
VDD33
R37
4.99K
1
2
3
4
5
6
7
8
9
10
11
12
13
14
J8 DEMO HEADER (M)
J7
VIN
7
EEWP
6
EESCL
5
EESDA
R28
10K
R27
10K
SW2
RUN1
ON
3V3
SW1
RUN0
R64
10
5
2
5
C33
10nF
VDD33
3
2
2
VIN
C
R92
OFF
DEMO HEADER (F)
Q19
TP0101K
R63
10
ON
OFF
R86
OPT
1206
8 AUXVCC
TP8
SGND
FAULTB
CTRL
ALERTB
SDA
SHARE_CLK
SCL
RESETB
AUXP
UNUSED
UNUSED
GND
GND
12V
12V
4
1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
6
3
C
VCC
R81
4
1
FAULTB
CTRL
ALERTB
SDA
SHARE_CLK
SCL
RESETB
AUXP
UNUSED
UNUSED
GND
GND
12V
12V
C31
A0
RUN0
TP13
1
VDD33
TO DC1613A
1
R62
OPT
R51
0
R96
OPT
6
3
AUXP
SDA
GND
SCL
LGKPWR
ALERTB
GPIO_1
OUTEN_0
OUTEN_1
GND
AUXSCL
AUXSDA
JP2
3
1
2
3
4
5
6
7
8
9
10
11
12
1
J10
3V3
2
3V3
10K
C26
10nF
R93
15.8k
VIN
24LC025-I/ST
R31
OPT
R33
OPT
TP17
GND
3V3
3V3
2
3V3
R53
200
R54
200
ALERTB
B
5
1
1
C54
1uF
0805
GND
R68
0.01
2512
8
IOUT
TST
C40
1uF
2
3
4
5
10K
TP15
7
J9
1
2
3
R58
SHDN
NC
GND
GND
GND
SENSE/ADJ
VIN
OUTPUT
2
1
1
4
3
C49
4.7uF
EXTVCC_DRV
Q12
GPIO0B
1
D5
ALERTB
RED
2N7002A
Q13
1
GPIO1B
1
6
3
OFF
4
2N7002A
R55
127
LT1129CS8-5
2
5
3
TP18
2
2
ON
1
U3
Q15
RJK0305DPB
PULSE IN
D4
GPIO1
GREEN
2
R61
100K
3
VOUT1
D3
GPIO0
GREEN
3
JP3
EXTVCC_DRV
R100 OPT
DO NOT EXCEED 5% DUTY CYCLE!
TP0101K
Q14
2
2
VOUT0
DYNAMIC LOAD CIRCUIT
B
1
VIN
R101 0
NOTE:
PULSE OUT
10mV / AMP
J11
C41
2.2uF
0805
2
3
4
5
A
J12
VOUT0
1
VOUT1
C47
2.2uF
0805
CUSTOMER NOTICE
VOUT1
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
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
2
3
4
5
1
VOUT0
TECHNOLOGY
LT
YI S.
TITLE: SCHEMATIC
DUAL-PHASE/DUAL OUTPUT STEP-DOWN DC/DC CONVERTER
WITH POWER SYSTEM MANAGEMENT
SIZE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
N/A
SCALE = NONE
2
DATE:
IC NO.
LTC3880EUJ
REV.
2
DEMO CIRCUIT 2263A
Wednesday, January 20, 2016
SHEET 2
1
OF 2
A
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