DC1753B - Schematic

5
4
E1
VDD33
E2
E4
3
VDD25 GND
2
1
REVISION HISTORY
INTVCC/EXTVCC
GND
ECO
2
2
C14
10nF
Q6
MMBT3906LT
14
RUN
ASEL
16
23
WP
SHARE_CLK 24
3
JP1
WP
ON
15
2
R5
10K
1
OFF
FREQ_CFG
R42
10K
17
VOUT_CFG18
19
VDD33
VTRIM_CFG
20
VSENSE0-
TSNS0
RUN0
TG1
ASEL
BOOST1
WP
SW1
SC
BG1
ISNS1+
FREQ_CFG
R32
OPT
R73
OPT
R24
15.8K
R23
OPT
R22
OPT
R20
OPT
VSENSE1
VOUT1_CFG
VTRIM0_CFG
GPIO1
VTRIM1_CFG
GPIO0
5
5
1
2
3
C22
39
SW0
36
BG0
6
ISNS0+
7
ISNS0-
*
*
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE IN OHMS, 0603.
ALL CAPACITORS ARE IN MICROFARADS, 0603.
2. INSTALL SHUNTS AS SHOWN.
*
*
330uF
D3L
VOUT
R8 ADJ., MAX 40A
0
E7
+ C42
D3L
OPT
D3L
OPT
GND
*
C38
*
VSENSE0+
1
R25
0
E8
VIN
2
R67 0
30
R56 0
31
29
SW1
32
BG1
3
ISNS1+
4
ISNS1-
Q1
4
Q2
BSC011N03LSI
4
OPT
Q9
27
L1
R10
*
*
R1
4
C
C27 10uF
Q7
OPT
4
C1 100nF
GND_SNS
C18 10uF
R7
*
*
2512
R30
*
R6
*
+
C32 C24
OPT 100uF
1210
+
C11
C20
100uF 330uF
1210 D3L
+
C30
330uF
D3L
+
C45
D3L
OPT
C44
D3L
OPT
R11
R45 10K
13
*
C21
*
12
R12
*
VDD33
C4
*
R44 10K
B
GPIO0B
FSW
R1,R2
350KHz
OPT
-B VERSION DCR SENSE 425KHz
1.4K
ASSY
-A VERSION
R SENSE
CURRENT SENSE CONNECTIONS
R7,R15 R6,R29 R30,R34 R10,R16 R11,R13 R12,R14 C21,C22 C4,C38 L1,L2
OPT
1nF
OPEN 0.4uH
0
0.002
100
0
100
0
OPT
0
OPT
3
0.22uF 1.0 uF
1.4K
0
0.56uH
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.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
4
330uF
D3L
+ C43
VOUT_SNS
TECHNOLOGY
HZ
YI S.
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
DUAL-PHASE SINGLE OUTPUT STEP-DOWN DC/DC
CONVERTER WITH DIGITAL POWER MANAGEMENT
SIZE
5
+ C29
R14
CUSTOMER NOTICE
A
R29
+ C10
J4
SGND AND PGND CONNECTED AT
A SINGLE NODE NEAR U1
E11
C34 C25 C23
OPT 100uF 100uF
R34 1210
1210 1210
1
2
3
1
2
3
37
*
SGND
*
2512
J3
R13
GPIO1B
41
R18
OPT
ISNS1-
VOUT0_CFG
R15
R2
*
TG0
VSENSE0-
RUN1
*
5
VSENSE0+
TSNS1
B
R17
10K
25
22
ISNS0-
ITH0
GND
VDD25
21
ISNS0+
*
1
2
3
Q5
MMBT3906LT
28
40
TSNS0
BG0
4
R16
5
PLACE Q5,Q6 NEAR L1,L2. RESPECTIVELY
C12
10nF
ALERT LTC3880EUJ
Q10
OPT
VOUT
L2
1
2
3
TSNS1
C
SW0
38
D
Q8
OPT
4
5
5
TG0
BOOST0
U4
ITH1
4
51
2
3
26
ITH
SYNC
100nF
1
2
3
11
ALERTB
SDA
C2
BOOST1
8
SYNC
VDD33
SDA
R3
4.87K
VDD25
10
SCL
BOOST0
BSC011N03LSI
Q4
4
PGND
C16
100pF
9
SCL
C48
10uF
34
C15
100pF
C8
4.7nF
35
R41 R57 R40 R39
10K 10K 10K 10K
33
R48 0
ITH_TP
INTVCC
ITH
C9 C3
1uF 1uF
VIN
E9
R59 0
VDD33
E3
6-6-14
C28 10uF
1
2
3
GND
DATE
YI S.
C19 10uF
BSC050N03LS
Q3
VDD33
APPROVED
VIN
5
R63 0
DESCRIPTION
PRODUCTION
VIN
D1
CMDSH-3TR
5
GND
C17
0.22uF
1
EXTVCC_DRV
BSC050N03LS
C13
150uF
35V
+
J2
C6
D2
100nF CMDSH-3TR
1
VDD25
R52 2
VIN
6.5V - 24V
R60 OPT
INTVCC
C5
4.7uF
0805
REV
__
E10
VIN
J1
D
E6
1
VIN
E5
N/A
SCALE = NONE
2
DATE:
IC NO.
LTC3880EUJ
DEMO CIRCUIT 1753B-A/B
Monday, July 21, 2014
REV.
1
SHEET 1
1
OF 3
A
5
4
3
2
1
ALL PARTS ON THIS PAGE ARE FOR DEMO BOARD ONLY, NOT NEEDED IN CUSTOMER DESIGN
E25
GPIO1B
ALERTB
SDA
E13
SHARE_CLK
SCL
E14
E15
E16
SYNC
R70
JP5
3
E17
SYNC
ALERTB
SDA
SCL
SHARE_CLK
R83
D
OPT
GPIO1B
2
D
1
R95
E19
OPT
C
NC
GPIO0-GPIO1
GPIO0B
0
GPIO0B
D9
OPT
R94
D6
OPT
OPT
E20
RUN
3V3
C
RUN1
R96
OPT
1
FAULTB 2
CTRL 3
ALERTB 4
SDA 5
SHARE_CLK 6
SCL 7
RESETB 8
AUXP 9
UNUSED 10
UNUSED 11
GND 12
GND 13
12V 14
12V
J15 DEMO HEADER (M)
C50
1
100nF
2
3
4
A0
VCC
A1
WP
A2
SCL
VSS SDA
8
AUXVCC
7
EEWP
6
EESCL
5
EESDA
R84
4.99K
R85
4.99K
R87
R80
OPT
OPT
RUN1
E31
R81
OPT
R82
OPT
SGND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
R86
OPT
VIN
24LC025-I/ST
B
R90
0
VDD33
TO DC1613A
U5
RUN
E33
FAULTB
CTRL
ALERTB
SDA
SHARE_CLK
SCL
RESETB
AUXP
UNUSED
UNUSED
GND
GND
12V
12V
J14 DEMO HEADER (F)
C
R49
10.0K
SW1
RUN
4
1
AUXP
SDA
GND
SCL
LGKPWR
ALERTB
GPIO_1
OUTEN_0
OUTEN_1
GND
AUXSCL
AUXSDA
1
2
3
4
5
6
7
8
9
10
11
12
ON
5
2
R77
10
OFF
6
3
J10
R79
3V3
0
C46
10nF
1206
VIN
E21
B
GND
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
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
A
TECHNOLOGY
HZ
YI S.
TITLE: SCHEMATIC
DUAL-PHASE SINGLE OUTPUT STEP-DOWN DC/DC
CONVERTER WITH DIGITAL POWER 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
DEMO CIRCUIT 1753B-A/B
Monday, July 21, 2014
REV.
1
SHEET 2
1
OF 3
A
5
4
3
2
1
ALL PARTS ON THIS PAGE ARE FOR DEMO ONLY, NOT NEEDED IN CUSTOMER DESIGN
+3.3V
D
+3.3V
TP0101K
Q14
D3
GREEN
GPIO0B
2
3
VOUT
1
ALERTB
GND
1
Q12
2N7002A
1
GPIO0B
NOTE:
PULSE OUT
10mV / AMP
R68
0.01
D5
ALERTB
RED
2
E24
R65
30
1W
2512
OPT
IOUT
TST
3
E27
1
2
3
R62
10K
DO NOT EXCEED 5% DUTY CYCLE!
R53
200
VOUT
1
C41
0.22uF
0805
4
PULSE IN
D
R55
127
2
E23
J11
R38 49.9 1
2
3
4
5
Q15
RJK0305DPB
5
DYNAMIC LOAD CIRCUIT
2
VOUT
C
C
VIN
2
5
6
7
1
ON
OFF
8
+ C36
C37
1uF
1206
4
NC
GND
3
GND
2
GND SENSE/ADJ
VIN
+3.3V
VIN
JP4
EXTVCC_DRV
1
VIN
OUTPUT
LT1129CS8-3.3
C35
10uF
1206
ON
OFF
1
3.3uF
3528
U6
SHDN
3
R50
1.5K
3
JP3
LED
2
R61
1.5K
5
6
U7
SHDN
7
8
B
C40
1uF
1206
3V3
VIN
OUTPUT
LT1129CS8-5
3
C49
4.7uF
2
1
EXTVCC_DRV
B
2
1
VIN
GND
GND SENSE/ADJ
4
VDD33
Q11
TP0101K
3
GND
NC
R66 10K
R64
10K
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
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
A
TECHNOLOGY
HZ
YI S.
TITLE: SCHEMATIC
DUAL-PHASE SINGLE OUTPUT STEP-DOWN DC/DC
CONVERTER WITH DIGITAL POWER 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
DEMO CIRCUIT 1753B-A/B
Friday, August 29, 2014
REV.
1
SHEET 3
1
OF 3
A
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