DC1753A - Schematic

5
4
E1
VDD33
E2
E4
3
VDD25 GND
2
1
REVISION HISTORY
INTVCC/EXTVCC
GND
ECO
C13
150uF
35V
2
2
5
Q5
MMBT3906LT
C14
10nF
Q6
MMBT3906LT
14
RUN
ASEL
16
23
WP
3
JP1
WP
ON
15
SC
2
R5
10K
1
OFF
24
FREQ_CFG
R42
10K
17
VOUT_CFG 18
19
VDD33
VTRIM_CFG
20
TSNS1
VSENSE0-
TSNS0
RUN0
TG1
ASEL
BOOST1
WP
SW1
SC
BG1
ISNS1+
FREQ_CFG
ISNS1-
VOUT0_CFG
VSENSE1
VOUT1_CFG
VTRIM0_CFG
R32
OPT
R73
OPT
R24
15.8K
R23
OPT
R22
OPT
R20
OPT
GPIO1
VTRIM1_CFG
GPIO0
5
1
2
3
36
BG0
6
ISNS0+
2. INSTALL SHUNTS AS SHOWN.
D3L
OPT
*
*
ISNS0-
R25
0
C38
1
E8
VIN
2
TG1
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
C32 C24
OPT 100uF
1210
*
R6
*
+
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
CURRENT SENSE CONNECTIONS
ASSY
FSW
R SENSE
R1,R2
350KHz
OPT
-B VERSION DCR SENSE 425KHz
1.4K
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
0.002
100
100
0
OPT
OPT
0
1.4K
0
3
0.22uF 1.0 uF
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
APP ENG.
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.
4
D3L
OPT
VOUT
R8 ADJ., MAX 40A
0
E7
GND
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
330uF
D3L
+ C42
J4
CUSTOMER NOTICE
1. ALL RESISTORS ARE IN OHMS, 0603.
ALL CAPACITORS ARE IN MICROFARADS, 0603.
*
330uF
D3L
+ C43
VOUT_SNS
SGND AND PGND CONNECTED AT
A SINGLE NODE NEAR U1
NOTE: UNLESS OTHERWISE SPECIFIED
*
+ C29
R14
VSENSE0+
-A VERSION
A
R29
+ C10
1
2
3
*
*
SGND
5
1
2
3
SW0
GPIO1B
E11
C34 C25 C23
100uF 100uF
R34 OPT
1210 1210 1210
*
C22
39
30
*
R2
2512
J3
R13
VSENSE0-
41
R18
OPT
TG0
37
7
R15
4
*
RUN1
B
R17
10K
25
22
VSENSE0+
GND
VDD25
21
ISNS0-
ITH0
*
5
40
TSNS0
C12
10nF
28
ISNS0+
ITH1
*
1
2
3
C
PLACE Q5,Q6 NEAR L1,L2. RESPECTIVELY
BG0
R16
5
5
TSNS1
ALERT LTC3880EUJ
VOUT
L2
1
2
3
26
ITH
SW0
U4
38
Q10
OPT
5
ALERTB
TG0
BOOST0
4
51
2
3
11
SYNC
4
1
2
3
8
SYNC
SDA
100nF
BOOST1
SDA
R3
4.87K
SCL
VDD33
10
VDD25
9
SCL
C2
BSC011N03LSI
Q4
4
PGND
C16
100pF
BOOST0
D
C28 10uF
C48
10uF
34
C8
4.7nF
C15
100pF
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
3-28-12
Q8
OPT
1
2
3
GND
DATE
YI S.
C19 10uF
BSC050N03LS
Q3
VDD33
APPROVED
VIN
BSC050N03LS
J2
GND
C17
0.22uF
DESCRIPTION
PRODUCTION
EXTVCC_DRV
D1
CMDSH-3TR
1
+
C6
D2
100nF CMDSH-3TR
1
5
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.
REV.
LTC3880EUJ
DEMO CIRCUIT 1753A
1
Monday, May 07, 2012
SHEET 1
1
OF 3
A
5
4
3
2
1
ALL PARTS ON THIS PAGE ARE FOR DEMO ONLY, NOT NEEDED IN CUSTOMER DESIGN
3V3
E13
E12
J9
V+ 1
3.3V or 5V2
GND 3
SCK/SCL45
MISO 6
CS
MOSI/SDA7
GND 8
EESDA 9
EEVCC 10
EESCL 11
EEGND 12
GND 13
GPIO_1 14
ALERTB
SCL
SDA
SDA
E15
SCL
E16
E17
JP5
3
D
E25
GPIO1B
C
NC
GPIO0-GPIO1
R79 0
SYNC
GPIO1B
1
GPIO0B
E19
GPIO0B
E20
R80 0
RUN
RUN
1
2
3
4
5
6
7
8
9
10
11
12
TO DC1613A
R31
OPT
R33
OPT
R51
0
3V3
R58
OPT
SHARE_CLK
FAULT4
FAULT2
FAULT3
FAULT1
SYNC_C
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
+3.3V
VIN_SNS
GND
VIN_EN
SCL
ALERTB
SDA
CONTROL0
SPARE1
SPARE2
WDI/RESETB
CONTROL1
SPARE3
SHARE_CLK
FAULT4
FAULT2
FAULT3
FAULT1
SPARE4
GND
J7 DEMO HEADER (F)
VDD33
R27
10K
SW1
RUN
4
1
1
+3.3V 2
VIN_SNS 3
GND 4
VIN_EN 5
SCL 6
ALERTB 7
SDA 8
CONTROL0 9
SPARE1 10
SPARE2 11
WDI/RESETB 12
CONTROL1 13
SPARE3 14
SHARE_CLK 15
FAULT4 16
FAULT2 17
FAULT3 18
FAULT1 19
SPARE4 20
GND
J8 DEMO HEADER (M)
C
AUXP
SDA
GND
SCL
LGKPWR
ALERTB
GPIO_1
OUTEN_0
OUTEN_1
GND
AUXSCL
AUXSDA
SYNC
SC
TO DC1427A
(OPT)
J10
SC
R77 0
E14
ON
5
OFF
6
3
D
ALERTB
2
AUXP
2
C
R63
10
C26
10nF
E22
SGND
E21
GND
C31 100nF
B
B
R35
4.99K
U5
1
2
3
4
A0
VCC
A1
WP
A2
SCL
VSS SDA
24LC025-I/ST
8
AUXVCC
7
EEWP
6
EESCL
5
EESDA
R36
4.99K
R37
4.99K
R70
OPT
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.
A
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
APPROVALS
TECHNOLOGY
PCB DES.
HZ
APP ENG.
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
N/A
SCALE = NONE
2
DATE:
IC NO.
REV.
LTC3880EUJ
DEMO CIRCUIT 1753A
1
Monday, May 07, 2012
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
C41
0.22uF
0805
TP0101K
Q14
1
3
Q12
2N7002A
1
GPIO0B
R55
127
2
R68
0.01
D5
ALERTB
RED
2
IOUT
TST
NOTE:
PULSE OUT
10mV / AMP
E24
GND
R65
30
1W
2512
OPT
E27
1
2
3
R62
10K
DO NOT EXCEED 5% DUTY CYCLE!
1
ALERTB
D3
GREEN
GPIO0B
2
4
PULSE IN
VOUT
2
3
4
5
E23
5
Q15
RJK0305DPB
R53
200
VOUT
3
J11
R38 49.9 1
1
DYNAMIC LOAD CIRCUIT
D
2
VOUT
C
C
VIN
R50
1.5K
2
5
6
1
ON
OFF
7
8
C37
1uF
1206
4
NC
GND
VIN
3
GND
2
GND SENSE/ADJ
+3.3V
JP4
EXTVCC_DRV
1
VIN
OUTPUT
LT1129CS8-3.3
C35
10uF
1206
ON
2
OFF
1
+ C36
3.3uF
3528
U6
SHDN
3
3
JP3
LED
R61
1.5K
5
U7
SHDN
6
7
8
B
C40
1uF
1206
3V3
GND SENSE/ADJ
VIN
OUTPUT
LT1129CS8-5
3
C49
4.7uF
2
1
EXTVCC_DRV
B
2
1
VIN
GND
4
VDD33
Q11
TP0101K
3
GND
NC
R66 10K
R64
10K
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.
A
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
APPROVALS
TECHNOLOGY
PCB DES.
HZ
APP ENG.
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
N/A
SCALE = NONE
2
DATE:
IC NO.
REV.
LTC3880EUJ
DEMO CIRCUIT 1753A
1
Monday, May 07, 2012
SHEET 3
1
OF 3
A
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