DC1590B - Schematic

5
4
3
2
1
REVISION HISTORY
TP9
VDD33
TP17
VDD25 GND
TP23
INTVCC/EXTVCC
TP7
VIN
VDD25
VIN
C13
150uF
35V
C17
0.22uF
DESCRIPTION
1
OPT
APPROVED
PRODUCTION
DATE
YI S.
1-24-11
2
EXTVCC_DRV
C6
100nF
D2
D1
VIN
1
+
TP37
R60
1
R52 2
C5
4.7uF
REV
__
INTVCC
TP36
6.5V - 24V
ECO
TP26
2
VIN
TP25
D
GND
5
Q3
RJK0305DPB
C19
10uF
C28
10uF
D
Q8
(OPT)
5
GND
VDD33
GND
TP29
R59 0
C14
10nF
Q6
15
RUN1
14
16
ASEL
23
WP
SC
24
ON
BG0
ISNS0+
ITH1
ISNS0ITH0
VSENSE0+
TSNS1
VSENSE0-
TG1
ASEL
BOOST1
WP
SW1
SC
BG1
R42
10.0K
10.0K
VOUT0_CFG
VOUT1_CFG
VDD33
17
18
19
B
21
FREQ_CFG
ISNS1VOUT0_CFG
VSENSE1
36
BG0
6
ISNS0+
7
ISNS0-
1
2
3
5
*
VTRIM0_CFG
GPIO1
VTRIM1_CFG
GPIO0
+ C10
330uF
D3L
4V
R14
*
*
GND_SNS C
VIN
2
Q1
RJK0305DPB
C18
10uF
C27
10uF
TP40
4
GND
Q7
(OPT)
4
TP20
GND
VOUT1
TG1
R56 0
31
29
GND
R25
0
TP16
1
30
TP39
C42
+ 330uF
D3L
OPT
4V
C43
+ 330uF
D3L
OPT
4V
+ C29
330uF
D3L
4V
C38
VSENSE0+
C1
RJK0330DPB
Q2
SW1
32
BG1
3
ISNS1+
4
ISNS1-
L1
100nF
4
VOUT1
2512
*
ADJ., MAX 20A
R30
R1
4
TP41
R10
*
Q9
(OPT)
R7
*
27
*
C32
100uF
*
R6
C24
100uF
C20
100uF
OPT
*
R9
0
TP3
R11
VOUT1_CFG
*
C21
13
*
12
VOUT1_SNS
R12
+ C11
330uF
D3L
6.3V
*
C4
GND
VDD25
VTRIM1_CFG
VTRIM0_CFG
20
ISNS1+
VOUT0_SNS
1
2
3
1
2
3
SW0
+ C30
330uF
D3L
6.3V
C45
+ 330uF
D3L
OPT
6.3V
C44
+ 330uF
D3L
OPT
6.3V
B
*
PGND
R5
FREQ_CFG
*
C22
39
RUN1
RUN0
TP4
*
37
TSNS0
2
1
1
2
3
25
LTC3880EUJ
R8
0
R13
VSENSE0-
RUN0
3
ALERT
R34
*
ADJ., MAX 20A
C23
100uF
OPT
5
40
TSNS0
U4
SW0
TG0
R29
1
2
3
C12
10nF
28
BOOST0
SYNC
38
5
PLACE Q5,Q6 NEAR L1,L2. RESPECTIVELY
TG0
C25
100uF
C34
100uF
1
2
3
5
ITH0
C
*
5
26
*
R2
1
2
3
11
ALERTB
SDA
4
1
2
3
*
8
SCL
VOUT0
2512
*
R15
4
TP38
R16
*
Q10
(OPT)
5
10
SYNC
ITH1
OFF
VOUT0
BOOST1
9
SCL
SDA
R4
4.87K
*
JP1
WP
4
100nF
5
R40
R39
10.0K 10.0K
35
C7
4.7nF
C15
100pF
R3
4.87K
Q5
10uF
C2
Q4
RJK0330DPB
VIN
C8
4.7nF
TSNS1
1.0uF
1.0uF
4
BOOST0
R69 OPT
R41
R57
10.0K 10K
C16
100pF
C48
VDD33
R48 0
22
ITH0_TP
ITH0
C3
VDD25
TP2
C9
L2
33
ITH1_TP
ITH1
VDD33
R47 0
INTVCC
TP1
*
R32
24.9K
R67
24.9K
R73
OPT
R74
OPT
34
R18
41
VDD33
R17
10K
R43 10K
R44 10K
CURRENT SENSE CONNECTIONS
R24
23.2K
R23
*
R22
11.3K
R21
11.3K
R20
0
R19
0
*
SGND AND PGND CONNECTED AT
A SINGLE NODE NEAR U1
GPIO0B GPIO1B
R1,R2
R7,R15
R6,R29
"A" VERSION "R SENSE"
OPT
OPT
0
"B" VERSION "DCR SENSE"
1.4K
0
CONFIGURATION
OPT
R30,R34 R10,R16
0
OPT
R11,R13
R12,R14 C21,C22
C4,C38
R3,R4
R18
0.002
100
100
1nF
OPT
4.87K
OPT
OPT
0.4uH
0
0
1.4K
0.22uF
1.0 uF
4.87K
16.2K
17.4K
0.56uH
R23
L1,L2
NOTE:
FSW = 350 KHz FOR "A" VERSION
FSW = 425 KHz FOR "B" VERSION
SGND
TP10
NOTE: UNLESS OTHERWISE SPECIFIED
A
1. ALL RESISTORS ARE IN OHMS, 0603.
ALL CAPACITORS ARE IN MICROFARADS, 0603.
2. INSTALL SHUNTS AS SHOWN.
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.
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
DIGITALLY PROGRAMMABLE DUAL STEP-DOWN DC/DC SUPPLY
SIZE
N/A
SCALE = NONE
2
DATE:
IC NO.
REV.
LTC3880EUJ FAMILY
1
DEMO CIRCUIT 1590B
Wednesday, December 07, 2011
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
TP11
GPIO1B
J9
ALERTB
SDA
TP28
TP24
V+ 1
3.3V or 5V 2
GND 3
SCK/SCL 4
MISO 5
CS 6
MOSI/SDA 7
GND 8
EESDA 9
EEVCC 10
EESCL 11
EEGND 12
GND 13
GPIO_1 14
ALERTB
SCL
TP6
SCL
TP19
TP27
3
D
R84
OPT
1
C
NC
GPIO0-GPIO1
R79 0
GPIO0B
TP12
R82
OPT.
SC
GPIO0B
TP14
RUN0
VSENSE0R80 0
1
2
3
4
5
6
7
8
9
10
11
12
R51
0
SHARE_CLK
FAULT2
FAULT3
FAULT1
SYNC_C
J8 DEMO HEADER (M)
TO DC1613A
R31
OPT
R33
OPT
R81
R58
OPT
0
NC
1
RUN1
TP13
RUN1
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
VDD33
VDD33
R28
10K
SW2
RUN1
C
SW1
RUN0
R64
10
ON
5
R27
10K
2
R63
10
4
1
J10
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
R26
OPT
0
R49
OPT
0
C
3
RUN0-RUN1
ON
5
2
OFF
C33
10nF
OFF
6
3
+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
JP2
4
1
+3.3V
RUN0
2
VSENSE0+
(OPT)
AUXP
SDA
GND
SCL
LGKPWR
ALERTB
GPIO_1
OUTEN_0
OUTEN_1
GND
AUXSCL
AUXSDA
GPIO1B
SYNC
TO DC590B
C
SYNC
JP5
TP5
SDA
SC
6
3
D
AUXP
R77 0
2
+3.3V
C26
10nF
J7 DEMO HEADER (F)
TP30
SGND
TP8
SGND
C31
100nF
B
B
R35
4.99K
U5
1
2
3
4
A0
VCC
A1
WP
A2
SCL
VSS
SDA
8
AUXVCC
7
EEWP
6
EESCL
5
EESDA
R36
4.99K
R37
4.99K
24LC025-I/ST
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
DIGITALLY PROGRAMMABLE DUAL STEP-DOWN DC/DC SUPPLY
SIZE
N/A
SCALE = NONE
2
DATE:
IC NO.
REV.
LTC3880EUJ FAMILY
1
DEMO CIRCUIT 1590B
Wednesday, December 07, 2011
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
D
D
VOUT0
2
VOUT0
D3
GREEN
3
3
GREEN
3
TP31
TP33
D5
IOUT0
TST
GND
1
GPIO0B
NOTE:
PULSE OUT
10mV / AMP
1
GPIO1B
2N7002A
ALERTB
RED
2N7002A
R55
127
2
R68
0.01
Q13
Q12
2
R62
10K
1
2
3
DO NOT EXCEED 5% DUTY CYCLE!
TP0101K
Q14
GPIO1
D4
GPIO0
4
1
ALERTB
2
3
4
5
C41
0.22uF
R54
200
R53
200
5
Q15
RJK0305DPB
TP18
+3.3V
J11
1
PULSE0 IN
+3.3V
+3.3V
DYNAMIC LOAD CIRCUIT 0
C
C
VIN
DYNAMIC LOAD CIRCUIT 1
VOUT1
J12
C47
0.22uF
Q16
RJK0305DPB
TP32
3
JP3 +3.3 V TEST
VOUT1
5
6
1
R72
10K
1
2
3
DO NOT EXCEED 5% DUTY CYCLE!
2
OFF
4
PULSE1 IN
R50
100K
U6
ON
2
3
4
5
5
1
TP34
GND
R75
0.01
7
8
TP35
IOUT1
TST
+
NOTE:
PULSE OUT
10mV / AMP
C36
3.3uF
SHDN
NC
GND
GND
GND
SENSE/ADJ
VIN
OUTPUT
4
3
+3.3V
2
R38
LT1129CS8-3.3
C37
1uF
0
TP15
+3.3V TST
1
C35
10uF
TP22
SGND
B
B
VIN
VOUT1
JP4
EXTVCC_DRV
R61
100K
3
VOUT0
U7
R66
30
1W
2512
OPT
ON
2
5
OFF
6
1
R65
30
1W
2512
OPT
7
8
SHDN
GND
GND
SENSE/ADJ
VIN
OUTPUT
CUSTOMER NOTICE
A
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
4
3
4
3
C49
4.7uF
2
1
EXTVCC_DRV
LT1129CS8-5
C40
1uF
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.
NC
GND
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
DIGITALLY PROGRAMMABLE DUAL STEP-DOWN DC/DC SUPPLY
SIZE
N/A
SCALE = NONE
2
DATE:
IC NO.
REV.
LTC3880EUJ FAMILY
1
DEMO CIRCUIT 1590B
Wednesday, December 07, 2011
SHEET 3
1
OF 3
A
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