11
dc1989aaf
DEMO MANUAL DC1989A-A
schematic Diagram
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
OPTIONAL JUMPER FOR SINGLE OUTPUT CONFIGURATION
ON
OFF
RUN1
1210
0.035 VIA TESTPOINTS
1210
1210
1210
1210
6.3V
1210
1210
0805
0805
1210
6.3V
1210
1210
OPT
OPT
6.3V
µModule REGULATOR WITH DIGITAL POWER MANAGEMENT
GPIO1B
RUN1
SHARE_CLK
ALERTB
SCL
SDA
GPIO0B
SYNC
VOSNS1
VIN
VOUT0
VIN
VOUT1
VOUT0
VOUT1
VOSNS0-
A0_EEPROM
A1_EEPROM
VCC
VCC
SHARE_CLK
ALERTB
COMP0
COMP1
SCL
SDA
GPIO0B
RUN0
GPIO1B
RUN1
SYNC
RUN0
RUN1
GPIO0B
GPIO1B
COMP0
COMP1
VOSNS1
VOSNS0-
SIZE
DATE:
IC NO.
REV.
SHEET
OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507
Milpitas, CA 95035 Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
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
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
Tuesday, May 28, 2013
26
HIGH EFFICIENCY, POLY-PHASE, DC/DC STEP-DOWN
HZ
JIAN L.
B
LTM4676EY
DEMO CIRCUIT 1989A-A
SIZE
DATE:
IC NO.
REV.
SHEET
OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507
Milpitas, CA 95035 Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
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
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
Tuesday, May 28, 2013
26
HIGH EFFICIENCY, POLY-PHASE, DC/DC STEP-DOWN
HZ
JIAN L.
B
LTM4676EY
DEMO CIRCUIT 1989A-A
SIZE
DATE:
IC NO.
REV.
SHEET
OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
Fax: (408)434-0507
Milpitas, CA 95035 Phone: (408)432-1900
1630 McCarthy Blvd.
LTC Confidential-For Customer Use Only
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
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
Tuesday, May 28, 2013
26
HIGH EFFICIENCY, POLY-PHASE, DC/DC STEP-DOWN
HZ
JIAN L.
B
LTM4676EY
DEMO CIRCUIT 1989A-A
P10P10
COUT14 OPT
COUT14 OPT
SW2SW2
1
2
3
4
5
6
R52
OPT
R52
OPT
C9 OPT
C9 OPT
COUT20 100uF
COUT20 100uF
R47
0
R47
0
R32
0
R32
0
R30 0
R30 0
R42
1.65K
R42
1.65K
C11 OPT
C11 OPT
CIN10 10uF
CIN10 10uF
R50
0
R50
0
COUT13 OPT
COUT13 OPT
R46
(OPT)
R46
(OPT)
R39 10K
R39 10K
J6
GND
J6
GND
C7C7
R35 10K
R35 10K
E9
VOUT1_SNS
E9
VOUT1_SNS
+
COUT19 330uF
+
COUT19 330uF
R54
0
2010
R54
0
2010
R45
(OPT)
R45
(OPT)
R27R27
R38
OPT
R38
OPT
R53
0
2010
R53
0
2010
R55
OPT
R55
OPT
R28
OPT
R28
OPT
R51
0
2010
R51
0
2010
E10
GND1_SNS
E10
GND1_SNS
R119
0
R119
0
CIN11 10uF
CIN11 10uF
COUT17 100uF
1210
COUT17 100uF
1210
R34
OPT
R34
OPT
R31 OPT
R31 OPT
P9P9
COUT22
OPT
COUT22
OPT
C10 OPT
C10 OPT
R56
0
R56
0
P7P7
R43
(OPT)
R43
(OPT)
J5
VOUT1
J5
VOUT1
+
COUT16 330uF
+
COUT16 330uF
R40
1.65k
R40
1.65k
R33
OPT
R33
OPT
R41 10
R41 10
CIN8 10uF
CIN8 10uF
C8
OPT
C8
OPT
R29
OPT
R29
OPT
C12 10nF
C12 10nF
R44
(OPT)
R44
(OPT)
R36 10K
R36 10K
P8P8
COUT18 100uF
1210
COUT18 100uF
1210
COUT21
OPT
COUT21
OPT
+
COUT15 330uF
+
COUT15 330uF
R49
0
2010
R49
0
2010
P6P6
COUT12 100uF
COUT12 100uF
R37
OPT
R37
OPT
R48
0
R48
0
U2
LTM4676EY
U2
LTM4676EY
VOUT0
A1
VOUT0
A2
VOUT0
A3
VOUT0
D1
ISNS0b-
E1
F1
ISN
S1b-
G1
ISN
S1b+
H1
VOU
T1
J1
VOU
T1
J2
VOU
T1
J3
VOU
T1
K1
VOUT0
B1
VOUT0
B2
VOUT0
B3
VOUT0
D2
ISNS0a-
E2
F2
ISN
S1a-
G2
ISN
S1a+
H2
VOU
T1
K2
VOU
T1
K3
VOU
T1
L1
VOU
T1
L2
VOUT0
C1
VOUT0
C2
VOUT0
C3
VOUT0
D3
GND
A4
GND
A6
GND
A7
GND
A8
VOU
T1
L3
VOU
T1
M1
VOU
T1
M2
VOU
T1
M3
GND
A9
GND
A10
GND
B4
GND
B5
ASEL
G4
FSWPHCFG
H4
GND
B6
GND
B7
GND
B8
GND
B9
GPIO0
E4
GPIO1
F4
SNUB0
A5
GND
C4
TSNS0b
C5
TSNS0a
D5
ALERT
E5
RUN0
F5
VOUT0CFG
G5
VTRIM0CFG
H5
TSN
S1a
J5
TSN
S1b
K5
GND
C6
SNU
B1
M5
GND
C7
GND
C8
GND
C9
SDA
D6
SCL
E6
RUN1
F6
VOUT1CFG
G6
VTRIM1CFG
H6
VDD25
J6
WP
K6
GND
D4
GND
E3
GND
F3
GND
F10
GND
G3
GND
G10
SYNC
E7
GND
M9
GND
M10
SHARE_CLK
H7
VDD33
J7
GND
G11
GND
G12
GND
L8
GND
L7
GND
L9
GND
H3
COMP0b
D8
COMP0a
E8
SGN
D
F7
SGN
D
F8
COMP
1a
H8
COMP
1b
J8
GND
H10
GND
J4
GND
M8
D9
VOSNS0-
E9
INTVCC
F9
INTVCC
G9
VOSN
S1
H9
VOR
B1
J9
GND
J10
GND
L4
GND
L5
GND
K4
SW0
B10
DNC
E11
VORB0+
D10
VORB0-
E10
GND
L6
GND
K7
GND
K8
GND
K9
DNC
C10
SW1
L10
GND
M4
VINH0
B12
VINH0
B11
VINH0
A12
VINH0
A11
DNC
K10
VINL
F12
GND
M6
DNC
H11
VINH1
H12
VINH1
J11
VINH1
J12
VINH1
K11
VINH0
E12
VINH0
D12
VINH0
D11
VINH0
C12
VINH0
C11
VINL
F11
GND
M7
VINH1
K12
VINH1
L11
VINH1
L12
VINH1
M11
VINH1
M12
SGN
D
G7
SGN
D
G8
GND
D7
CIN9 10uF
CIN9 10uF
P11P11
