7
dc2268aif
DEMO MANUAL DC2268A-I
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
OPT
ION
AL
JU
M
PER
FOR
1
OUT
PUT
CONFIGURA
TI
ON
*
*
MO
DU
LE
-A
L
TM4620
-B
L
TM4620A
-C
L
TM4628
-D
L
TM4630
-E
L
TM4630-
1
-F
L
TM
4630A
U
1
[1]
-G
L
TM4631
-H
L
TM4650-
1
- I L
TM
4650A-
1
V
O
UT
1
V
O
UT
2
3.
3V/
18A
2.
5V/
18A
R7 R18
13.
3K
19.
1K
R15
143K
R10
10K
C12
3300p
C7
68p
1.
0V/
10A
1.
5V/
10A
90.
9K
40.
2K
16
9K
R16
C5
10
K
3300p
C15
68p
7.8
7K
1000p
1000p
14K
O
PT
O
PT
90.
9K
40.
2K
12
1K
1.
0V/
18A
1.
5V/
18A
7.
87K
14K
1000p
1000p
O
PT
O
PT
3.
3V/
13A
5V/
13A
13
.3K
8.
25K
191K
O
PT
O
PT
O
PT
O
PT
47p
33p
3.
3V/
25A
1.
5V/
25A
13.
3K
40.
2K
14
3K
5K
2200p
5K
2200p
O
PT
O
PT
1.
0V/
8A
1.
5V/
8A
90.
9K
40.
2K
12
1K
7.8
7K
1000p
14
K
1000p
O
PT
O
PT
PGOOD1
RUN1
VOS1+
PGOOD2
COMP1
TRACK1
VFB1
VFB1
VFB2
COMP2
RUN2
VFB2
VFB1
VOS1-_R
VOS1+_R
VOS2+_R
VOUT1
VOUT2
VOUT2
VOUT1
RUN2
RUN1
VOS1-_R
VOS1+_R
VOS2+_R
VOS2+
TRACK2
VOS1-
VOS1+
VIN2
INTVCC
INTVCC
VOUT1
VOS1+
VOS1-
INTVCC
VOUT2
EXTVCC
VIN1
VIN2
VOS2+
INTVCC
VIN2
INTVCC
VIN1
VIN1
VOUT1
VOUT2
VOUT1
VOUT2
RUN1
RUN2
TRACK1
TRACK2
VFB1
VFB2
COMP1
COMP2
SI
ZE
DA
TE
:
IC NO.
REV.
SH
EE
T
OF
TITLE
:
APPROV
AL
S
PCB DE
S.
APP EN
G.
TECHNO
LO
G
Y
Fa
x:
(408)
434-
0507
M
ilp
ita
s, C
A 95035
Ph
on
e:
(408)
432-
1900
1630
M
cC
art
hy
Blv
d.
LT
C
CONF
ID
ENT
IAL
- F
O
R CUST
O
M
E
R USE ONL
Y
CUSTOMER NOTICE
LINE
AR TE
CHNO
LO
GY
HAS
MADE
A BE
ST E
FFO
RT TO
DE
SIG
N
A
CIRCUIT
THAT
MEETS CUSTO
MER-SUPPL
IED SPEC
IFICATIO
NS;
HO
W
EV
ER
, I
T R
EM
AI
NS
T
HE
C
UST
OM
ER
'S
R
ES
PO
NSI
BI
LI
TY
T
O
VE
RI
FY
P
RO
PE
R A
ND
R
EL
IA
BL
E O
PE
RA
TI
ON
IN T
HE
A
CT
UA
L
AP
PL
ICATI
ON.
CO
MP
ON
EN
T S
UBS
TI
TUTI
ON
AND
PR
IN
TE
D
CI
RC
UI
T
BO
AR
D
LA
YO
UT
M
AY
S
IG
NI
FI
CA
NT
LY
A
FF
EC
T C
IR
CU
IT
PE
RFO
RMANCE
O
R RE
LI
ABI
LI
TY
. CO
NTACT
LI
NE
AR
TE
CH
NO
LO
GY
A
PP
LI
CA
TI
ON
S E
NG
IN
EE
RI
NG
F
OR
A
SS
IS
TA
NC
E.
THIS
CIRCUIT IS
P
RO
PRIE
TARY
TO
LINE
AR TE
CHNO
LO
GY
AND
SCHEMATI
C
SUP
PL
IE
D
FO
R
US
E W
IT
H L
IN
EA
R T
EC
HN
OL
OG
Y P
AR
TS
.
SCALE =
NONE
w
w
w
.line
ar
.c
om
3
DEMO
CIRCUIT
2268A
Friday,
June
23,
2017
1
1
HIGH
EFFICIENCY,
STEP-DOWN,
MODULE
N/A
LTM4620/LTM4620A/LTM4628/
` \
Simon. T
REGULATOR
C:\PROJECTS\LTM4650A-1\DC2268A-I\DC2268A-4_20170623.DSN
LTM4630/LTM4630-1/LTM4631
SI
ZE
DA
TE
:
IC NO.
REV.
SH
EE
T
OF
TITLE
:
APPROV
AL
S
PCB DE
S.
APP EN
G.
TECHNO
LO
G
Y
Fa
x:
(408)
434-
0507
M
ilp
ita
s, C
A 95035
Ph
on
e:
(408)
432-
1900
1630
M
cC
art
hy
Blv
d.
LT
C
CONF
ID
ENT
IAL
- F
O
R CUST
O
M
E
R USE ONL
Y
CUSTOMER NOTICE
LINE
AR TE
CHNO
LO
GY
HAS
MADE
A BE
ST E
FFO
RT TO
DE
SIG
N
A
CIRCUIT
THAT
MEETS CUSTO
MER-SUPPL
IED SPEC
IFICATIO
NS;
HO
W
EV
ER
, I
T R
EM
AI
NS
T
HE
C
UST
OM
ER
'S
R
ES
PO
NSI
BI
LI
TY
T
O
VE
RI
FY
P
RO
PE
R A
ND
R
EL
IA
BL
E O
PE
RA
TI
ON
IN T
HE
A
CT
UA
L
AP
PL
ICATI
ON.
CO
MP
ON
EN
T S
UBS
TI
TUTI
ON
AND
PR
IN
TE
D
CI
RC
UI
T
BO
AR
D
LA
YO
UT
M
AY
S
IG
NI
FI
CA
NT
LY
A
FF
EC
T C
IR
CU
IT
PE
RFO
RMANCE
O
R RE
LI
ABI
LI
TY
. CO
NTACT
LI
NE
AR
TE
CH
NO
LO
GY
A
PP
LI
CA
TI
ON
S E
NG
IN
EE
RI
NG
F
OR
A
SS
IS
TA
NC
E.
THIS
CIRCUIT IS
P
RO
PRIE
TARY
TO
LINE
AR TE
CHNO
LO
GY
AND
SCHEMATI
C
SUP
PL
IE
D
FO
R
US
E W
IT
H L
IN
EA
R T
EC
HN
OL
OG
Y P
AR
TS
.
SCALE =
NONE
w
w
w
.line
ar
.c
om
3
DEMO
CIRCUIT
2268A
Friday,
June
23,
2017
1
1
HIGH
EFFICIENCY,
STEP-DOWN,
MODULE
N/A
LTM4620/LTM4620A/LTM4628/
` \
Simon. T
REGULATOR
C:\PROJECTS\LTM4650A-1\DC2268A-I\DC2268A-4_20170623.DSN
LTM4630/LTM4630-1/LTM4631
SI
ZE
DA
TE
:
IC NO.
REV.
SH
EE
T
OF
TITLE
:
APPROV
AL
S
PCB DE
S.
APP EN
G.
TECHNO
LO
G
Y
Fa
x:
(408)
434-
0507
M
ilp
ita
s, C
A 95035
Ph
on
e:
(408)
432-
1900
1630
M
cC
art
hy
Blv
d.
LT
C
CONF
ID
ENT
IAL
- F
O
R CUST
O
M
E
R USE ONL
Y
CUSTOMER NOTICE
LINE
AR TE
CHNO
LO
GY
HAS
MADE
A BE
ST E
FFO
RT TO
DE
SIG
N
A
CIRCUIT
THAT
MEETS CUSTO
MER-SUPPL
IED SPEC
IFICATIO
NS;
HO
W
EV
ER
, I
T R
EM
AI
NS
T
HE
C
UST
OM
ER
'S
R
ES
PO
NSI
BI
LI
TY
T
O
VE
RI
FY
P
RO
PE
R A
ND
R
EL
IA
BL
E O
PE
RA
TI
ON
IN T
HE
A
CT
UA
L
AP
PL
ICATI
ON.
CO
MP
ON
EN
T S
UBS
TI
TUTI
ON
AND
PR
IN
TE
D
CI
RC
UI
T
BO
AR
D
LA
YO
UT
M
AY
S
IG
NI
FI
CA
NT
LY
A
FF
EC
T C
IR
CU
IT
PE
RFO
RMANCE
O
R RE
LI
ABI
LI
TY
. CO
NTACT
LI
NE
AR
TE
CH
NO
LO
GY
A
PP
LI
CA
TI
ON
S E
NG
IN
EE
RI
NG
F
OR
A
SS
IS
TA
NC
E.
THIS
CIRCUIT IS
P
RO
PRIE
TARY
TO
LINE
AR TE
CHNO
LO
GY
AND
SCHEMATI
C
SUP
PL
IE
D
FO
R
US
E W
IT
H L
IN
EA
R T
EC
HN
OL
OG
Y P
AR
TS
.
SCALE =
NONE
w
w
w
.line
ar
.c
om
3
DEMO
CIRCUIT
2268A
Friday,
June
23,
2017
1
1
HIGH
EFFICIENCY,
STEP-DOWN,
MODULE
N/A
LTM4620/LTM4620A/LTM4628/
` \
Simon. T
REGULATOR
C:\PROJECTS\LTM4650A-1\DC2268A-I\DC2268A-4_20170623.DSN
LTM4630/LTM4630-1/LTM4631
C1 OPT
CIN1 22uF
25V 1210
R1 OPT
R11
OPT
CIN2 22uF
25V 1210
+
CO1 470uF
6.3V 7343
R31
OPT
C5
*
R23
OPT
P2
R32
OPT
CIN6 22uF
25V 1210
C9 OPT
C7
*
R21
OPT
R12 OPT
R15
*
1%
CO6 100uF
6.3V 1210
CO2 100uF
6.3V 1210
U1
[1]
VOUT1
A1
VOUT1
A2
VOUT1
A3
VOUT1
A4
VOUT1
A5
VOUT1
B1
VOUT1
B2
VOUT1
B3
VOUT1
B4
VOUT1
B5
VOUT1
C1
VOUT1
C2
VOUT1
C3
VOUT1
C4
VFB1
D5
SW1
G2
PGOOD1
G9
COMP1
E6
RUN1
F5
TRACK1
E5
VOUTS1
C5
VOUT2
A8
VOUT2
A9
VOUT2
A10
VOUT2
A11
VOUT2
A12
VOUT2
B8
VOUT2
B9
VOUT2
B10
VOUT2
B11
VOUT2
B12
VOUT2
C9
VOUT2
C10
VOUT2
C11
VOUT2
C12
VFB2
D7
SW2
G11
PGOOD2
G8
COMP2
E7
RUN2
F9
TRACK2
D8
VOUTS2
C8
VIN
M2
VIN
M3
VIN
M4
VIN
M5
VIN
M6
VIN
M7
VIN
M8
VIN
M9
VIN
M10
VIN
M11
VIN
L2
VIN
L3
VIN
L4
VIN
L5
VIN
L6
VIN
L7
VIN
L8
VIN
L9
VIN
L10
VIN
L11
VIN
K2
VIN
K3
VIN
K4
VIN
K9
VIN
K10
VIN
K11
VIN
J2
VIN
J3
VIN
J4
VIN
J9
VIN
J10
VIN
J11
GND
A6
GND
A7
GND
B6
GND
B7
GND
D1
GND
D2
GND
D3
GND
D4
GND
D9
GND
D10
GND
D11
GND
D12
GND
E1
GND
E2
GND
E3
GND
E4
GND
E10
GND
E11
GND
E12
GND
F1
GND
F2
GND
F3
GND
F10
GND
F11
GND
F12
GND
G1
GND
G3
GND
G10
GND
G12
GND
H1
GND
H2
GND
H3
GND
H4
GND
H5
GND
H6
GND
H7
GND
H9
GND
H10
GND
H11
GND
H12
GND
M12
GND
M1
GND
L12
GND
J1
GND
J5
GND
J8
GND
J12
GND
K1
GND
K5
GND
K6
GND
K7
GND
K8
GND
K12
GND
L1
SGND
C7
SGND
D6
SGND
F6
SGND
F7
SGND
G6
SGND
G7
FSET
C6
PHASMD
G4
DIFFP
E8
DIFFN
E9
CLKOUT
G5
MO
DE
-P
LLIN
F4
TEMP
J6
INTVCC
H8
EXTVCC
J7
DIFFOUT
F8
R24
10
CIN4 22uF
25V 1210
C11
OPT
C4
150pF
R16
*
1%
R10
*
1%
R14 100
R3 100
J1
VIN
1
VIN
2
VIN
3
VIN
4
GND
5
GND
6
GND
7
GND
8
GND
9
GND
10
GND
11
GND
12
GND
13
GND
14
N/A
15
N/A
16
GND
17
GND
18
VOS1+
19
GND
20
VOS1-
21
RUN1
22
VOS2+
23
RUN2
24
VOUT1
25
VOUT1
26
VOUT1
27
VOUT1
28
VOUT1
29
VOUT1
30
VOUT1
31
VOUT1
32
VOUT2
33
VOUT2
34
VOUT2
35
VOUT2
36
VOUT2
37
VOUT2
38
VOUT2
39
VOUT2
40
R20 OPT
R22 0
P3
CIN3 22uF
25V 1210
R13 OPT
R17
10K
+
CO5 470uF
6.3V
R7
*
1%
R8
OPT
C2 OPT
L1
1uH
C16 10uF
25V
R2
0
R6
10K
C15
*
CO4 100uF
6.3V 1210
C18 22uF
C3 OPT
C17 10uF
25V
CO3 100uF
6.3V 1210
CIN5 22uF
25V 1210
P1
R25
10
R26
OPT
R4
121K
1%
C8 0.1uF
C12
*
C13
150pF
R5 100
C20 22uF
R9 0
C10 OPT
4.7uF
C6
6.3V
C14 0.1uF
R30
10
R28
OPT
R19 OPT
R18
*
1%
R27
OPT
R29
OPT
