5
dc1900af
DEMO MANUAL DC1900A
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
4V
-
14V
G
ND
V
O
U
T3
G
ND
CL
KI
N
T
RACK2
VIN
1
.5
V
/
4
A
M
A
X
1
.2
V
/
4
A
M
A
X
V
O
U
T4
G
ND
3
.3
V
/ 4
A
M
A
X
V
O
U
T1
G
ND
2
.5
V
/ 4
A
M
A
X
V
O
U
T2
G
ND
TE
M
P
ON
O
FF
ON
O
FF
ON
O
FF
ON
O
FF
T
RACK1
T
RACK3
T
RACK4
O
PT
IO
N
A
L
J
U
M
PER
S
F
O
R
P
ARAL
L
E
L
O
P
E
RAT
IO
N
CCM
DCM
7343
7343
7343
RUN1
RUN2
RUN3
RUN4
7343
7343
121
0
121
0
121
0
121
0
VI
N
+
G
ND
N
O
T
E
:
U
N
L
E
S
S
O
T
H
E
R
W
IS
E
S
P
E
C
IF
IE
D
1. A
LL
R
E
S
IS
TO
R
S
A
R
E
IN
O
H
M
S
, 0
60
3.
A
LL
C
A
P
A
C
IT
O
R
S
A
R
E
0
60
3.
M
O
D
E4
CCM
DCM
M
O
D
E3
CCM
DCM
M
O
D
E2
CCM
DCM
M
O
D
E1
VIN
V
O
U
T3
INT
V
CC3
INT
V
CC4
V
O
U
T4
INT
V
CC1
SS1
FB
1
V
O
U
T1
C
O
M
P1
INT
V
CC2
SS2
C
O
M
P2
SS3
SS4
FB
1
FB
3
FB
4
FB
2
FB
2
FB
3
C
O
M
P2
C
O
M
P3
C
O
M
P1
C
O
M
P3
C
O
M
P4
C
O
M
P2
SS2
SS3
SS1
SS3
SS4
SS2
RUN2
RUN3
RUN1
RUN3
RUN4
RUN2
C
O
M
P4
C
O
M
P3
V
O
U
T2
V
O
U
T3
V
O
U
T1
V
O
U
T3
V
O
U
T4
V
O
U
T2
FB
2
FB
4
FB
3
V
O
U
T2
INT
V
CC1
INT
V
CC2
INT
V
CC3
INT
V
CC4
VI
N
RUN1
RUN2
RUN3
RUN4
RUN1
RUN2
RUN3
RUN4
INT
V
CC4
INT
V
CC3
INT
V
CC1
INT
V
CC2
S
IZE
DAT
E
:
IC
N
O
.
R
EV.
SH
EET
O
F
TI
TLE
:
AP
P
RO
V
AL
S
P
CB
DE
S
.
A
P
P
E
N
G
.
T
E
CHNO
L
O
G
Y
F
ax:
(
408
)43
4-
05
07
M
ilp
it
as
, C
A
95
035
P
h
o
n
e:
(
408)
432-
1900
163
0
M
cC
ar
th
y
B
lv
d
.
LTC
C
onf
ide
nt
ia
l-
Fo
r
C
us
to
m
er
U
se
O
nl
y
CUS
T
OM
E
R
NOT
ICE
L
INE
AR
T
E
CHNO
L
O
G
Y
HAS
M
ADE
A
BE
S
T
E
F
F
O
RT
T
O
DE
S
IG
N
A
CI
RCUI
T
T
HAT
M
E
E
T
S
CUS
T
O
M
E
R-
S
UP
P
L
IE
D
S
P
E
CI
F
ICAT
IO
NS
;
H
O
W
E
V
E
R
, I
T
R
E
M
A
IN
S
T
H
E
C
U
S
T
O
M
E
R
'S
R
E
S
P
O
N
S
IB
IL
IT
Y
T
O
V
E
RI
F
Y
P
RO
P
E
R
AND
RE
L
IABL
E
O
P
E
RAT
IO
N
IN
T
HE
ACT
UAL
AP
P
L
ICAT
IO
N.
CO
M
P
O
NE
NT
S
UBS
T
IT
UT
IO
N
AND
P
RI
NT
E
D
CI
RCUI
T
BO
ARD
L
AY
O
UT
M
AY
S
IG
NI
F
ICANT
L
Y
AF
F
E
CT
CI
RCU
IT
P
E
RF
O
RM
ANCE
O
R
RE
L
IABI
L
IT
Y
.
CO
NT
ACT
L
INE
AR
T
E
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L
O
G
Y
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P
L
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IO
NS
E
NG
INE
E
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NG
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O
R
AS
S
IS
T
ANCE
.
T
HI
S
CI
RCUI
T
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RO
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RI
E
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ARY
T
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L
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T
E
CHNO
L
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G
Y
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D
S
CHE
M
AT
IC
S
UP
P
L
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D
F
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R
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E
W
IT
H
L
INE
AR
T
E
CHNO
L
O
G
Y
P
ART
S
.
S
CAL
E
=
NO
NE
w
w
w
.lin
ea
r.c
o
m
3
L
T
M
4644E
Y
T
u
esd
ay,
A
p
ri
l 23,
2013
1
1
Q
UAD
4A
S
T
E
P
-DO
W
N
M
O
DUL
E
RE
G
UL
AT
O
R
LT
S
A
M
Y
.
N/
A
DE
M
O
CI
RCUI
T
1
90
0A
S
IZE
DAT
E
:
IC
N
O
.
R
EV.
SH
EET
O
F
TI
TLE
:
AP
P
RO
V
AL
S
P
CB
DE
S
.
A
P
P
E
N
G
.
T
E
CHNO
L
O
G
Y
F
ax:
(
408
)43
4-
05
07
M
ilp
it
as
, C
A
95
035
P
h
o
n
e:
(
408)
432-
1900
163
0
M
cC
ar
th
y
B
lv
d
.
LTC
C
onf
ide
nt
ia
l-
Fo
r
C
us
to
m
er
U
se
O
nl
y
CUS
T
OM
E
R
NOT
ICE
L
INE
AR
T
E
CHNO
L
O
G
Y
HAS
M
ADE
A
BE
S
T
E
F
F
O
RT
T
O
DE
S
IG
N
A
CI
RCUI
T
T
HAT
M
E
E
T
S
CUS
T
O
M
E
R-
S
UP
P
L
IE
D
S
P
E
CI
F
ICAT
IO
NS
;
H
O
W
E
V
E
R
, I
T
R
E
M
A
IN
S
T
H
E
C
U
S
T
O
M
E
R
'S
R
E
S
P
O
N
S
IB
IL
IT
Y
T
O
V
E
RI
F
Y
P
RO
P
E
R
AND
RE
L
IABL
E
O
P
E
RAT
IO
N
IN
T
HE
ACT
UAL
AP
P
L
ICAT
IO
N.
CO
M
P
O
NE
NT
S
UBS
T
IT
UT
IO
N
AND
P
RI
NT
E
D
CI
RCUI
T
BO
ARD
L
AY
O
UT
M
AY
S
IG
NI
F
ICANT
L
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CT
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IT
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E
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ANCE
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RE
L
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NT
ACT
L
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L
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R
AS
S
IS
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ANCE
.
T
HI
S
CI
RCUI
T
IS
P
RO
P
RI
E
T
ARY
T
O
L
INE
AR
T
E
CHNO
L
O
G
Y
AN
D
S
CHE
M
AT
IC
S
UP
P
L
IE
D
F
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R
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E
W
IT
H
L
INE
AR
T
E
CHNO
L
O
G
Y
P
ART
S
.
S
CAL
E
=
NO
NE
w
w
w
.lin
ea
r.c
o
m
3
L
T
M
4644E
Y
T
u
esd
ay,
A
p
ri
l 23,
2013
1
1
Q
UAD
4A
S
T
E
P
-DO
W
N
M
O
DUL
E
RE
G
UL
AT
O
R
LT
S
A
M
Y
.
N/
A
DE
M
O
CI
RCUI
T
1
90
0A
S
IZE
DAT
E
:
IC
N
O
.
R
EV.
SH
EET
O
F
TI
TLE
:
AP
P
RO
V
AL
S
P
CB
DE
S
.
A
P
P
E
N
G
.
T
E
CHNO
L
O
G
Y
F
ax:
(
408
)43
4-
05
07
M
ilp
it
as
, C
A
95
035
P
h
o
n
e:
(
408)
432-
1900
163
0
M
cC
ar
th
y
B
lv
d
.
LTC
C
onf
ide
nt
ia
l-
Fo
r
C
us
to
m
er
U
se
O
nl
y
CUS
T
OM
E
R
NOT
ICE
L
INE
AR
T
E
CHNO
L
O
G
Y
HAS
M
ADE
A
BE
S
T
E
F
F
O
RT
T
O
DE
S
IG
N
A
CI
RCUI
T
T
HAT
M
E
E
T
S
CUS
T
O
M
E
R-
S
UP
P
L
IE
D
S
P
E
CI
F
ICAT
IO
NS
;
H
O
W
E
V
E
R
, I
T
R
E
M
A
IN
S
T
H
E
C
U
S
T
O
M
E
R
'S
R
E
S
P
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N
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Y
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RO
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AND
RE
L
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IO
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T
HE
ACT
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AP
P
L
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IO
N.
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M
P
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NE
NT
S
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T
IT
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ARD
L
AY
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AY
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RO
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RI
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T
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AR
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L
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.
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CAL
E
=
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NE
w
w
w
.lin
ea
r.c
o
m
3
L
T
M
4644E
Y
T
u
esd
ay,
A
p
ri
l 23,
2013
1
1
Q
UAD
4A
S
T
E
P
-DO
W
N
M
O
DUL
E
RE
G
UL
AT
O
R
LT
S
A
M
Y
.
N/
A
DE
M
O
CI
RCUI
T
1
90
0A
RE
V
IS
IO
N
HI
S
T
O
RY
DES
CRI
PT
IO
N
DAT
E
A
P
PR
O
V
ED
E
CO
RE
V
SA
M
Y.
P
RO
DUCT
IO
N
3
04-
23-
13
_
RE
V
IS
IO
N
HI
S
T
O
RY
DES
CRI
PT
IO
N
DAT
E
A
P
PR
O
V
ED
E
CO
RE
V
SA
M
Y.
P
RO
DUCT
IO
N
3
04-
23-
13
_
RE
V
IS
IO
N
HI
S
T
O
RY
DES
CRI
PT
IO
N
DAT
E
A
P
PR
O
V
ED
E
CO
RE
V
SA
M
Y.
P
RO
DUCT
IO
N
3
04-
23-
13
_
J
P3
J
P3
1
2
3
R2
5
100K 1%
R2
5
100K 1%
R2
0
150K
R2
0
150K
+
C8
O
PT
+
C8
O
PT
J
P7
J
P7
1
2
3
J
P1
J
P1
1
2
3
R8
0
R8
0
R1
10K
R1
10K
E4E4
R3
8
O
PT
R3
8
O
PT
R1
8
O
PT
R1
8
O
PT
C2
2
O
PT
C2
2
O
PT
R3
9
O
PT
R3
9
O
PT
C4
22u
F
25V 1206
C4
22u
F
25V 1206
C2
5
0.
1u
F
C2
5
0.
1u
F
TP
2
P
GOOD
2
TP
2
P
GOOD
2
C3
0
O
PT
1206
C3
0
O
PT
1206
R4
5
O
PT
R4
5
O
PT
R1
2
60.
4K
R1
2
60.
4K
R3
5
O
PT
R3
5
O
PT
E7E7
C3
2
100p
F
C3
2
100p
F
C5
22u
F
25V 1206
C5
22u
F
25V 1206
R2
8
0
0805
R2
8
0
0805
R4
6
O
PT
2512
R4
6
O
PT
2512
+
C3
7
O
PT
+
C3
7
O
PT
C2
1
O
PT
C2
1
O
PT
TP
1
P
GOOD
1
TP
1
P
GOOD
1
R1
0
O
PT
R1
0
O
PT
J
P5
J
P5
1
2
3
C4
1
O
PT
C4
1
O
PT
J
P2
J
P2
1
2
3
J
P8
J
P8
1
2
3
+
C1
8
O
PT
+
C1
8
O
PT
C3
22u
F
25V 1206
C3
22u
F
25V 1206
C1
3
100p
F
C1
3
100p
F
E1
1
E1
1
J2J2
C3
8
O
PT
1206
C3
8
O
PT
1206
TP
3
P
GOOD
3
TP
3
P
GOOD
3
E1
0
E1
0
C1
4
O
PT
1206
C1
4
O
PT
1206
C4
6
0.
1u
F
C4
6
0.
1u
F
J
P4
J
P4
1
2
3
C2
6
0.
1u
F
C2
6
0.
1u
F
C9
47u
F
6.
3V
C9
47u
F
6.
3V
R2
6
100K 1%
R2
6
100K 1%
R4
4
O
PT
R4
4
O
PT
R2
1
150K
R2
1
150K
R1
9
150K
R1
9
150K
E9E9
C2
8
47u
F
6.
3V
C2
8
47u
F
6.
3V
C4
2
O
PT
C4
2
O
PT
R1
7
O
PT
R1
7
O
PT
R2
7
100K
R2
7
100K
E8E8
R2
4
100K 1%
R2
4
100K 1%
E3E3
C1
1
O
PT
1206
C1
1
O
PT
1206
R3
4
O
PT
R3
4
O
PT
R3
0
100K
R3
0
100K
R7
0
R7
0
C4
5
0.
1u
F
C4
5
0.
1u
F
C1
2
O
PT
1206
C1
2
O
PT
1206
R3
3
O
PT
R3
3
O
PT
E1
5
E1
5
R3
6
O
PT
2512
R3
6
O
PT
2512
R1
1
19.
1K
R1
1
19.
1K
R4
1
O
PT
2512
R4
1
O
PT
2512
TP
4
P
GOOD
4
TP
4
P
GOOD
4
R2
3
100K 1%
R2
3
100K 1%
E1E1
R2
9
100K
R2
9
100K
E1
7
E1
7
R4
0
O
PT
R4
0
O
PT
J
P6
J
P6
1
2
3
C2
9
47u
F
6.
3V
1206
C2
9
47u
F
6.
3V
1206
C1
6
47u
F
6.
3V
1206
C1
6
47u
F
6.
3V
1206
E1
4
E1
4
C1
0
47u
F
6.
3V
1206
C1
0
47u
F
6.
3V
1206
TP
5
CL
KO
UT
TP
5
CL
KO
UT
C3
6
47u
F
6.
3V
C3
6
47u
F
6.
3V
E1
6
E1
6
R9 O
PT
R9 O
PT
L
T
M
4644E
Y
U1
L
T
M
4644E
Y
U1
GND
B2
V
O
U
T1
A1
V
O
U
T3
F1
V
O
U
T4
J1
V
O
U
T2
C1
GND
D3
GND
A4
PGOOD
2
C2
PGOOD
3
F2
PGOOD
4
J2
PGOOD
1
C3
TEM
P
F3
CLKO
UT
J3
INT
V
CC1
C4
INT
V
CC2
F4
INT
V
CC3
J4
INT
V
CC4
K5
T
RACK/
S
S
1
A6
M
O
D
E1
B6
RUN1
C6
T
RACK/
S
S
2
D6
M
O
D
E2
E6
RUN2
F6
T
RACK/
S
S
4
K6
M
O
D
E4
L6
RUN4
K7
FB
4
J7
T
RACK/
S
S
3
G6
M
O
D
E3
H6
RUN3
J6
FB
1
A7
C
O
M
P1
B7
CLKI
N
C7
FB
2
D7
C
O
M
P2
E7
SGN
D
F7
FB
3
G7
C
O
M
P3
H7
C
O
M
P4
L7
VIN
1
B3
VIN
2
E3
VIN
3
H3
VIN
4
L3
SVIN1
B5
SVIN2
E5
SVIN3
H5
SVIN4
L5
GND
A5
GND
B1
V
O
U
T1
A2
V
O
U
T1
A3
VIN
3
H4
VIN
4
L4
VIN
2
E4
VIN
1
B4
V
O
U
T3
G1
V
O
U
T3
G2
V
O
U
T4
K2
V
O
U
T4
K1
GND
L1
GND
H1
GND
E1
GND
E2
GND
H2
GND
L2
GND
G3
GND
K3
GND
D4
GND
G4
GND
K4
GND
C5
GND
D5
GND
F5
GND
G5
GND
J5
V
O
U
T2
D2
V
O
U
T2
D1
E6E6
R3
1
100K
R3
1
100K
E1
3
E1
3
R4 40.
2K
R4 40.
2K
C6
1
uF
C6
1
uF
C1
5
O
PT
1206
C1
5
O
PT
1206
C3
4
O
PT
1206
C3
4
O
PT
1206
C3
1
O
PT
C3
1
O
PT
C1
7
47u
F
6.
3V
C1
7
47u
F
6.
3V
C1
22u
F
25V 1206
C1
22u
F
25V 1206
E5E5
+
C2 68u
F
16V
+
C2 68u
F
16V
R4
3
O
PT
R4
3
O
PT
E1
2
E1
2
J1J1
R3
7
O
PT
R3
7
O
PT
R1
6
0
R1
6
0
C3
3
O
PT
1206
C3
3
O
PT
1206
R3
2
O
PT
R3
2
O
PT
R3
13.
3K
R3
13.
3K
R1
5
0
R1
5
0
R2
2
150K
R2
2
150K
C3
5
47u
F
6.
3V
1206
C3
5
47u
F
6.
3V
1206
R4
2
O
PT
R4
2
O
PT
+
C2
7
O
PT
+
C2
7
O
PT
C7 O
PT
C7 O
PT
R2
1
R2
1
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