8
dc1759af
DEMO MANUAL DC1759A
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
VI
N
+
VI
N
-
VI
N
GN
D
5.5V
-16V
VO
U
T
1
GN
D
VO
1
+
VO
1
-
3.3V
/ 13A
5V
/ 13A
GN
D
VO
2
-
VO
2
+
VO
U
T
2
ON
TR
A
C
K
1
CLK
O
UT
PH
ASE
120
90
60
o
o
o
ON
EXT
.
SO
F
T
-ST
AR
T
T
R
AC
K1
SEL
.
NOT
E
: UNL
ESS OT
HERWISE SPECIF
IED
1. A
L
L
R
E
SIST
OR
S A
R
E
IN
OH
M
S
, 0603.
ALL CAP
ACI
TO
RS
ARE
IN
MI
CRO
FARADS
, 0603.
TTTT
VO
U
T
1
VI
N
INTV
CC
VO
1
+
VO
1
-
INTV
CC
VO
1
-
VO
1
+
INTV
CC
INTV
CC
VO
U
T
1
VO
2
+
VO
2
-
VI
N
INTV
CC
D
IFFP
CO
M
P
1
VF
B1
D
IFFN
DIF
F
O
UT
VO
U
T
1
S
VO
U
T
1
T
R
AC
K1
RUN1
VO
2
+
VO
U
T
2
VO
2
-
VO
U
T
2
S
RUN2
T
R
AC
K2
VF
B2
CO
M
P
2
INTV
CC
TE
M
P
R
EVISION
H
IST
OR
Y
DESCRIPT
IO
N
DAT
E
APPRO
VED
ECO
R
EV
PRODUCTION
2
11-15-12
__
JI
AN L.
R
EVISION
H
IST
OR
Y
DESCRIPT
IO
N
DAT
E
APPRO
VED
ECO
R
EV
PRODUCTION
2
11-15-12
__
JI
AN L.
R
EVISION
H
IST
OR
Y
DESCRIPT
IO
N
DAT
E
APPRO
VED
ECO
R
EV
PRODUCTION
2
11-15-12
__
JI
AN L.
SI
ZE
DATE:
IC NO
.
R
EV.
SHEET
OF
TITLE:
A
PPR
OVA
L
S
P
CB DE
S
.
A
PP EN
G
.
T
E
C
HNO
L
O
G
Y
F
ax:
(
408)
434-
0507
M
il
p
it
as,
C
A
95035
Phone: (408)432-1900
1630 M
cC
ar
thy B
lvd.
LTC Conf
id
ent
ial
-F
or
Cust
om
er
Use O
n
ly
CUST
O
M
E
R NO
T
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
U
P
P
L
IE
D S
P
E
C
IF
ICAT
IO
NS
;
H
O
WEVER
, I
T
R
E
M
A
IN
S T
H
E C
U
S
T
O
M
E
R
'S R
ESPO
N
S
IB
IL
IT
Y T
O
V
E
R
IF
Y
P
R
O
P
E
R
AND RE
L
IABL
E
O
P
E
RAT
IO
N I
N
T
H
E
ACT
UAL
AP
P
L
ICAT
IO
N.
CO
M
P
O
N
E
N
T
S
UBS
T
IT
U
T
IO
N
AND P
R
IN
T
E
D
CI
RCUI
T
BO
ARD L
A
Y
O
UT
M
A
Y
S
IG
N
IF
ICANT
L
Y
AF
F
E
CT
CI
RCUI
T
P
E
R
F
O
RM
ANCE
O
R
RE
L
IABI
L
IT
Y
. CO
NT
ACT
L
INE
AR
T
E
CHNO
L
O
G
Y
AP
P
L
ICAT
IO
NS
E
N
G
INE
E
R
IN
G
F
O
R AS
S
IS
T
ANCE
.
T
H
IS
CI
RCUI
T
IS
P
R
O
P
RI
E
T
ARY
T
O
L
INE
AR T
E
CHNO
L
O
G
Y
AND
SCHEMATIC
S
U
P
P
L
IE
D F
O
R US
E
W
IT
H
L
INE
AR T
E
CHNO
L
O
G
Y
P
ART
S
.
SCALE = NONE
www.lin
ear
.co
m
2
Thursday, November 15, 2012
12
HIG
H
EF
F
ICIENCY, DUAL
1
3A
ST
EP-
DO
WN M
O
DUL
E REG
U
L
A
T
O
R
LT
JI
AN L
.
N/A
L
T
M
4620AEV
DEMO
CIRCUIT
1759A
SI
ZE
DATE:
IC NO
.
R
EV.
SHEET
OF
TITLE:
A
PPR
OVA
L
S
P
CB DE
S
.
A
PP EN
G
.
T
E
C
HNO
L
O
G
Y
F
ax:
(
408)
434-
0507
M
il
p
it
as,
C
A
95035
Phone: (408)432-1900
1630 M
cC
ar
thy B
lvd.
LTC Conf
id
ent
ial
-F
or
Cust
om
er
Use O
n
ly
CUST
O
M
E
R NO
T
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
U
P
P
L
IE
D S
P
E
C
IF
ICAT
IO
NS
;
H
O
WEVER
, I
T
R
E
M
A
IN
S T
H
E C
U
S
T
O
M
E
R
'S R
ESPO
N
S
IB
IL
IT
Y T
O
V
E
R
IF
Y
P
R
O
P
E
R
AND RE
L
IABL
E
O
P
E
RAT
IO
N I
N
T
H
E
ACT
UAL
AP
P
L
ICAT
IO
N.
CO
M
P
O
N
E
N
T
S
UBS
T
IT
U
T
IO
N
AND P
R
IN
T
E
D
CI
RCUI
T
BO
ARD L
A
Y
O
UT
M
A
Y
S
IG
N
IF
ICANT
L
Y
AF
F
E
CT
CI
RCUI
T
P
E
R
F
O
RM
ANCE
O
R
RE
L
IABI
L
IT
Y
. CO
NT
ACT
L
INE
AR
T
E
CHNO
L
O
G
Y
AP
P
L
ICAT
IO
NS
E
N
G
INE
E
R
IN
G
F
O
R AS
S
IS
T
ANCE
.
T
H
IS
CI
RCUI
T
IS
P
R
O
P
RI
E
T
ARY
T
O
L
INE
AR T
E
CHNO
L
O
G
Y
AND
SCHEMATIC
S
U
P
P
L
IE
D F
O
R US
E
W
IT
H
L
INE
AR T
E
CHNO
L
O
G
Y
P
ART
S
.
SCALE = NONE
www.lin
ear
.co
m
2
Thursday, November 15, 2012
12
HIG
H
EF
F
ICIENCY, DUAL
1
3A
ST
EP-
DO
WN M
O
DUL
E REG
U
L
A
T
O
R
LT
JI
AN L
.
N/A
L
T
M
4620AEV
DEMO
CIRCUIT
1759A
SI
ZE
DATE:
IC NO
.
R
EV.
SHEET
OF
TITLE:
A
PPR
OVA
L
S
P
CB DE
S
.
A
PP EN
G
.
T
E
C
HNO
L
O
G
Y
F
ax:
(
408)
434-
0507
M
il
p
it
as,
C
A
95035
Phone: (408)432-1900
1630 M
cC
ar
thy B
lvd.
LTC Conf
id
ent
ial
-F
or
Cust
om
er
Use O
n
ly
CUST
O
M
E
R NO
T
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
U
P
P
L
IE
D S
P
E
C
IF
ICAT
IO
NS
;
H
O
WEVER
, I
T
R
E
M
A
IN
S T
H
E C
U
S
T
O
M
E
R
'S R
ESPO
N
S
IB
IL
IT
Y T
O
V
E
R
IF
Y
P
R
O
P
E
R
AND RE
L
IABL
E
O
P
E
RAT
IO
N I
N
T
H
E
ACT
UAL
AP
P
L
ICAT
IO
N.
CO
M
P
O
N
E
N
T
S
UBS
T
IT
U
T
IO
N
AND P
R
IN
T
E
D
CI
RCUI
T
BO
ARD L
A
Y
O
UT
M
A
Y
S
IG
N
IF
ICANT
L
Y
AF
F
E
CT
CI
RCUI
T
P
E
R
F
O
RM
ANCE
O
R
RE
L
IABI
L
IT
Y
. CO
NT
ACT
L
INE
AR
T
E
CHNO
L
O
G
Y
AP
P
L
ICAT
IO
NS
E
N
G
INE
E
R
IN
G
F
O
R AS
S
IS
T
ANCE
.
T
H
IS
CI
RCUI
T
IS
P
R
O
P
RI
E
T
ARY
T
O
L
INE
AR T
E
CHNO
L
O
G
Y
AND
SCHEMATIC
S
U
P
P
L
IE
D F
O
R US
E
W
IT
H
L
INE
AR T
E
CHNO
L
O
G
Y
P
ART
S
.
SCALE = NONE
www.lin
ear
.co
m
2
Thursday, November 15, 2012
12
HIG
H
EF
F
ICIENCY, DUAL
1
3A
ST
EP-
DO
WN M
O
DUL
E REG
U
L
A
T
O
R
LT
JI
AN L
.
N/A
L
T
M
4620AEV
DEMO
CIRCUIT
1759A
E4E4
J6J6
R16
OP
T
R16
OP
T
J7J7
JP3
OFF
RUN2
JP3
OFF
RUN2
1
3
2
E1
5
TE
M
P
E1
5
TE
M
P
E7E7
CO
UT
3
OP
T
CO
UT
3
OP
T
C10
OP
T
C10
OP
T
R19
8.25K
R19
8.25K
C5
0.1uF
C5
0.1uF
R3
10
R3
10
J4J4
E1E1
CIN4
22uF
1210
25V
CIN4
22uF
1210
25V
CO
UT
2
OP
T
CO
UT
2
OP
T
CO
UT
6
OP
T
CO
UT
6
OP
T
+
CO
UT
1
330uF
6.3V
+
CO
UT
1
330uF
6.3V
C4
OP
T
C4
OP
T
C3
OP
T
C3
OP
T
R10
6.04K
R10
6.04K
JP1
E
X
T
_CLK
PS
CCM
MO
D
E
BM
JP1
E
X
T
_CLK
PS
CCM
MO
D
E
BM
1
3
2
4
6
5
7
8
J5J5
R30
191K
R30
191K
J8J8
U1
LTM
4620A
E
V
U1
LTM
4620A
E
V
VIN
J9
VIN
J10
VIN
J11
VIN
K2
VIN
K3
VIN
K4
VIN
K9
VIN
K10
VIN
K11
VIN
M2
VIN
M3
VIN
M4
VIN
M5
VIN
M6
VIN
M7
VIN
M8
VIN
M9
VIN
M1
0
VIN
M1
1
VIN
L2
VIN
L3
VIN
L4
VIN
L5
VIN
L6
VIN
L7
VIN
L8
VIN
L9
VIN
L10
VIN
L11
VIN
J2
VIN
J3
VIN
J4
RUN1
F5
TR
A
C
K
1
E5
VO
U
T
1
S
C5
VO
U
T
1
A1
VO
U
T
1
A2
VO
U
T
1
A3
VO
U
T
1
A4
VO
U
T
1
A5
VF
B1
D5
SW
1
G2
P
GOOD
1
G9
CO
M
P
1
E6
DIF
F
O
UT
F8
DIFFN
E9
DIFFP
E8
FSET
C6
PHASM
D
G4
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
G10
GND
G12
GND
H1
GND
H2
GN
D
H3
GN
D
H4
GN
D
H5
GN
D
H6
GN
D
H7
GN
D
H9
GN
D
H1
0
GN
D
H1
1
GN
D
H1
2
GN
D
J1
GN
D
J5
GN
D
J8
GN
D
J1
2
GN
D
K1
GN
D
K5
GN
D
K6
GN
D
K7
GN
D
K8
GN
D
K1
2
GN
D
L1
GN
D
L12
GN
D
M1
GN
D
M1
2
SG
N
D
C7
SG
N
D
D6
SG
N
D
F6
SG
N
D
F7
SG
N
D
G6
SG
N
D
G7
VO
U
T
1
B1
VO
U
T
1
B2
VO
U
T
1
B3
VO
U
T
1
B4
VO
U
T
1
B5
VO
U
T
1
C1
VO
U
T
1
C2
VO
U
T
1
C3
VO
U
T
1
C4
CO
M
P
2
E7
P
GOOD
2
G8
SW
2
G11
VF
B2
D7
T
R
AC
K2
D8
RUN2
F9
VO
U
T
2
S
C8
TEMP
J6
MO
DE
-PLLI
N
F4
CLK
OUT
G5
INTV
CC
H8
EXTVC
C
J7
VOU
T2
A8
VOU
T2
A9
VOU
T2
A10
VOU
T2
A11
VOU
T2
A12
VOU
T2
B8
VOU
T2
B9
VOU
T2
B10
VOU
T2
B11
VOU
T2
B12
VOU
T2
C9
VOU
T2
C10
VOU
T2
C11
VOU
T2
C12
GND
G3
JP5
VO
U
T
1
T
R
AC
K2
SEL
.
JP5
VO
U
T
1
T
R
AC
K2
SEL
.
1
3
2
4
5
6
C7
0.1uF
C7
0.1uF
E1
2
P
GOOD
2
E1
2
P
GOOD
2
E1
3
EXT
VC
C
E1
3
EXT
VC
C
CIN3
22uF 25V
1210
CIN3
22uF 25V
1210
R15
60.4K
R15
60.4K
R32
0
R32
0
R1
10
R1
10
C6
33pF
C6
33pF
E6E6
CIN2
22uF 25V
1210
CIN2
22uF 25V
1210
R21
0
R21
0
CO
UT
4
100uF 6.3V
CO
UT
4
100uF 6.3V
E1
4
CLK
O
UT
E1
4
CLK
O
UT
R7
0
R7
0
CO
UT
8
OP
T
CO
UT
8
OP
T
C1
OP
T
C1
OP
T
R22
10
R22
10
J9J9
C2
1uF
C2
1uF
R20
OP
T
R20
OP
T
E8E8
R2
OP
T
R2
OP
T
R6
OP
T
R6
OP
T
R24
10K
R24
10K
C12
OP
T
C12
OP
T
R27
10K
R27
10K
+
CO
UT
7
330uF
6.3V
+
CO
UT
7
330uF
6.3V
CIN5
22uF 25V
1210
CIN5
22uF 25V
1210
JP2
OFF
RUN1
JP2
OFF
RUN1
1
3
2
R5
10K
R5
10K
R8
OP
T
R8
OP
T
C11
OP
T
C11
OP
T
JP6JP6
1
3
2
4
R18
60.4K
R18
60.4K
E1
0
T
R
AC
K2
E1
0
T
R
AC
K2
R9
60.4K
R9
60.4K
+
CIN1
150uF
25V
+
CIN1
150uF
25V
E9E9
TP
1
SW1
TP
1
SW1
R12
60.4K
R12
60.4K
C8
OP
T
C8
OP
T
E3
P
GOOD
1
E3
P
GOOD
1
C9
47pF
C9
47pF
R26
10
R26
10
JP4
SO
F
T
-ST
AR
T
TR
A
C
K
JP4
SO
F
T
-ST
AR
T
TR
A
C
K
1
3
2
E5E5
CO
UT
5
100uF
6.3V
CO
UT
5
100uF
6.3V
R13
6.04K
R13
6.04K
E1
6
CLK
IN
E1
6
CLK
IN
R29
0
R29
0
TP
2
SW2
TP
2
SW2
R25
13.3K
R25
13.3K
R4
OP
T
R4
OP
T
SCHEMATIC DIAGRAM
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from