DC1310A - Schematic

A
B
C
TP3
TP2
3
15
20
2
1
1
TRACK
J3
TRACK/SS
RSS1
4.87M
1%
RTR1
TP7
100k
1% RTR2
opt.
1%
INT SS 1
2
TRACK 3
4
EXT SS 5
CSS1
0.01uF
16
Track/SS
DDR
Mode
RSD1
4.87M
1%
J2
2
SW
SW
SW
SW
5
6
11
12
Ith
19
Run
17
RUN
ON
OFF
NC
NC
NC
4
7
10
Vfb
18
1
2
6
R2
Rt
3
4
EXT
SYNC
5
6
RT2
opt.
1%
J6
Rt / SYNC
RM1
4.87M
1%
2
(FORCED CONTINUOUS
MODE)
FCM
RT1
165K
1%
J1
MODE
1
2
(PULSE-SKIP MODE)
PSM
3
4
(BURST MODE
EXTERNAL CLAMP)
(BURST MODE)
BMEC
5
6
BM
7
8
C1
10pF
COUT4
100uF
6.3V
opt.
TP4
COUT5
+ COUT6
10uF
100uF
6.3V
opt.
TP5
1.2V
GND
JP2
2
ON
3
4
OFF
52.3K
1%
RM5
opt.
1%
R5
JP4
36.5k
1%
R6
JP5
R4
R1
165k
1%
1.8V
Voutset
JP3
2.5V
RM3
301k
1%
3.3V
TP6
TP9
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.
C
2
RM4
100k
1%
CONTRACT NO.
APPROVALS
DRAWN
Antonina K.
DATE
7/13/09
CHECKED
APPROVED
ENGINEER
GND
3
VBMCV
(Vout Burst Mode Clamp Voltage)
CUSTOMER NOTICE
GND
USER SELECT
SET EXT
B
COUT3
100uF
6.3V
opt.
CITH1
1000pF
JP1
J9
1
TP10
(Burst Mode External
Clamp Voltage)
COUT2
33uF
6.3V
CFF1
22pF
1
opt.
BMECV
A
COUT1
33uF
6.3V
RITH1
15k
1%
82.5K
1%
RM2
4.87M
1%
SYNC
TP8
CC1
opt.
165K
1%
J4
DDR
4
VOUT
3A
3
R3
INT
SYNC
L1
0.47uH
VISHAY
IHLP2020BZERR47M01
2
RFILT1
24
PVin
PVin
PVin_d
SVin
SGND
8
9
13
14
CFILT1
1uF
EXT
1
3
CIN1
22uF
6.3V
PGood
CIN2
22uF
6.3V
PGND
GND
CIN4
100uF
opt.
INT
LTC3612EUDC
21
CIN3 +
100uF
10V
Rt/Sync
VIN
U1
2
TP1
2.25V - 5.5V
3
RPG1
100k
5%
4
1
E
J5
COMP
PGOOD
3
D
T. Gross
7/13/09
DESIGNER
Tuesday, July 21, 2009
TECHNOLOGY
TITLE
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
LTC3612EUDC
3A Monolithic Synchronous Step-Down Regulator
SIZE CAGE CODE
FILENAME:
SCALE:
D
DWG NO
REV
2
DC1310A
SHEET
1
E
1
OF
1
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