DC1454A - Schematic

5
4
3
2
1
REVISION HISTORY
PGOOD
E6
D
ECO
REV
1
1
DESCRIPTION
PRODUCTION
APPROVED
DATE
TOM GROSS
08-14-09
INTVCC
E1
R1
D
INTVcc
100K
C1
E7
R9
1
TRACK
0 Ohm
JP5
TRACK
3
R10
(Opt)
2.2uF
16V
U1
LTC3601EMSE 16
2
4
11
SS
(SOFT-START)
15
C
13
14
INTVcc
3
4
(FORCE CONTINUOUS MODE) FCM 5
6
SYNC
C6
22uF
16V
1210
(Opt)
MODE/SYNC
1
2
BURST MODE
SYNC
E8
6
PGOOD
C9
2200pF
D1
CMDSH-3TR
(Opt)
C3
22uF
16V
1210
12
C8
0.1uF
25V
5
INTVCC
BOOST
SW
SW
1
2
VON
7
TRACK
MODE/SYNC
VIN
VIN
FB
RUN
ITH
4
10
17
RITH
CITH
C10
(Opt)
1210
VOUT
1.2V / 1.8V / 3.3V @ 1.5A
C
E5
GND
13.0K
1%
220pF
E9
GND
CC
R4
115K
1%
R5
57.6K
1%
R6
25.5K
1%
JP1
1.2V
JP2
1.8V
JP3
3.3V
R7
(Opt)
22pF
(Opt)
R11
324K
1%
+
C7
(Opt)
1210
9
RT PGND PGND SGND
3
C4
47uF
6.3V
1210
R3
115K
1%
C5
10pF
RON
0 Ohm
8
E2
E4
VISHAY
JP6
VIN
4V - 15V
L1
2.2uH
IHLP-2020BZ-ER-2R2M01
JP4
USER SELECT
*
C2
3.3uF
35V
E3
GND
B
B
RUN
ON
1
2
2
3
OFF
ITH
FREQ
1
INTVcc
JP7
R8
1M
1
1MHz
EXT
2
3
JP8
2MHz
(Int.)
INTVcc
3
INT
JP9
CUSTOMER NOTICE
A
*
C2 IS AN OPTIONAL CAPACITOR. IT IS INSERTED
ON THE DC1454A TO DAMPEN THE (POSSIBLE)
RINGING VOLTAGE DUE TO THE LONG INPUT LEADS.
ON A NORMAL, TYPICAL PCB, WITH SHORT TRACES,
THE CAPACITOR IS NOT NEEDED.
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 SIGNIFICANTLYAFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
CONTRACT NO.
APPROVALS
PCB DES.
ENG. TOM GROSS
4
3
TITLE: SCHEMATIC
1.5A MONOLITHIC SYNCHRONOUS BUCK REGULATOR
SIZE
A
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
TECHNOLOGY
RB
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
DATE:
2
IC NO.
REV
LTC3601EMSE
DEMO CIRCUIT 1454A
Wednesday, October 21, 2009
1
SHEET
1
1 OF 1
A
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