DC1768A - Schematic

5
4
3
2
1
REVISION HISTORY
E7
R10
1
TRACK
0 Ohm
TRACK
3
R9
OPT
C9
2200pF
PGOOD
E6
2
INTVCC
E1
ECO
REV
-
2
DESCRIPTION
APPROVED
DATE
TOM G.
07-06-12
PRODUCTION
4
R1
SS
(SOFT-START)
JP5
INTVCC
100K
D
D
C1
D1
CMDSH-3TR
OPT
INTVCC
MODE/SYNC
BURST MODE
SYNC
E8
SYNC
(FORCED CONTINUOUS MODE) FCM
1
2
3
4
5
6
2.2uF
16V
0603
U1
9
LTC3626EUDC
JP6
17
VIN
4V - 20V
E2
+
E3
C6
22uF
25V
1210
C14
OPT
1812
*
C2
3.3uF
35V
6032
15
16
14
C3
22uF
25V
1210
13
R17
10
5
4
C15
0.33uF
0603
JP7
2
1
INTVCC
BOOST
MODESYNC
SW
SW
PVIN
PVIN
SVIN
VON
19
20
3
C8
0.1uF
25V
0603
L1
1uH
IHLP-2020BZ-ER-1R0M01
RON
E4
RUN
TMON
ITH
TSET
IOUT
IIN
7
RT
12
R3
115K
1%
C5
22pF
11
8
RITH
CITH
13K
220pF
1
RUN
E5
GND
C
R4
115K
1%
R5
57.6K
1%
R6
25.5K
1%
JP1
1.2V
JP2
1.8V
JP3
3.3V
R7
OPT
OPT
ITH
R8
1
1M
EXT
2
TMON
3
INTVCC
R2
324K
1%
E10
INT
R12
1
C11
1uF
ON
1
3
OFF
INTVCC
INTVCC
B
IOUT
1
INTVCC
3
JP8
ON
2
1MHz
2
JP11
C12
1uF
0603
4.02k
FREQ
2
JP4
USER SELECT
JP9
TMON
(TEMPERATURE MONITOR)
VOUT
1.2V/1.8V/3.3V @ 2.5A
GND
CC
21
2
OFF
C10
OPT
1206
E9
3
ON
C7
OPT
1206
10
SGND PGND
6
C4
47uF
6.3V
1206
VISHAY
0 Ohm
FB
GND
C
18
TRACKSS PGOOD
3
OFF
JP12
2MHz
(Int.)
E11
E12
E13
TSET
IIN
(TEMPERATURE SET)
R11
IIN
3
2
1
INTVCC
TSET
EXT SET
INTVCC
1M
3
OFF
2
R14
OPT
JP10
ON
1
SET/OFF
C13
1uF
0603
*
A
B
IOUT
C2 IS AN OPTIONAL CAPACITOR. IT IS INSERTED
ON THE DC1768A 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.
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE IN 0402.
ALL CAPACITORS ARE IN 0402.
R13
4.02k
JP13
CUSTOMER NOTICE
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.
5
4
3
APPROVALS
PCB DES.
JW
APP ENG.
TOM G.
TECHNOLOGY
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: SCHEMATIC
2.5A SYNCHRONOUS BUCK REGULATOR
WITH MONITORING
SIZE
N/A
SCALE = NONE
2
IC NO.
REV.
LTC3626EUDC
DEMO CIRCUIT 1768A
DATE: Wednesday, July 25, 2012
2
SHEET
1
1
OF
1
A
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