DC1292A - Schematic

5
4
3
2
1
E1
INTVCC
R8
10k
C7
OPT
R9
OPT
R11
0
R7
0
3
4
6
INTVCC
ION 7
DCM
CCM
3
2
1
COUT2
100uF +
6.3V
1206
COUT3
330uF
2.5V
SANYO
2R5TPE330M9
7343
Q4
OPT
+
VOUT
[email protected]
COUT4
330uF
2.5V
C
SANYO
2R5TPE330M9
7343
J4
GND
R10
499k VIN
C6
4.7uF
16V
0805
4
E4
VOUT-
ONLY APPLY LOAD FROM J3 TO J4
B
FSW = 340kHz, TYPICAL
R12
10k
MODE
CUSTOMER NOTICE
NOTE: UNLESS OTHERWISE SPECIFIED
A
1
2
3
Q3
RJK0330DPB
4
C8
OPT
B
JP2
1
2
3
BG 12
FCB
SGND
D1
CMDSH-3
INTVCC
INTVCC 11
VRNG
COUT1
100uF
6.3V
1206
VOUT+
J3
VOUT
2
PULSE
PA0515.471NLT
C4
0.1uF
16V
VFB
PGND
INTVCC
8
1
R13
0
VIN-
E3
5
BOOST 16
R6
20K
5
5
C5
390pF
J2
GND
L1
0.47uH
SW 14
ITH
D
SANYO
16SVP180MX
E2
16V
5
5
CIN3
180uF
16V
4
1
2
3
R5
13k
VIN 10
TG 15
C3
68pF
C
RUN/SS
C1
1uF
1
1
RUN
4
R4
2.2
Q2
OPT
CIN4 +
10uF
16V
1210
VIN
4.5V - 14V
13
OFF
C2
0.1uF
Q1
RJK0305DPB
CIN2
1210
OPT
2
1
2
3
ON
PGOOD 2
JP1
NC 9
U1
LTC3878EGN
E7
RUN/SS
CIN1
10uF
16V
1210
R1
100k
E6
PGOOD
VIN
1
2
3
D
VIN+
J1
1. ALL RESISTORS ARE IN OHMS, 0603.
ALL CAPACITORS ARE IN MICROFARADS, 0603.
CONTRACT NO.
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
DRAWN:
CHECKED:
APPROVED:
ENGINEER: MIKE S.
DESIGNER:
TECHNOLOGY
KIM T.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: SCHEMATIC
A
NO RSENSE
SIZE
A
DATE:
DWG NO.
TM
STEP-DOWN DC-DC CONVERTER
DC1292A-1 * LTC3878EGN
Wednesday, January 07, 2009
2
SHEET
1
REV
A-1
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