DC1293A - Schematic

1
1
R3 *
(OPT) RUN
JP1
2
SHDN
TP3
3
PG
1
4 PG
TP2
LT1939EDD
2 SHDN
R4
40.2K
LDRV 10
A
L1
IHLP-2525CZ-ER-6R8
VOUT1
6.8uH
D1
B240A
COUT1
47uF
10V
R10
8.06K
1%
R13 OPT
TP5
R14
0
R15
1K
COUT2
22uF
10V
R7
24.9K
1%
OPT
VIN
GND
TP6
C7
OPT
TP7
VOUT2
[email protected]
GND
R8
8.06K
1%
R11
100K
PG
[email protected]
Q1
ZXTCM322
R16
TP9
VOUT1
C4
OPT
VOUT2
SYNC
TP4
R9
42.2K
1%
C5
OPT
LFB 9
13 GND
(800kHz)
PG
6 RT/SYNC
R5
53.6K
1%
D3
BAT54XV2T1
D2
OPT
C1
0.22uF
7
C2
330pF
SW 12
FB 8
3 SS
5 VC
C6
OPT
C3
0.47uF
16V
2
U1
2
R2
100K
1
R1*
(OPT)
CIN2
1uF
2
GND
1
OPT
CIN1
22uF
50V
A
R12
BST 11
7V - 25V
TP1
D4 OPT
2
1
VIN
VIN 1
VIN
2
TP8
B
B
* DO NOT STUFF R1 WITHOUT R3, SEE QSG FOR DETAILS.
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.
1
CONTRACT NO.
APPROVALS
DRAWN
DATE
HELEN
10/18/07
Tiger Zhou
10/18/07
CHECKED
APPROVED
ENGINEER
DESIGNER
Monday, November 05, 2007
TECHNOLOGY
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
TITLE
LT1939EDD
Monolithic Step-Down Switching Regulator with LDO
SIZE
CAGE CODE
SCALE:
FILENAME:
2
DWG NO
REV
A
DC1293A
SHEET
1
OF
1
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