DC927A - Schematic

5
4
3
2
ECO
VIN
R13 0
VIN+
GND
GND
C39
1uF
J6
+ C2
220uF
4V
L2
0.01
3.3uH
RUN/SS2
15
SWB
PG2
14
PG2
6
G2
VC2
13
VC2
SW2
Q2
Si7848DP
JP2
C35
C36
[1]
R37 0
4
SW2
3
1
20
21
19
FB1
SENSE1-
22
NC
BIAS
5
3.3V
2
C37
1000pF
680pF
R33
47K
R34
51K
1%
3.3V RUN/SS
RUN
SHDN
TP9
PG2
D2
PDS1040
1
2
B
J5
R2
4
SHDN
C
3
2
1
3.3V
16
7
C34
6.8uF
50V
TP7
3.3VOUT
[email protected]
VIN
RUN/SS1
C33
1000pF
3
3.3VOUT
R10
130K
1%
8
7
6
5
348K
1%
G2
UVLO
3
5V RUN/SS
RUN
2
3
22uH
VIN
PG1
C32
1
L3
VC1
17
GND
VIN
R30
18
VIN
JP1
680pF
25
C4 2.2uF
VC1
G1
2
R31
51K
1%
C31
[1]
LT3742EUF
PG1
1
FB2
TP3
VIN
SENSE2-
G1
D1
PDS1040
SENSE1+
4.7uH
12
1uF
0.01
11
J4
+ C1
150uF
6.3V
SW1
SENSE2+
C38
L1
10
J3
R1
U1
23
5V
R35 0
4
24
C30
6.8uF
50V
NC
TP2
NC
GND
R32
47K
Q1
Si7848DP
9
GND
5V
TP8
SW1
VIN
1
2
C
APPROVED
PG1
TP5
5VOUT
[email protected]
06/08/06
[1]
NC
5VOUT
DATE
PROTO
R17
200
1%
C11
R15 0
8
7
6
5
GND
+ CIN
47uF
35V
J2
3
2
1
GND
J1
3
5.5V - 28V
DESCRIPTION
3
D
1.05K 1%
8
VIN+
REV
R3
D
TP4
1
REVISION HISTORY
This circuit is proprietary to Linear Technology and supplied
for use with Linear Technology parts.
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
Applications Engineering for assistance.
B
R16 0
TP6
C12
R14 0
[1]
R4
619
A
1%
R18
200
1%
UNLESS OTHERWISE SPECIFIED
DIMENSIONS ARE IN INCHES
TOLERANCE ON ANGLE - - 2 PLACES - - - 3 PLACES - - INTERPRET DIM AND TOL
PER ASME Y14.5M -1994
NOTES: UNLESS OTHERWISE SPECIFIED,
THIRD ANGLE PROJECTION
[1] OPTIONAL.
CONTRACT NO.
APPROVALS
DRAWN
MEI
DATE
05/12/05
CHECKED
TECHNOLOGY
TITLE
A
SCH, LT3742EUF, DUAL 2-PHASE STEP-DOWN
SWITCHING CONTROLLER
APPROVED
2. ALL RESISTORS AND CAPS SHALL BE 0402.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
ENGINEER
SIZE
DESIGNER
CAGE CODE
DWG NO
REV
3
DC927A
DO NOT SCALE DRAWING
5
4
3
Thursday, November 08, 2007
2
SCALE: NONE
FILENAME: 927A-3.DSN
SHEET
1
1
OF
1
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