DC725A - Schematic

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4
3
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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 customers 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.
ECO
REV
DESCRIPTION
DATE
PROD
3
APPROVED
02/28/06
D
D
VIN
L1 0.20uH
VISHAY IHLP-2525CZ-01 .20
VIN
SVIN
SVIN
C2
1uF
R5
OPT
470pF
RITH
5
CIN1 22uF
6.3V
JP7
CLKIN
2 PHASE
4 PHASE
VOUT
3 PHASE
1
4
3
6
TRACK
33
R1
VOUT
30.1K 1%
32
ITH
34
SVIN
ITHM
35
PVIN
36
PVIN
PVIN
28
5
PVIN
PVIN
27
6
SW
SW
26
7
SW
SW
25
8
SW
SW
24
9
SW
SW
23
PGOOD
22
MODE
11
CLKIN
BSEL
21
12
PHMODE
MGN
20
PHMODE
2
37
4
10
TP9
SVIN
29
13
B
VIN
FB
PGND
3
6
39pF
R6
OPT
47pF
CFF 22pF
JP1
1.2V
VIN
CIN3
22uF
6.3V
TP8
C
CC
100pF
OPT
RTR
100K
1%
JP2
1.5V
RFB1
29.4K
1%
JP3
1.8V
JP4
RFB2
20K
1%
RFB3
15K
1%
RFB4
OPT
USER
SELECT
RPG
100K
1%
TP10
PGOOD
SVIN
BSEL
1
10%
4
3
VOUT 15%
5%
5
1
2
3
4
B
MGN+
VOUT NO MGN
MGN-
6
5
JP8
5
SVIN
MGN
2
6
19
FORCED CONTINUOUS
4
C4
PLLPF
PGND
PULSE SKIP VOUT
MODE
1
5.10K
30
3
PGND
2
BURST
100pF
TRACK
18
C3
SVIN
N/C
SGND
PGND
SW
N/C
2
17
R3
16
5
JP6
31
PGND
6
C1
SVIN
1
15
-30%
U1
LTC3415EUHF
PVIN
38
3
CLKOUT
1
4
PGND
2
PGND
+30%
FREE RUN
RUN
PLLPF
GND
10K
1%
TP5
SVIN
COUT4
OPT
TP7
2
VIN
14
CLKOUT
COUT3
OPT
VOUT
1.2V/1.5V/1.8V
@ 7A
CITH
6.3V
C
COUT2
100uF
6.3V
1
CIN2
22uF
RSD
1M
1%
TP6
COUT1
100uF
6.3V
SVIN
2
1
OFF
R4
0
2
ON
TP2
VOUT
ENABLE
JP5
VOUT
SW
1
CINA
* 68uF
10V
GND
+
R2
10
2
CIN6
OPT
1
CIN5
100uF
6.3V
2
CIN4
100uF
6.3V
1
TP1
3
2.5V to 5.5V
JP10
TP12
SGND
JP9
TP13
GND
* CINA IS AN OPTIONAL CAPACITOR. IT IS INSERTED ON THE DC725A
A
TO DAMPEN THE (POSSIBLE) RINGING VOLTAGE DUE TO
THE USE OF LONG INPUT LEADS. ON A NORMAL TYPICAL
PCB WITH SHORT TRACES. CINA IS NOT NEEDED.
UNLESS OTHERWISE SPECIFIED
DIMENSIONS ARE IN INCHES
TOLERANCE ON ANGLE - - 2 PLACES - - - 3 PLACES - - INTERPRET DIM AND TOL
PER ASME Y14.5M -1994
THIRD ANGLE PROJECTION
CONTRACT NO.
APPROVALS
DRAWN MEI
DATE
12/01/04
CHECKED
TECHNOLOGY
TITLE
APPROVED
ENGINEER
DESIGNER
SIZE
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
A
SCH, LTC3415EUHF, 7A MONOLITHIC SYNCHRONOUS
BUCK CONVERTER
CAGE CODE
DWG NO
REV
3
DC725A
DO NOT SCALE DRAWING
5
4
3
Thursday, March 30, 2006
SCALE: NONE
2
FILENAME: 725A-3.DSN
SHEET
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