DC1572A - Schematic

A
B
C
D
E
REVISION HISTORY
ECO
REV
__
RTR1
TRACK
3
4
EXT SS
6
INT SS
U1
VIN
1
RPG1
100k
PGOOD1
TP3
3
4
CFFW1
R3
21
Track/SS1
11
Run1
15
PGood1
17
SW1
16
Ith1
RITH1
43.2k
1%
C1
10pF
R5
CITH1
220pF
22
PVin1
6
PVin2
7
GND
20
TP2
PGOOD2
TP10
VIN
RPG2
3
100k
12
2
CSS2
1
INT SS
1
2
EXT SS 3
4
RTR2
TRACK
5
6
100k
TRACK1 7
8
4.7M
TRACK2
TP9
Rt/Sync
J4
TRACK / SS2
RSS2
0.01uF
Track/SS2
1
OFF
PGood2
Run2
R1
845k 1%
R9
GND
TP12
JP2
RM3
301k
1%
2.5V
EBMCV
J9
1
JP3
3.3V
RM4
100k
1%
JP4
3
ECBM
USER SELECT
VOUT2
L2
SW2
9
SW2
8
Ith2
3
SVin
10
23
TP5
OPT
PVin2
13
4
FB1
PGND
CFILT
1uF
4
1.8V
267k
1%
R7
PVin1
19
SGND
RFILT
24
COUT5
100uF
OPT
FB2
VOUT2
3A
0.47uH
VISHAY
IHLP2020BZERR47M01
COMP2
JITH2
2
COUT2
47uF
6.3V
1210
SVIN
ICMP
1
2
ECMP
3
4
COUT4
10uF
6.3V
0805
10pF
CFFW2
COUT8
100uF
6.3V
OPT
3
TP6
+
COUT6
100uF
OPT
GND
TP7
R2
25
CIN1
22uF
6.3V
1206
5
CIN2
22uF
6.3V
1206
SRLim
CIN3
22uF
6.3V
1206
Mode
CIN4
22uF
6.3V
1206
14
CIN5
100uF +
OPT
Phase
+
+
10pF
187k
1%
24
18
ON
SW1
JP1
422k
1%
VIN
7343
RUN2
J2
2
LTC3615EFE
2
ON
3
1
3
ECMP
COUT7
100uF
6.3V
OPT
GND
JITH1
4.7M
0.01uF
SVIN
COMP1
COUT3
10uF
6.3V
0805
COUT1
47uF
6.3V
1210
TP4
2
2
5
VIN
SVIN
RSS1
1
ICMP
TP1
CIN6
100uF
03-19-10
SET
CSS1
VIN
2.25V - 5.5V
DATE
TOM G.
VOUT1
3A
0.47uH
VISHAY
IHLP2020BZERR47M01
J3
TRACK / SS1
RTR3
OPT
OFF
APPROVED
VOUT1
EXT
100k
4
RUN1
J1
PRODUCTION
L1
TRACK1
TP11
DESCRIPTION
2
RT
178k
1%
C2
10pF
348k 1%
RITH2
43.2k
1%
GND
TP14
CITH2
220pF
RTR4
OPT
J6
RT / SYNC
INT SYNC
RT2
2
OPT
1
2
RT 3
4
EXT SYNC 5
6
2
TP8
J5
PHASE
RTR5
VOUT1
316k
1%
RTR6
105k
1%
180 deg OUT PH
(OUT-OF-PHASE)
90 deg OUT PH
(OUT-OF-PHASE)
IN PHASE
RM1
866K
1%
RM2
1.13M
1%
TP13
(BURST MODE
EXTERNAL CLAMP
VOLTAGE)
1
2
3
4
5
6
SVIN
TRACKING
1
2
MIN
3
4
ADJ
5
6
MAX
7
8
ECBM
R6
2
PSM
3
4
FCM
5
6 ECBM
7
8 ICBM
(PULSE-SKIP MODE)
(FORCED
CONTINUOUS MODE)
(EXTERNAL CLAMP
BURST MODE)
(INTERNAL CLAMP
BURST MODE)
B
1.5V
R8
JP7
1.8V
174k
1%
JP8
OPT
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.
A
JP6
232k
1%
R10
1
1.2V
348k
1%
RSRLIM
100k
1%
J7
MODE
ECBM
BMECV
1
R4
J8
SRLIM
SYNC
JP5
C
USER
SELECT
APPROVALS
PCB DES.
A.K.
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
DUAL 3A MONOLITHIC SYNCHRONOUS STEP-DOWN REGULATOR
SIZE
N/A
SCALE = NONE
D
DATE:
IC NO.
LTC3615EFE
REV.
2
DEMO CIRCUIT 1572A
Friday, April 30, 2010
SHEET 1
E
OF 1
1
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