DC1435A - Schematic

A
B
C
D
E
REVISION HISTORY
ECO
REV
DESCRIPTION
APPROVED
DATE
2
PRODUCTION
TOM G.
06-03-10
__
RTR1
CSS1
VIN
SVIN
RSS1
1
2
TRACK
3
4
EXT SS
5
6
INT SS
ICMP
RUN1
J1
4.7M
0.01uF
SVIN
COMP1
JITH1
ECMP
2
3
4
CFFW1
VIN
1
RPG1
100k
TP3
20
SW1
19
Ith1
CIN1
22uF
6.3V
1206
RITH1
43.2k
1%
C1
10pF
CFILT
1uF
RFILT
24
3
ON
2
SVin
9
PGOOD2
TP10
PVin1
23
SW2
16
PGood2
13
100k
7
15
1
4.7M
Track/SS2
INT SS 1
4
RTR2
TRACK
5
6
100k
TRACK1 7
8
TRACK2
TP9
RM4
100k
1%
ECBM
JP4
USER SELECT
Rt/Sync
VOUT2
VOUT2
3A
11
SW2
12
Ith2
6
0.47uH
VISHAY
IHLP2020BZERR47M11
COUT2
47uF
6.3V
1210
COUT4
10uF
6.3V
0805
COUT8
100uF
6.3V
OPT
3
TP6
+
COUT6
100uF
OPT
GND
FB2
5
25
8
17
3
10pF
CFFW2
ECMP
3
4
ICMP
1
2
TP7
R2
COMP2
C2
2
EXT SS 3
3
3.3V
JITH2
4
1
0.01uF
EBMCV
J9
1
JP3
R9
Run2
J4
TRACK / SS2
RSS2
RM3
301k
1%
2.5V
R7
2
GND
TP15
JP2
267k
1%
CITH1
220pF
VIN
CSS2
R1
845k 1%
L2
PVin2
PVin2
4
TP5
OPT
10
RPG2
FB1
COUT5
100uF
OPT
1.8V
R5
PVin1
22
PGND
CIN2
22uF
6.3V
1206
SGND
CIN3
22uF
6.3V
1206
SRLim
CIN4
22uF
6.3V
1206
Mode
CIN5
100uF +
OPT
+
10pF
187k
1%
Phase
+
TP2
OFF
PGood1
SW1
VIN
GND
RUN2
J2
Run1
21
TP1
CIN6
100uF
3
Track/SS1
14
18
PGOOD1
VIN
2.25V - 5.5V
24
JP1
R3
422k
1%
LTC3615EUF
2
ON
COUT7
100uF
6.3V
OPT
GND
1
3
U1
OFF
COUT3
10uF
6.3V
0805
COUT1
47uF
6.3V
1210
TP4
2
RTR3
OPT
4
VOUT1
3A
0.47uH
VISHAY
IHLP2020BZERR47M11
J3
TRACK / SS1
SET
100k
EXT
TP11
VOUT1
L1
TRACK1
RT
200k
1%
SVIN
10pF
RITH2
43.2k
1%
348k 1%
GND
TP14
CITH2
220pF
RTR4
OPT
J6
RT / SYNC
INT SYNC
RT2
OPT
2
1
2
RT 3
4
EXT SYNC 5
TRACKING
6
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%
1
2
3
4
5
6
RM2
1.13M
1%
1
TP13
(BURST MODE
EXTERNAL CLAMP
VOLTAGE)
2
3
4
ADJ
5
6
MAX
7
8
2
JP6
R6
1.5V
232k
1%
RSRLIM
100k
1%
JP7
R8
1.8V
174k
1%
JP8
R10
OPT
1
2
PSM
3
4
FCM
5
6 ECBM
7
8 ICBM
ECBM
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE IN OHMS, 0603.
ALL CAPACITORS ARE IN MICROFARADS, 0603.
(PULSE-SKIP MODE)
(FORCED
CONTINUOUS MODE)
(EXTERNAL CLAMP
BURST MODE)
(INTERNAL CLAMP
BURST MODE)
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
1.2V
348k
1%
USER
SELECT
J7
MODE
ECBM
BMECV
SVIN
MIN
SYNC
TP8
1
JP5
R4
J8
SRLIM
B
C
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.
REV.
LTC3615EUF
2
DEMO CIRCUIT 1435A
Thursday, June 03, 2010
SHEET 1
E
OF 1
1
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