DC1442A - Schematic

5
4
RPG
100K
FC (FORCED CONTINUOUS)
BM (BURST MODE)
SYNC
PS (PULSE-SKIP)
EXT SS
INT SS
TRACK
2
17
Track/SS
SW
16
Ith
Vfb
8
D1
Opt.
E8
RSET
105K
JP1
2.5V
RTR1
255K
RFB5
845K
1%
JP3
5V
RFB2
187K
1%
C
COUT1
0.1uF
GND
GND
E5
JP4
Opt.
RFB3
115K
1%
B
RFB4
Opt.
RTR2
200K
Customer Notice
* Capacitor CIN1 Is An Optional Capacitor.
It Is Inserted On The DC1442A To Dampen
The (Possible) Ringing Voltage Due To The
Long Input Leads. On A Normal, Typical
PCB, With Short Trace, The Capacitor Is
Not Needed.
5
CFFW
10pF
JP2
3.3V
RFB1
267K
1%
LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY
A
COUT
100uF
6.3V
E4
B
TRACK
VOUT
2.5A Max
E3
2
SW
2
18
RUN
L1
3.3uH
Vishay
IHLP-2525CZ-01
1
2
4
6
SW
Sync/Mode
CBST
0.22uF
1
1
3
5
SW
19
RC
4.32K
CC
1000pF
JP7
TRACK
20
1
CC1
Opt.
Boost
DBST
CMDSH-3
2
7
3
1
11
INTVcc
CST
1uF
2
PVin
10
RSD
4.7M
CSS
0.1uF
2
4
JP5
VOUT ENABLE
1
ON
2
OFF
3
C
PVin
PGnd
PGnd
PGnd
PGnd
SGnd
PGnd
E2
1
PGood
5
U1
LTC3603EUF
12
13
14
15
9
21
CIN
22uF
25V
CIN2
0.1uF
16V
Opt.
Rt
GND
*
CIN1
3.3uF
35V
6
E1
PGOOD
E7
E6
VIN
4V - 15V
D
1
JP6
MODE/SYNC
1
2
3
4
5
6
7
8
1
SYNC
1
RBM1
845K
CBM
0.1uF
10V
Opt.
D
2
2
RBM2
137K
3
4
LINEAR TECHNOLOGY CORPORATION
1630 McCARTHY BLVD.
MILPITAS, CA. 95035
408-432-1900
408-434-0507 FAX
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.
Size
Document Number
This Circuit Is Proprietary To Linear Technology And
Supplied For Use With Linear Technology Parts.
Date:
Wednesday, February 04, 2009
3
www.linear.com
A
LTC3603EUF
Title
High Input Voltage 2.5A Monolithic Synchronous Buck Regulator
2
Rev
A
Demo Circuit 1442A
Sheet
1
1
of
1
Similar pages