DC1570A - Schematic

5
4
3
2
1
D
D
60V MAX TRANSIENT VOLTAGE
7.5V - 36V
R1
1.0
5%
GND
C2
4.7uF
50V
1206
R2
10k
JP1
E2
L1
7.8uH
U1*
LT3663EDCB-X.X
RUN
1
VIN
2
RUN
SW
8
BOOST
7
ISENSE
6
C3
0.1uF
16V
SD6030-7R8-R
D1
DFLS240
40V
2.0A
1
C1
4.7uF
50V
1206
2
E1
HVIN
SHDN
1
1
R3
71.5k
JP3
R4
147k
C
E3
VOUT
5
HVBUCK
C4
47uF
1206
10V
20%
3
0
ILIM
9
JP2
0
4
GND
CURRENT LIMIT SETTINGS
VOUTS
C
R5
75k
R6
20
5%
TP1
VOUT *
1.2A
GND
TP2
CURRENT LIMIT SETTINGS TABLE
B
JP2
0.6A
0
JP3
0
VERSION TABLE
0.8A
1.0A
1.2A
ASSY
0
1
1
0
1
1
-A
U1*
LT3663EDCB-3.3
VOUT *
3.3V
-B
LT3663EDCB-5.0
5.0V
Unless noted:
Resistors: Ohms
0402
1%
1/16W
Capacitors:
0402
10%
25V
A
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
CIRUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
B
CONTRACT NO.
APPROVALS
DRAWN:
4
3
TECHNOLOGY
J. Drew
CHECKED:
APPROVED:
ENGINEER:
J. Drew
DESIGNER:
TITLE:
SCHEMATIC
SIZE
DWG NO.
DATE:
2
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
LT3663EDCB - 3.3 / 5.0: 1.2A, 1MHz Step-Down Switching
Regulator with Output Current Limit
A
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
E4
REV
DC1570A-A/B
Thursday, September 03, 2009
SHEET
1
A
1
OF 1
A
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