DC1787A - Schematic

5
4
3
2
1
REVISION HISTORY
ECO
REV
_
1
DESCRIPTION
APPROVED
DATE
PRODUCTION
ZHONGMING Y.
09-30-11
D
D
L1A
15uH
+VOUT
R2
100k
E3
PGOOD
R3
255k
C3
4.7uF 16V
9
0805
3
1
4
C5
68nF
C6
0.1uF
B
C7
470pF
R4
1.43k
R5
27.4k
VIN
2
DRIVE
10
1
NOTES: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE IN OHMS, 0603.
ALL CAPACITORS ARE IN MICROFARADS, 0603.
2. INSTALL SHUNTS AS SHOWN.
5
C2
1uF
50V
0805
EN/UVLO
VIN > 4V
INTVCC
GATE
SS
VC
SENSE
RT
8
OPT
Q1
RJK0652DPB
4
7
RCS
0.005
2010
E7
SYNC
SYNC
3
ON
2
1
OFF
JP2
APPROVALS
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES.
KIM T.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APP ENG. ZHONGMING Y.
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.
4
1A
D1
1N4148WT
2
CUSTOMER NOTICE
A
VIN > 2.8V
5
12
0.5A
1
2
3
1
2
3
11
R6
0
FBX
R1
249k
+VOUT
12V /
C
SYNC
SHDN
E6
*
*
5
RUN
+VOUT
+VOUT
6
EN/UVLO
JP1
D3
PDS360
1
COUT2
47uF
16V
1210
RFBB
15.8k
U1
LT3759EMSE
E4
3
2
COUT1
47uF
16V
1210
1210
C
EN/UVLO
C1
4.7uF
50V
RFBS
102k
GND
L1B
15uH
2
SUN ELECT
50CE22BS
E2
CIN2
10uF
50V
1210
E5
4
3
22uF
50V
CIN1
10uF
50V
1210
1
+ CIN3
PGOOD
PGOOD
VIN
GND
GND
E1
13
VIN
2.8V - 36V
DRQ127-150-R
3
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
SEPIC CONVERTER WITH WIDE INPUT VOLTAGE RANGE
SIZE
N/A
SCALE = NONE
B
DATE:
2
IC NO.
LT3759EMSE
DEMO CIRCUIT 1787A
REV.
2
09/30/2011, 12:52 PM
SHEET 1
1
OF 1
A
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