DC1750A - Schematic

5
4
3
2
1
REVISION HISTORY
ISP
ECO
REV
_
2
DESCRIPTION
APPROVED
DATE
PRODUCTION
WALKER B.
03-26-12
ISN
D
R1
5
R12
1M
R4
E5
4
OPT
SYNC
3
2
1
SYNC
E9
C
GND
GND
6
1
23
JP1
24
17
2
E6
IMON
3
E7
C7
1uF
0603
25V
FB1
L2
4.7uH
VEMI
C3
4.7uF
50V
1206
R8
60.4k
7
8
EN/UV
SW
SYNC
SW
IMON
SW
ICTRL
ISP
INTVCC
ISN
TR/SS
BIAS
RT
PG
PGND
FB
C4
0.22uF
16V
0603
13
VIN
R5
0.02
1206
14
ISP
R6
15
21
C5
OPT
ISN
VOUT
E3
VOUT
3.3V / 2.5A
C6
47uF
10V
1210 E4
GND
0
C
R7
22
0
18
R9
19
R10
20
R11
412k
49.9k
1Meg
C9
4.7pF
B
E10
PG
C10
4.7uF
50V
1206
NOTES: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE IN OHMS, 0402.
ALL CAPACITORS ARE IN MICROFARADS, 0402.
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.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APP ENG.
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
TECHNOLOGY
JW
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
4
3
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
WALKER B. TITLE: SCHEMATIC
IC NO.
DATE:
REV.
LT8611EUDD
N/A
SCALE = NONE
A
42V, 2.5A MICROPOWER SYNCHRONOUS STEP-DOWN
REGULATOR WITH CURRENT SENSE
SIZE
5
L1
4.7uH
PGND
CUSTOMER NOTICE
A
16
VIN
9
B
C8
0.1uF
BST
N/C
ICTRL
VIN
N/C
GND
C2
4.7uF
50V
1206
N/C
E2
0
1206
12
22uF
63V
SUNCON
63CE22BS
11
+ C1
U1
LT8611EUDD
GND
VIN
25
VIN E1
3.8V - 42V
N/C
D
R3
OPT
10
R2
OPT
2
DEMO CIRCUIT 1750A
Tuesday, April 10, 2012
SHEET 1
2
1
OF 1
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