DC1973A - Schematic

5
4
3
2
1
REVISION HISTORY
DESCRIPTION
APPROVED
ECO REV
4
PRODUCTION
DATE
WALKER B.
5-10-13
VSYS
L2
C17
0.1µF
50V
5
R1
1M
6
GND
R2
INTVCC
4
OPT
1
R22
100k
23
E4
SYNC
24
E6
INTVCC
GND
17
E8
C
R6
2
100k
3
RCBL
R7
12.4k
0603
E10
C6
1µF
25V
0603
C5
0.1µF
8
BST
EN/UV
SW
SYNC
SW
RCBL
SW
ICTRL
ISP
INTVCC
ISN
TR/SS
SYS
RT
PG
PGND
USB5V
VSYS
5.xV / 0.1A
D
GND
16
C3
0.22µF
16V
0603 L1
VIN
13
3.3µH
C4
XAL5030-332MEC 47µF
10V
1210
14
15
VOUT
R11
C25
47µF
10V
1210
R3
0
1206
R4
VCABLE
E15
0.3 2W
0830
C-GND
GND
R13
E18
OPT 1206 E17
0.02
1206
C9
OPT
10V
1206
VCABLE
E16
C11
1µF
25V
0805
E3
E5
21
22
18
C13
R8
19
49.9k
C12
1µF
25V
0805
1nF
R9
20
E7
VCABLE
5V / 2.1A
C_GND
VOUT
5.xV / 2.1A
C
E9
GND
10k
PG
PGND
E11
R14
OPT
X4
OPEN SET
3
1
VCABLE
2
9
10
N/C
ICTRL
7
R10
16.5k
(2MHz)
0603
VIN
N/C
C2
4.7µF
50V
1206
N/C
E2
+
12
C8
4.7µF
50V
1206
C7
4.7uF
50V
1206
C16
0.1µF
50V
C10 E13
0.1µF
25V
0603
E12
U1
LT8697EUDD
GND
C15
0.1µF
50V
C1
22µF
63V
SUNCON
63CE22BS
11
4.7µH
N/C
VIN
6V - 42V
FB1
25
D
VIN
E1
VCABLE
3
VSYS
R5
18
2512
X5
V+
R16
43.2k
0603
R15
75k
0603
1
B
R23
18
2512
2
1. ALL RESISTORS ARE 0402.
ALL CAPACITORS ARE 0402.
DIV
5
2
C14
2.2nF
0603
R21
2
1206
R24
2
1206
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.
5
4
OPEN
Q1
ZXMN3A14F
1
CUSTOMER NOTICE
A
3
3
R19
10k
0603
J3
DATA+
3
R18
49.9k
0603
R17
49.9k
0603
3
1
JW
APP ENG.
WALKER B.
DATA-
OPEN DX2
1630 McCarthy Blvd.
Milpitas, CA 95035 www.linear.com
Phone: (408)432-1900
Fax: (408)434-0507
TECHNOLOGY
TITLE: SCHEMATIC
USB 5V 2.5A OUTPUT, 42V INPUT
SYNCHRONOUS BUCK WITH CABLE DROP COMPENSATION
N/A
2
A
LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY
SIZE
SCALE = NONE
B
1
2
3
4
USB
X3
APPROVALS
PCB DES.
1
2
3
4
2
SHORT
2
OUT
4
SET
2
1
3
GND
NOTES: UNLESS OTHERWISE SPECIFIED
V+
R20
2M
0603
U2
LTC6900CS5
X1
OPEN D+
3
1
1
OPEN
2
IC NO.
REV.
LT8697EUDD
DEMO CIRCUIT 1973A
MODIFY DATE: Friday, May 17, 2013
4
SHEET 1
1
OF 1
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