DC2346A - Schematic

5
D
VEMI+ E2
6V ‐ 24V
Transients to 42V
4
VEMI
C39
0.1µF
50V
0402
E4
3
FB1
330 Ohm
MPZ2012S331AT000
L5
0.22µH
IHLP‐1212BZ‐ER‐R22M11
VISHAY
C29
10µF
50V
X5R
1206
C30
10µF
50V
X5R
1206
TP1
+
GND
CPVIN2
10µF
50V
X7R
1210
C6
22µF
50V
D
INTVCC
28
C1
4.7uF
10V
X5R
0603
VIN
TP2
CPVIN1
4.7µF
50V
X7R
1206
CVIN
1µF
50V
X7R
0805
C36
0.1µF
50V
0402
23
37
14
C37
0.1µF
50V
0402
INTVCC
BST1
VIN
SW1
ON
EN/UVLO
1
2
1%
3
OFF
VIN
FB2
C
22
VOUT1
R6
19.1k
1%
E9
VOUT2
R7
19.1k
1%
SW2
SW2
PVIN3
CPVIN3
4.7µF
10V
X7R
0805
R10
100k
1%
JP1
17
3
EN/UVLO
SW3
R8
19.1k
1%
E11
PG2
FB3
PG1
1
PG2
11
PG3
12
L1
3.3µH
XAL5030‐332MEC
Coilcraft
R1
806k
1%
C3
4.7pF
R2
5
6
7
L2
1.5µH
XFL5015‐152MEC
Coilcraft
*
C4
47µF
10V
X5R
1206
200k
1%
C11
0.1µF
10V
0402
E1
VOUT1
5V / C5
0.IµF
50V E3
0603
GND
VOUT1
26
EXT
PVIN3
VOUT2
R3
464k
1%
VOUT2
JP6
C15
47µF
10V
X5R
1206
C14
12pF
C35
47µF
10V
X5R
1206
R5
25
L3
15
1.0µH
NPIS42LS1R0YTRF
NIC Comp. Corp.
VOUT3
PG1
C2
0.1µF
10V
0402
PVIN2
FB1
PVIN3
4
PVIN1
BST2
R4
340k
1
U1
LT8601EUJ#PBF
VEMI‐
VIN
2
*
200k
1%
VOUT3
R11
187k
1%
E5
VOUT2
3.3V / C16
0.IµF
50V E6
0603
GND
E7
C18
47µF
10V
X5R
1206
C17
22pF
C
VOUT3
1.8V / *
C19
0.IµF
50V E8
0603
GND
R12
24
150k
1%
PG1
PG2
PG3
E12
32
ON
B
1
18
3
29
JP4
E21
R18
28.7k
1%
C33
TRKSS2
TRKSS2
1
47nF
X7R
19
36
SYNC
INTVCC
SYNC
1
PULSE SKIP
2
BIAS
TRKSS1
TRKSS2
RUN3
CPOR
3
BURST
31
JP7
C27
220pF
R15
100k
1%
RT
N/C
N/C
POREN
2
8
9
13
ON
21
20
47nF
X7R
2
OFF
10
E16
33
B
E18
39
POREN
R19
100k
1%
38
40
41
TRKSS1
SYNC
GND
GND
GND
GND
GND
(Opt)
C32
E20
TRKSS1
RST
16
27
30
34
35
C31
VOUT2
GND
GND
GND
GND
E15
GND
GND
GND
PG3
RST
2
3
OFF
NOTE: UNLESS OTHERWISE SPECIFIED.
JP5
E17
1. All Resistors 0603.
2. All Capacitors 0603.
See Demo Manual for details
on VOUT current capability.
R21
RUN3
RUN3
EXT
*
100k
1%
1
2
3
RUN
A
CUSTOMER NOTICE
PG2
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
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
APP ENG.
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
JP2
TECHNOLOGY
5
4
3
A
LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY
TITLE: SCHEMATIC
42V Triple Monolithic Synchronous Step-Down Regulator
SIZE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
1630 McCarthy Blvd.
Milpitas, CA 95035 www.linear.com
Phone: (408)432-1900
Fax: (408)434-0507
N/A
SCALE = NONE
2
IC NO.
LT8601EUJ
DEMO CIRCUIT 2346A
MODIFY DATE: Mar 01, 2016
2346A_REV2
1
SHEET
REV.
2
1
OF
1
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