DC1949A - Schematic

5
D
**
VEMI+
5.5V - 42V
4
E2
FB1
L5
330 Ohm
0.22µH
MPZ2012S331AT000 IHLP1212BZERR22M11
VEMI
C39
0.1µF
50V
0402
E4
3
C29
10µF
50V
X5R
1206
INTVcc 28
VEMI-
TP1
C1
4.7µF
10V
X7R
0805
VIN
+
TP2
CPVIN2
10µF
50V
X7R
1210
C6
22µF
50V
GND
CPVIN1
4.7µF
50V
X7R
1206
CVIN
1µF
50V
X7R
0805
C36
0.1µF
50V
0402
23
37
14
C37
0.1µF
50V
0402
D
INTVCC
BST1
VIN
SW1
FB1
R23
0 Ohm
22
PG1
PG2
11
PG3
40
12
E12
PG3
32
C31
E15
RST
21
20
TRKSS1
TRKSS1
B
1
ON
30
47nF
X7R
18
2
JP4
E21
29
3
OFF
C34
(Opt)
C33
TRKSS2
TRKSS2
1
47nF
X7R
(2MHz)
19
RUN3
CPOR
POREN
N/C
1
R13
75.0k
1%
C20
27pF
24
R14
33
150k
1%
E10
VOUT4
1.2V / 1A
C22
0.IµF
50V E14
0603
GND
*
E16
SYNC
R25
0 Ohm
(Opt)
31
B
E18
39
POREN
R19
100k
1%
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
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
PG2
TECHNOLOGY
TITLE: SCHEMATIC
SIZE
JP3
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
C21
47µF
10V
X5R
1206
*
**
2
RUN
VOUT4
C
*
1. All Resistors 0603.
2. All Capacitors 0603.
See Demo Manual for details on VOUT current capability.
See Demo Manual for operation details.
100k
1%
RUN4
3
1.0µH
NPIS42LS1R0YTRF
NIC Comp. Corp.
150k
1%
RT
R22
RUN4
EXT
C17
27pF
E7
VOUT3
1.8V / 1A
C19
0.IµF
50V E8
0603
GND
PG2
JP2
E19
R11
187k
1%
C18
47µF
10V
X5R
1206
C27
220pF
2
A
15
RUN4
100k
1%
1
3
VOUT3
INTVcc
R21
RUN3
RUN
200k
1%
NOTE: UNLESS OTHERWISE SPECIFIED.
RUN3
EXT
*
C35
1206
(Opt)
R12
L4
TRKSS2
3
JP5
E17
C14
27pF
27
R16
10.0k
1%
2
OFF
R3
464k
1%
C15
220µF
4V
1206
R5
L3
1.0µH
NPIS42LS1R0YTRF
NIC Comp. Corp.
TRKSS1
E5
VOUT2
3.3V /
C16
0.IµF
50V E6
0603
GND
VOUT2
25
BIAS
2
ON
R18
28.7k
1%
FB4
RST
SYNC
10
L2
2.2µH
XAL5030-222MEB
Coilcraft
36
*
200k
1%
PG3
VOUT2
(Opt)
C32
E20
R2
C11
0.1µF
50V
0402
PG2
PG4
C3
4.7pF
GND
PG4
SW4
GND
E13
PG4
PG1
R1
806k
1%
C4
47µF
10V
X5R
1206
41
E11
PG2
1
GND
PG1
FB3
EN/UVLO
38
R9
19.1k
1%
CPVIN4
4.7µF
10V
X7R
0805
GND
R8
19.1k
1%
VOUT4
SW3
PVIN4
GND
R7
19.1k
1%
VOUT3
17
35
R6
19.1k
1%
E9
VOUT2
FB2
16
VOUT1
R24
0 Ohm
GND
CPVIN3
4.7µF
10V
X7R
0805
C
13
R10
100k
1%
JP1
GND
3
OFF
5
E1
VOUT1
5V / 1A
C5
0.IµF
50V E3
0603
GND
VOUT1
26
VOUT2
9
1%
L1
4.7µH
XAL5030-472MEB
Coilcraft
6
SW2 7
SW2
PVIN3
GND
2
VOUT2
34
3
C2
0.1µF
50V
0402
PVIN2
8
1
EN/UVLO
ON
VIN
4
PVIN1
BST2
R4
340k
1
U1
LT8602EUJ#PBF
VISHAY
C30
10µF
50V
X5R
1206
VIN
2
4
3
2
IC NO.
N/A
DATE:
Jun 16, 2015
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
42V Quad Monolithic Step-Down
Regulator with Power-On Reset
LT8602EUJ
DEMO CIRCUIT 1949A
DC1949A_02_REV4
1
SHEET
1
REV.
4
OF
1
A
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