DC1998A - Schematic

5
4
3
2
1
REVISION HISTORY
ECO
REV
__
VIN
D
E1
C2
2.2uF
100V
1210
6V UP TO 60V
GND
APPROVED
DATE
PRODUCTION
VICTOR K.
1-08-15
INTVCC
R1
VIN
DESCRIPTION
2
C3
2.2uF
100V
1210
C4
2.2uF
100V
1210
C36
2.2uF
100V
1210
+ CIN1
C37
2.2uF
100V
1210
R2
0
0805
+ CIN2
C5
0.1uF
100V
0805
47uF/63V
OPT
63HVH47M 63HVH47M
R3
0
U1
LTC3892EUHF
22
E3
VIN
VPRG1
ILIM
DRVCC
R6
0
R7
OPT
R12
OPT
R13
OPT
E2
D
INTVCC
MODE
FC
R14
35.7K
PLS SKIP
R11
OPT
ILIM
SYNC
0
C1
OPT
INTVCC
R4
OPT
R10
OPT
28
8
R5
0
BURST
1
3
5
2
4
6
R8
100K
JP1
C6
20
PGOOD1
E4
R9
INTVCC
DRVCC
DRVSET
14
4.7uF 0805
3
PGOOD1
DRVUV
PGOOD2
FREQ
13
1 Meg
4
PGOOD2
VOUT1
INTVCC
R16
0
1 Meg
R17
OPT
PLLIN/MODE
EXTVCC
21
EXTVCC
C9
1uF
11
R21
0
R24
100k
12
20K
C12
1800pF
R25
7.15k
C13
100pF
15
RUN1
6
R26
VOUT1
OPT
R28
OPT
INTVCC
INTVCC
C8
5
R20
OPT
R29
C16
.01uF
0
R32
9
C17
1nF
10
VFB2
VFB1
ITH2
ITH1
TRACK/SS2
TRACK/SS1
RUN1
RUN2
SENSE2-
SENSE1-
SENSE2+
SENSE1+
30
C14
100pF
27
7
TG2
TG1
C18
1nF
31
SW1
+
+
C24
10uF
35V
Q3
1206
BSC036NE7NS3 G
C23
OPT
1206
C25
OPT
4
Q4
OPT
3
2
1
7343
GND
BG2
BG1
VIN
25
C20
2.2uF
100V 1210
BOOST2
BOOST1
0
0.1uF
D1
OPT
1
4
23
24
2
R35
C22
0
0.1uF
4
VOUT1
L1
BSC057N08NS3 G
5.6uH
D2
OPT
DRVCC
Q2
1
2
3
R34 18
5
C21
15uH
5
C31
150uF
16V
VOUT2
OPT
C15
R31
.01uF OPT
0
R33
26
GND
0.008
1206
C11
1800pF
R27
R30
32
33
E7
12V / 5A
BSC057N08NS3 G
VOUT1
5
SW2
DRVCC
2
1
4
Q5
BSC036NE7NS3 G
3
2
1
VOUT2
L2
4
3
2
1
RS2
10K
RUN2
5
17
5
B
0
0
16
19
Q1
R19
0
C
0
C19 VIN
2.2uF
1210 100V
VOUT2
R18
R22
29
5
27pF
R23
VOUT2
EXTVCC
0.1uF
C10
C
C7
OPT
2
0.005
1206
C27
10uF
35V
1206
Q6
OPT
4
B
RS1
E8
C28
OPT
1206
C26
OPT
+
+
5V / 8A
C32
470uF 6.3V
7343
GND
E9
VIN
Vin_EMI
VIN
L3
TP1
GND
C35
C34
OPT
OPT
OPT
C33
RUN1
OPT
1
TP2
ON
GND
OFF
A
R40
0
E11
2
VIN
VIN
R36
OPT
0805
RUN1
RUN2
1
ON
3
2
R38
OPT
C29
OPT
VIN
R37
OPT
0805
RUN2
3
OFF
JP2
R41
0
JP3
R39
OPT
C30
OPT
CUSTOMER NOTICE
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.
GND
E12
NOTE: UNLESS OTHERWISE SPECIFIED
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
4
3
2
TECHNOLOGY
LT
VICTOR K.
1. ALL RESISTORS AND CAPACITORS ARE 0603.
5
VOUT1
E10
1
2
3
E6
1
R15
1
2
3
VOUT2
E5
TITLE: SCHEMATIC
LOW IQ DUAL OUTPUT HIGH VOLTAGE STEP-DOWN CONVERTER
SIZE
N/A
SCALE = NONE
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
DATE:
IC NO.
LTC3892EUHF
REV.
2
DEMO CIRCUIT 1998A
Thursday, January 08, 2015
SHEET 1
1
OF 1
A
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