DC2299A - Schematic

A
B
C
D
E
REVISION HISTORY
ECO
VIN
C4 IS FOR DEMO BOARD TEST ONLY
VIN
E1
APPROVED
DATE
PRODUCTION
VICTOR K.
12-29-14
IntVcc
C36
2.2uF
100V
1210
+
C4
47uF/63V
+
C29
OPT
R31
IntVcc
E2
R24
100k
U1
Vout2 Vout1
EXTVCC
R33
R4
20
OPT
E10
PGOOD1
R25
OPT
PGND
ExtVcc
IntVCC
BURST
IntVcc
4
R2
GND
E5
100K
JP1
21
IntVcc
Vout1
19
C21
4.7uF
16V
C30
1uF
0
MODE
1
2
3
4
5
6
PLS SKIP
6
E3
IntVcc
FC
PLLIN/MODE
27
Vout2
*
0
C28
OPT
35.7K
E9
R28
0
SYNC
R18
Vin
PGOOD
R1
OPT
C6
0.1uF
0805
5
C35
2.2uF
100V
1210
FREQ
C34
2.2uF
100V
1210
22
4
DESCRIPTION
2.2
6V UP TO 60V
GND
REV
1
R3
R8
R5
0
R9
100k
12
C13
1800pF
C8
OPT
R11
R15
20K
13
Vout1
7.15k
OPT
R17
OPT
VFB1
ITH2
ITH1
R10
10K
1
C10
1800pF
R12
Vout2
C14
100pF
R16
3
VFB2
100k
2
18.7k
C9
OPT
R6
C11
100pF
OPT
3
R7
OPT
14
C19
0.01uF
R20
TRACK/SS1
RUN2
10
0
RUN1
Sense2-
Sense1-
Sense2+
Sense1+
28
8
11
0
C7
0.01uF
RUN1
R13
4
0
C12
1000pF
R14
C20
1000pF
R21
C5
2.2uF
100V 1210
TRACK/SS2
9
RUN2
3
0
VIN
VIN
C22
2.2uF
100V 1210
GND
5
Boost2
D2
OPT
4
R30
2.0
4
Boost1
23
Vout1
L1
RS1
5.6uH
0.005
VOUT1
2
E6
BG1
C16
470uF/6.3V
24
R29
2.0
4
D1
OPT
4
1
2
3
C26
OPT
1206
BG1
Q1
RJK0651DPB
25
3
2
1
C24
10uF
1210
3
2
1
C23
OPT
SW1
BG2
17
C1
150uF/16V
5
+
SW2
18
2.2uF
100V
1210
5V / 8A
+
5
16
BG2
12V / 5A
TG1
4
1
2
3
15uH
TG2
TG1
5
0.008
Q3
RJK0651DPB
SGND
E7
L2
26
7
VOUT2
2
RS2
15
TG2
3
2
1
Vout2
4
C27
OPT
1206
C15
10uF
1210
C17
OPT
1
2
3
C3
2.2uF
100V
1210
5
5
C2
GND
IntVcc
E4
Q6
OPT
Q4
RJK0652DPB
C25
D3
0.1uF
D4
DFLS1100
DFLS1100
C18
Q2
RJK0652DPB
Q5
OPT
E8
0.1uF
*
VIN
RUN1
1
1
ON
2
R22
OFF
JP3
2
RUN1
R26
OPT
C32
OPT
CUSTOMER NOTICE
RUN2
3
OFF
3
JP2
R27
C33
OPT
OPT
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS AND CAPACITORS ARE 0603.
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.
B
-B
LTC3890EGN-1
C
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
LT
VICTOR K. TITLE: SCHEMATIC
SCALE = NONE
D
1630 McCarthy Blvd.
Milpitas, CA 95035 www.linear.com
Phone: (408)432-1900
Fax: (408)434-0507
1
LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY
LOW QUIESCENT CURRENT
DUAL OUTPUT HIGH VOLTAGE STEP-DOWN CONVERTER
SIZE
N/A
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
A
LTC3890EGN-3
1 Meg
1
ON
U1
-A
R23
RUN2
OPT
ASSY
DATE:
IC NO.
REV.
LTC3890EGN-1 / LTC3890EGN-3
DEMO CIRCUIT 2299A
Monday, December 29, 2014
SHEET
E
1
1
OF
1
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