DC473A - Schematic

A
NOTES:
B
C
D
E
UNLESS OTHERWISE SPECIFIED
4
4
Vin
VIN
C1
150uF
6.3V
SP
+
C3
10uF
Cer
2
2
C2
1uF
6.3V
D1
MBR0520LT1
R1
10
5%
E1
3V-7Vin
Gnd
D2
MBR0520LT1
1
2
4
3
Vout1+
3
4
E3
R7
1
7
8
R6
10K
R8
14K
6
7
2
C13
4700pF
1
C12
820pF
BG1
BG2
TG1
TG2
SW1
SW2
23
R4
10
22
PGND
IMAX1
Q1A
Si4922DY
Burst
2
8
Cont.
JP1
1
Gnd
C17
1uF
6.3V
9
10
E6
11
12
C18
27pF
1.8V
PWRGD1
PWRGD2
FAULT
FCB
RUN/SS1
COMP1
RUN/SS2
COMP2
SGND
FB2
FB1
VCC
U1
LTC1702ACGN
C5
1uF
6.3V
L2
1.5uH
IHLP-2525CZ-01-1.5uH
4
Vout2+
21
E4
20
19
+
R9
1
R10
1.6K
C14
4700pF
C15
680pF
R11
10K
18
C10
180uF
4V
SP
C11
1uF
6.3V
R15
47K
R17
10K
Pwrgd1
16
Q2A
Si4922DY
Gnd
E5
15
14
R12
4.75K
13
VIN
C19
27pF
R14
10K
Pwrgd2
R16
68K
C20
680pF
3
2
C16
1uF
6.3V
17
R13
8.06K
VIN
2.5V @ 5A
1
1.8V @ 5A
R5
1.2K
VIN
BOOST2
Q2B
Si4922DY
3
3
C9
180uF
4V
SP
IMAX2
BOOST1
C7
1uF
6.3V
8
7
5
C8 +
1uF
6.3V
PVCC
R2
14K
24
6
5
R3
10
1
C6
1uF
6.3V
3
5
6
L1
1.5uH
IHLP-2525CZ-01-1.5uH
Q1B
Si4922DY
1
E2
C4
1uF
6.3V
E7
C21
3300pF
Fault
E8
E9
2
2
SD1
SD2
E10
E11
SGND
PGND
LINEAR TECHNOLOGY CORPORATION
1
1
1630 McCARTHY BLVD.
MILPITAS, CA. 95035
408-432-1900
408-434-0507 FAX
Title
High Efficiency Dual Output Power Supply
Size
Document Number
DEMO 473A
Date:
A
B
C
D
Wednesday, June 12, 2002
Rev
A
LTC1702ACGN
Sheet
E
1
of
1
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