Datasheet

LT3570
18
3570fb
TYPICAL APPLICATIONS
DSL Modem
“Dying Gasp” System
V
IN1
SHDN1
SHDN2
SHDN3
SHDN1
SHDN2
SHDN3
SW1
FB1
C8
100nF
C7
1nF
C5
10nF
C2
22µF
C3
2.2µF
V
OUT3
3.3V
500mA
R3
118k
V
OUT2
5V
R8
25k
R1
105k
V
OUT1
8V
250mA
V
IN
8V TO 28V
R7
25k
R2
11.5k
R4
22.1k
R5
34.0k
R6
10.7k
3570 TA02
R9
20.0k
C9
10µF
C1
10µF
C6
1nF
10nF
L2
10µH
L1
4.7µH
D2
D3
D1
BOOST
SW2
FB2
SS2
NPN_DRV
FB3
V
C2
SS1
V
C1
V
IN2
V
IN3
BIAS
R
T
SYNC
LT3570
GND
Q1
V
IN1
SHDN1
SHDN2
SHDN3
SW1
FB1
C8
100nF
C7
1nF
C5
10nF
C2
22µF
C3
2.2µF
V
OUT3
2.5V
200mA
R3
205k
V
OUT2
3.3V
200mA
R8
51k
R1
442k
V
OUT1
34V
V
IN
12V
R7
20k
R2
10.5k
R4
64.9k
R5
137k
R6
64.9k
3570 TA03
R9
44.2k
C9
10µF
C10
0.1µF
C1
10µF
C6
1nF
C4
10nF
L2
22µH
L1
47µH
D2
D3
D1
BOOST
SW2
FB2
SS2
NPN_DRV
FB3
V
C2
SS1
V
C1
V
IN2
V
IN3
BIAS
R
T
SYNC
LT3570
GND
Q1