lt3570 Linear Technology Corporation, lt3570 Datasheet - Page 18

• Manufacturer Part Number: lt3570
• Description: 1.5a Buck Converter, 1.5a Boost Converter And Ldo Controller
• Manufacturer: Linear Technology Corporation

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