Datasheet

LTC3557/LTC3557-1
27
35571fc
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
TYPICAL APPLICATION
V
IN
68nF
10µF
2.2µF
2.2µF
40.2k
4.7µF
0.47µF
22µF
6.8µH
3.3µH
4.7µH
4.7µH
OPTIONAL HIGH VOLTAGE
BUCK INPUT
DFLS240L
HV
IN
8V TO 38V
(TRANSIENTS
TO 60V)
150k
499k
510
Li-Ion
3.3V
25mA
ALWAYS ON
100k
Si2333DS
Si2333DS
(OPT)
2.1k
BOOST
42
RUN/SS SW
LT3480
GND V
C
V
C
WALL ACPR
V
BUS
V
OUT
5
R
T
10
PG
11 9
26
10µF
F
V
OUT
BAT
V
OUT1
3.3V
600mA
3
24
CLPROG
BV
IN1
27
2k
100k
PROG
20
V
NTC
NTC
LTC3557/
LTC3557-1
18
19
ILIM0
1
ILIM1
2
EN1
9
EN2
10
EN3
11
MODE
8
100k
NTC
PMIC
CONTROL
USB OR
5V WALL
ADAPTER
23
6
BV
IN2
16
CHRG
28
GATE
21
LDO3V3
4
SW1
5
FB1
7
BAT
22
25
BDSYNC
FBNC
7
NC
6
3
1
8
+
1.02M
324k
10pF 10µF
V
OUT3
1.8V
400mA
SW3
17
FB3
12
806k
649k
10pF 10µF
V
OUT2
1.2V
400mA
SW2
15
RST2
14
FB2
GND
13
29
232k
100k
RST2
464k
10pF
10µF
35571 TA02