Datasheet

LTC3556
34
3556f
TYPICAL APPLICATION
11
+
2625
24
23
29
21
22
MP1
C2
22µF
Li-Ion
510
TO OTHER
LOADS
324k
121k
105k
RED
2.5V TO
3.3V
1A
1.8V
400mA
MICROPROCESSOR
POR
0.8V TO
1.6V
400mA
L1
3.3µH
L2
2.2µH
SW
V
BUS
3
T
NTC
20
PROG
2
CLPROG
100k
12
LTC3555
V
OUT3
V
C3
7
14
8
1
FB3
SWCD3
9
SWAB3
LDO3V3
10
DV
CC
13,16
28
27
2
I
2
C (SCL, SDA)
V
OUT
BAT
GND
CHRG
GATE
2.2µF
330pF
15k
1µF
1µF
22µF
V
IN3
18
10pF
1.02M
C1: MURATA GRM21BR61A106KE19
C2: TDK C2012X5R0J226M
L1: COILCRAFT LPS4018-332LM
L2: COILCRAFT LPS4018-222MLC
L3, L4: TOKO 1098AS-4R7M
MP1: SILICONIX Si2333
806k
19
L3
4.7µH
SW2
17
FB2
I/O
CORE
10µF
33pF
V
IN2
ENALL
SEQ
5
10pF
806k
806k
4
L4
4.7µH
SW1
6
FB1
10µF
3556 TA02
V
IN1
15
PGOODALL
HDD
3.01k
2k
0.1µF
8.25
C1
10µF
USB/WALL
4.5V TO 5.5V
1µF
PUSHBUTTON
MICROCONTROLLER
10k
10pF
Watchdog Microcontroller Operation