Datasheet

LTC3556
13
3556f
BLOCK DIAGRAM
11
12
29
+
+
–
+
–
V
IN3
A
B
D
C
SWAB3
V
OUT3
GND
3556 BD
21
CHRG
2
CLPROG
3
NTC
28
ENALL
10
DV
CC
27
SEQ
16
SDA
13
SCL
1A
2.25MHz
(BUCK-BOOST)
SWITCHING
REGULATOR 3
9
SWCD3
14
18
17
V
IN2
SW2
FB2
400mA
2.25MHz
(BUCK)
SWITCHING
REGULATOR 2
19
5
6
V
IN1
20
PROG
23
BAT
15mV
0.3V
3.6V
EN1
EN2
EN3
IDEAL
1.188V
SW1
FB1
8
V
C3
400mA
2.25MHz
(BUCK)
SWITCHING
REGULATOR 1
2.25MHz
PowerPath
SWITCHING
REGULATOR
4
D/A
D/A
4
4
I
2
C PORT
MASTER LOGIC
AND
SEQUENCER
CC/CV
CHARGER
3.3V LDO
CHARGE
STATUS
15
PGOODALL
POWER
GOOD
22
GATE
24
V
OUT
SW
+
–
+
–
+
–
BATTERY
TEMPERATURE
MONITOR
SUSPEND
LDO
500µA
26
LDO3V3
1
25
V
BUS
7
FB3