Datasheet

LTC3555/LTC3555-X
13
3555fd
BLOCK DIAGRAM
11
14
29
+
+
–
+
–
ENABLE
V
IN3
SW3
FB3
GND
3555 BD
27
I
LIM0
21
CHRG
2
CLPROG
3
NTC
28
I
LIM1
16
EN1
7
EN2
13
EN3
8
DV
CC
10
SDA
9
SCL
1A 2.25MHz
SWITCHING
REGULATOR 3
12
5
4
ENABLE
V
IN2
SW2
FB2
400mA 2.25MHz
SWITCHING
REGULATOR 2
6
18
19
ENABLE
V
IN1
20
PROG
23
BAT
15mV
0.3V
3.6V
IDEAL
1.188V
SW1
FB1
15
RST3
400mA 2.25MHz
SWITCHING
REGULATOR 1
2.25MHz
PowerPath
SWITCHING
REGULATOR
17
D/A
D/A
4
4
I
2
C PORT
I
LIM
DECODE
LOGIC
CC/CV
CHARGER
CHARGE
STATUS
22
GATE
24
V
OUT
SW
+
–
+
–
+
–
3.3V LDO
BATTERY
TEMPERATURE
MONITOR
SUSPEND
LDO
500µA
26
LDO3V3
1
25
V
BUS