LTC3555 Linear Technology, LTC3555 Datasheet - Page 13

• Manufacturer Part Number: LTC3555
• Description: High Efficiency USB Power Manager + Triple Step-Down DC/DC
• Manufacturer: Linear Technology

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BLOCK DIAGRAM
CLPROG
CHRG
IL
IL
DV
V
SDA
NTC
EN1
EN2
EN3
SCL
BUS
IM0
IM1
CC
25
21
27
28
16
13
10
2
3
7
8
9
TEMPERATURE
MONITOR
BATTERY
CHARGE
STATUS
DECODE
LOGIC
I
LIM
SUSPEND
500μA
LDO
I
1.188V
2
C PORT
–
+
REGULATOR
SWITCHING
PowerPath
2.25MHz
4
4
–
+
+
D/A
D/A
3.6V
0.3V
+ –
CHARGER
CC/CV
ENABLE
ENABLE
ENABLE
400mA 2.25MHz
400mA 2.25MHz
REGULATOR 1
REGULATOR 2
REGULATOR 3
SWITCHING
SWITCHING
1A 2.25MHz
SWITCHING
GND
29
IDEAL
3.3V LDO
–
+
15mV
+
–
3555 BD
26
24
22
23
20
18
17
19
11
12
14
15
1
5
6
4
SW
LDO3V3
V
GATE
BAT
PROG
V
SW1
FB1
V
SW2
FB2
V
SW3
FB3
RST3
OUT
IN1
IN2
IN3
LTC3555
13
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