LTC3557_15 Datasheet, PDF (11/28 Pages) Linear Technology – USB Power Manager with Li-Ion Charger and Three Step-Down Regulators

BLOCK DIAGRAM
LTC3557/LTC3557-1
V_BUS
24
CLPROG
27
3
WALL
WALL
DETECT
25
ACPR
26
V_C
VC
CONTROL
INPUT
CURRENT
LIMIT
CC/CV
CHARGER
IDEAL
DIODE
+–
+
–
15mV
V_NTC
18
NTC
19
BATTERY
TEMP
MONITOR
CHRG
28
CHARGE
STATUS
ILIM0
1
ILIM1
2
EN1
9
EN2
10
EN3
11
MODE
8
RST2
14
ILIM
LOGIC
EN
LOGIC
3.3V
LDO
600mA, 2.25MHz
BUCK REGULATOR
OSC
REF
EN
MODE
400mA, 2.25MHz
BUCK REGULATOR
OSC
EN
MODE
400mA, 2.25MHz
BUCK REGULATOR
OSC
EN
MODE
GND
29
V_OUT
23
GATE
21
BAT
22
PROG
20
LDO3V3
4
V_IN1
6
SW1
5
FB1
7
V_IN2
16
SW2
15
FB2
13
SW3
17
FB3
12
35571 BD
35571fc
11