LTC3553-2_15 Datasheet, PDF (14/36 Pages) Linear Technology – Micropower USB Power Manager with Li-Ion Charger, Always-On LDO and Buck Regulator

LTC3553-2
BLOCK DIAGRAM
V_BUS 20
HPWR 1
SUSP 19
INPUT
CURRENT
LIMIT
CC/CV
CHARGER
EXTPWR UVLO
NTC 15
CHRG 14
BATTERY
TEMP
MONITOR
CHARGE
STATUS
1.125MHz
OSCILLATOR
÷
2048
OSC
0.8V
EN
STBY
200mA BUCK DC/DC
STBY 6
BUCK_ON 7
PBSTAT 3
ON 4
PUSHBUTTON
INTERFACE
AND
SEQUENCE
LOGIC
0.8V
EN
STBY
150mA LDO
5, 21
GND
POWER
GOOD
COMPARATORS
18 V_OUT
17 BAT
16 PROG
12 BVIN
13 SW
8 BUCK_FB
11 VINLDO
10 LDO
9 LDO_FB
2 PGOOD
35532 BD1
35532f
14