Datasheet

LTC3553
14
3553fb
BLOCK DIAGRAM
0.8V
150mA LDO
EN
STBY
INPUT
CURRENT
LIMIT
CC/CV
CHARGER
BATTERY
TEMP
MONITOR
PUSHBUTTON
INTERFACE
AND
SEQUENCE
LOGIC
1.125MHz
OSCILLATOR
CHARGE
STATUS
0.8V
OSC
V
BUS
V
OUT
BAT
PROG
SW
BUCK_FB
V
INLDO
LDO
LDO_FB
HPWR
SUSP
NTC
EXTPWR UVLO
STBY
GND
3553 BD1
BUCK_ON
LDO_ON
PBSTAT
ON
CHRG
200mA BUCK DC/DC
EN
STBY
SEQ
20
18
17
16
BVIN
12
13
8
11
10
9
1
19
15
14
6
21
7
5
3
4
2
÷
2048