LTC3558
12
3558f
BLOCK DIAGRAM
of the full-scale charge current), unresponsive battery
(i.e., the battery voltage remains below 2.9V after one half
hour of charging) and battery temperature out of range.
CHRG
requires a pull-up resistor and/or LED to provide
indication.
V
CC
(Pin 20):
Battery Charger Input. A 1μF decoupling
capacitor to GND is recommended.
Exposed Pad (Pin 21):
Ground. The Exposed Pad must
be soldered to PCB ground to provide electrical contact
and rated thermal performance.
PIN FUNCTIONS
19
–
+
T
A
800x
BAT
1x
T
DIE
T
DIE
PV
IN1
OT
CA
NTCA
NTC REF
LOGIC
CHRG
20
2
PROG
BATTERY CHARGER
BUCK REGULATOR
CONTROL
LOGIC
MODE
EN
CLK
0.8V
18
PV
IN1
7
SW1
6
PV
IN2
8
V
OUT2
SWAB2
D
C
A
B
9
1
21
V
CC
16
HPWR
12
SUSP
NTC
MODE
MP
MN
EN1
EN2
FB1
MAXER
V
CC
BAT
BODY
–
+
G
m
BUCK-BOOST REGULATOR
3558 BD
CONTROL
LOGIC
MODE
EN
V
C2
GND
EXPOSED PAD
CLK
0.8V
–
+
UNDERVOLTAGE
LOCKOUT
DIE
TEMPERATURE
ERROR
AMP
BANDGAP
OSCILLATOR
2.25MHz
V
REF
= 0.8V
CLK
17
3
5
15
4
FB2
13
V
C2
14
11
SWCD2
10
PV
IN2
