Datasheet

LTC4088
9
4088fb
block DiagraM
13
1
+ –
+ –
+ – + –
+ –
+
–
+ –
0.1V
UNDERTEMP
AVERAGE INPUT
CURRENT LIMIT
CONTROLLER
OVERTEMP
NTC
V
BUS
NTC
T
2
CLPROG
11
V
BUS
NTC FAULT
D1
NTC ENABLE
14
D2
4
D0
LOGIC
1.188V
+ –
+ + –
AVERAGE OUTPUT
VOLTAGE LIMIT
CONTROLLER
OSC
PWM
S
PWM
4.6V
100mV
SUSPEND
LDO
I
LDO
/MI
SWITCH
/N
TO USB
OR WALL
ADPAPTER
Q
R
3.6V
0.3V
1V 100mV
NTC
4088 BD
I
BAT
/1031 I
BAT
/1031
+
–
+ –
PROG
6
GND
15
5
C/X
7 9
BAD
CELL
CHRG
BAT
SINGLE
CELL
Li-Ion
OPTIONAL
EXTERNAL
IDEAL DIODE
PMOS
8
GATE
10
V
OUT
3
LDO3V3
TO 3.3V LOAD
TO SYSTEM LOAD
CONSTANT CURRENT
CONSTANT VOLTAGE
BATTERY CHARGER
+
–
0V
15mV
IDEAL DIODE
12
SW
ALWAYS ON
3.3V LDO
NONOVERLAP
AND DRIVE
LOGIC
+