Datasheet

LTC4008
8
4008fb
BLOCK DIAGRAM
–
+
6
9k
1.19V
11.67μA
35mV
C/10
TBAD
EA
g
m
= 1m
g
m
= 1m
1.19V
FLAG
GND
7
13
2
17
I
CL
TGATE
BGATE
Q1
Q2
16
CLP
100mV
0.1μF
20μF
R
CL
5k
15
CLN
19
PGND
L1
397mV
R
T
NTC
0.47μF
10k
NTC
150k
–
+
–
+
CL1
g
m
= 1.4m
CONTROL
BLOCK
THERMISTOR
OSCILLATOR
4
8
BAT
3k
R
SENSE
CSP
I
TH
9
32.4k
WATCHDOG
DETECT t
OFF
CLP
DCIN
OV
OSCILLATOR
1.28V
PWM
LOGIC
S
R
Q
CHARGE
–
+
I
CMP
+
–
÷5
BUFFERED I
TH
18
0.1μF
PROG
4008 BD
R
PROG
26.7k
4.7nF
10
14
FAULT
5
ACP/SHDN
3
INFET*
Q3
DCIN
V
IN
20
1
–
+
CLP
–
+
5.8V *NOT USED IN THE LTC4008-1
3k
20μF
6K
0.12μF
12
11
–
+
CA1
CA2
–
+
Ω
Ω
Ω
V
FB
BATMON
I
REV
–
+
+
–
**
17mV