Datasheet

9
4009fd
LTC4009
LTC4009-1/LTC4009-2
block DiagraM
(LTC4009)
–
–
–
+
–
+
19
EA
R1
TO
INTERNAL CIRCUITS
CC
–
+
CA
1.2085V
REFERENCE
5V
REGULATOR
PWM
LOGIC
BOOST AND
OV DETECTION
C/10
DETECTION
OSCILLATOR
BAT
SHUTDOWN
CONTROL
TO
INTERNAL
CIRCUITS
SHUTDOWN
OVERVOLTAGE
CHARGE
INPUT
CURRENT
LIMIT
TGATE
20
BOOST
12
ITH
13
PROG
14
CSN
15
CSP
18
SW
21
GND
4009 BD01
16
BGATE
17
INTV
DD
TO
INTERNAL
CIRCIUTS
11
V
FB
10
CHRG
8
FBDIV
9
DCDIV
5
ACP
7
SHDN
6
ICL
4
CLN
1
CLP
2
DCIN
3