Datasheet

LTC3577/LTC3577-1
24
3577fa
OPERATION
V
IN
I
LIM
I
SENSE
7
8
DFLS240L
0.1µF
10V
C
OUT
UP TO
1.2A
V
OUT
BAT
3577 F05
Li-Ion
Si2333DS
(OPT)
4.7µH
1
4
9
BOOST
V
C
42 4 41
39
37
38
LTC3577
WALL ACPR
IDGATE
V
OUT
BAT
324k
4.7µF
60V
HV
IN
7.5V TO 30V
(TRANSIENTS
TO 60V)
SW
5
6
23
V
OUT
LT3653
HIGH VOLTAGE
BUCK CIRCUITRY
GND
V
C
HVOK
+
Figure 5. LT3653 Buck Control Using V
C
BAT (V)
2.5
V
OUT
(V)
3.5
4.0
4.5
3577 F06
3.0
2.5
3
3.5
4
5.0
4.5
I
O
= 0.0A
I
O
= 0.75A
I
O
= 1.5A
BAT
Figure 6. V
OUT
Voltage vs Battery Voltage (LT3480)
BAT (V)
2.5
V
OUT
(V)
3.5
4.0
4.5
3577 F07
3.0
2.5
3
3.5
4
5.0
4.5
I
O
= 0.0A
I
O
= 0.6A
BAT
Figure 7. V
OUT
Voltage vs Battery Voltage (LT3505)