LT3505
TYPICAL APPLICATIONS
2.2MHz, 3.3V Step-Down Converter
1N4148
2.50
2.25
2.00
1.75
1.50
1.25
1.0
V
V
OUT
IN
V
BOOST
SW
IN
3.3V
6V TO 36V
Switching
Frequency
0.1µF
3.3µH
ON OFF
SHDN
Maximum
Load Current
LT3505
GND
36.5k
11.3k
10V
CMPZ5240B
22pF
FB
MBRM140
10µF
R
V
T
C
698k
0.75
0.50
0.25
0.00
20.0k
100k
22pF
1µF
5
15
20
25
30
35
40
10
3505 TA02
Input Voltage [V]
LTC3505 • TA02b
1.2MHz, 1.8V Step-Down Converter
BAT54
1.60
1.40
1.20
1.00
V
IN
V
BOOST
SW
IN
3.6V TO 25V
0.1µF
4.7µH
V
1.8V
1.2A
OUT
ON OFF
SHDN
LT3505
GND
26.1k
20.0k
68pF
12V
CMPZ5242B
FB
0.80
0.60
MBRM140
22µF
R
V
C
T
1.5M
Switching
Frequency
0.40
0.20
0.00
44.2k
60.4k
120pF
Maximum
Load Current
2.2µF
5
10
20
0
25
15
INPUT VOLTAGE (V)
3505 TA03
LT3505 • TA03b
3505fc
21
Linear [ Linear ]
