LT3505_15 Datasheet, PDF (21/24 Pages) Linear Technology – 1.2A, Step-Down Switching Regulator

TYPICAL APPLICATIONS
2.2MHz, 3.3V Step-Down Converter
V_IN
6V TO 36V
ON OFF
10V
CMPZ5240B
698k
1µF
V_IN
BOOST
SHDN
SW
LT3505
FB
R_T
GND
V_C
1N4148
0.1µF _3.3µH
V_OUT
3.3V
36.5k
22pF
MBRM140 11.3k
10µF
20.0k
100k
22pF
3505 TA02
1.2MHz, 1.8V Step-Down Converter
BAT54
V_IN
3.6V TO 25V
ON OFF
12V
CMPZ5242B
1.5M
2.2µF
V_IN
BOOST
SHDN
SW
LT3505
FB
R_T
GND
V_C
0.1µF _4.7µH
26.1k
MBRM140 20.0k
44.2k
60.4k
120pF
68pF
V_OUT
1.8V
1.2A
22µF
3505 TA03
LT3505
2.50
2.25
Switching
Frequency
2.00
Maximum
1.75
Load Current
1.50
1.25
1.0
0.75
0.50
0.25
0.00
5 10 15 20 25 30 35 40
Input Voltage [V]
LTC3505 • TA02b
1.60
1.40
1.20
1.00
0.80
0.60
0.40
0.20
0.00
0
Switching
Frequency
Maximum
Load Current
5
10
15
20
25
INPUT VOLTAGE (V)
LT3505 • TA03b
3505fc
21