Datasheet

LT3509
4
3509fd
For more information www.linear.com/LT3509
Typical perForMance characTerisTics
I
LOAD
(A)
0
EFFICIENCY (%)
0.8
3509 G01
65
70
75
80
85
90
60
0.2
0.4
0.6
95
V
IN
= 12V
T
A
= 25ºC
V
IN
= 24V
I
LOAD
(A)
0
EFFICIENCY (%)
0.8
3509 G02
60
65
70
75
80
85
90
55
0.2
0.4
0.6
95
V
IN
= 12V
T
A
= 25ºC
I
LOAD
(A)
0
EFFICIENCY (%)
0.8
3509 G03
55
60
65
70
75
80
85
50
0.2
0.4
0.6
90
V
IN
= 12V
T
A
= 25ºC
I
SW
(A)
0
V
CE(SAT)
(V)
1.00.8
3509 G04
0.05
0.1
0.15
0.2
0.25
0.3
0
0.2
0.4
0.6
0.35
T
A
= 25ºC
I
SW
(A)
0
I
BOOST
(mA)
0.8 1
3509 G05
5
10
15
20
0
0.2
0.4
0.6
25
T
A
= 25ºC
BOOST DIODE CURRENT (mA)
0
V
f
(V)
100 150
3509 G06
0.2
0.4
0.6
0.8
1
0
50
1.2
T
A
= 25ºC
R
T
(kΩ)
0
FREQUENCY (MHz)
120 140100 160 180
3509 G07
0.5
1.0
1.5
2.0
2.2
0
60 8020 40
T
A
= 25ºC
Efficiency vs Load Current
V
OUT
= 5V, f
SW
= 2.0MHz
Efficiency vs Load Current
V
OUT
= 3.3V, f
SW
= 2.0MHz
Efficiency vs Load Current
V
OUT
= 1.8V, f
SW
= 0.7MHz
Switch V
CE(SAT)
vs I
SW
I
BOOST
vs I
SW
Boost Diode Characteristics
Frequency vs R
T
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