3509 データシートの表示（PDF） - Linear Technology
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3509 Datasheet PDF : 24 Pages
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LT3509
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency vs Load Current
VOUT = 5V, fSW = 2.0MHz
95
TA = 25ºC
90
VIN = 12V
85
80
VIN = 24V
75
70
65
60
0
0.2
0.4
0.6
0.8
ILOAD(A)
3509 G01
Efficiency vs Load Current
VOUT = 3.3V, fSW = 2.0MHz
95
TA = 25ºC
90
85
VIN = 12V
80
75
70
65
60
55
0
0.2
0.4
0.6
0.8
ILOAD(A)
3509 G02
Efficiency vs Load Current
VOUT = 1.8V, fSW = 0.7MHz
90
TA = 25ºC
85
80
75
VIN = 12V
70
65
60
55
50
0
0.2
0.4
0.6
0.8
ILOAD(A)
3509 G03
Switch VCE(SAT) vs ISW
0.35
TA = 25ºC
0.3
0.25
0.2
0.15
0.1
0.05
0
0
0.2 0.4 0.6
ISW(A)
0.8
1.0
3509 G04
IBOOST vs ISW
25
TA = 25ºC
20
15
10
5
0
0
0.2 0.4
0.6
0.8
1
ISW(A)
3509 G05
4
Boost Diode Characteristics
1.2
TA = 25ºC
1
0.8
0.6
0.4
0.2
0
0
50
100
150
BOOST DIODE CURRENT (mA)
3509 G06
Frequency vs RT
2.2
2.0
TA = 25ºC
1.5
1.0
0.5
0
0 20 40 60 80 100 120 140 160 180
RT(kΩ)
3509 G07
3509fc
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