3506 データシートの表示（PDF） - Linear Technology
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3506 Datasheet PDF : 24 Pages
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LT3506/LT3506A
TYPICAL PERFOR A CE CHARACTERISTICS
Efficiency, VOUT = 1.8V (LT3506A)
100 VOUT = 1.8V
L = 4.7µH (COILCRAFT MSS6122-472MLB)
90 TA = 25°C
80
70
60
50
40
VIN = 4.5V
VIN = 12V
30
VIN = 25V
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
OUTPUT CURRENT (A)
3506 G01
Maximum Load Current,
VOUT = 1.8V (LT3506A)
1.8 TA = 25°C
L = 2.2µH
1.6
L = 1.5µH
1.4
L = 1µH
1.2
Efficiency, VOUT = 3.3V (LT3506)
100
VOUT = 3.3V
95 L = 6.4µH (SUMIDA CR54-6R4)
90 TA = 25°C
VIN = 5V
85
80
75
VIN = 12V
70
65
VIN = 25V
60
55
50
0
0.4
0.8
1.2
1.6
IOUT (A)
3506 G02
Maximum Load Current,
VOUT = 3.3V (LT3506A)
1.8 SLOPE COMPENSATION REQUIRES
L > 2.2µH FOR VIN < 7 WITH VOUT = 3.3V
TA = 25°C
1.6
L = 4.7µH
L = 3.3µH
1.4
L = 2.2µH
1.2
Efficiency, VOUT = 5V (LT3506)
100
VOUT = 5V
95 L = 10µH (COOPER UP1B-100)
90 TA = 25°C
VIN = 8V
85
80
75
VIN = 15V
70
VIN = 25V
65
60
55
50
0
0.4
0.8
1.2
1.6
IOUT (A)
3506 G03
Switch VCESAT
400
TA = 25°C
300
200
100
1.0
0 2 4 6 8 10 12 14 16
INPUT VOLTAGE (V)*
3506 G04
1.0
0
5
10
15
20
25
INPUT VOLTAGE (V)*
3506 G05
0
0
0.5
1.0
1.5
2.0
SW CURRENT (A)
3506 G06
Boost Pin Current
40 TA = 25°C
30
20
10
0
0
0.5
1.0
1.5
2.0
SWITCH CURRENT (A)
3506 G07
Current Limit vs Duty Cycle
3.0 TA = 25°C
2.5
TYPICAL
2.0
MINIMUM
1.5
1.0
0.5
Frequency vs Temperature
700
1.20
650
1.15
LT3506A
600
1.10
LT3506
550
1.05
0
500
1.00
0
20
40
60
80 100
–50 –25 0 25 50 75 100 125
DUTY CYCLE (%)
TEMPERATURE (°C)
3506 G08
3506 G10
3506afb
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