LT3481 LINER [Linear Technology], LT3481 Datasheet - Page 4

• Manufacturer Part Number: LT3481
• Description: 36V, 2A, 2.8MHz Step-Down Switching Regulator with 50?A Quiescent Current
• Manufacturer: LINER [Linear Technology]

LT3481
TYPICAL PERFORMANCE CHARACTERISTICS
4
100
4.0
3.5
3.0
2.5
2.0
1.5
1.0
80
70
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
0.0001
0
0
5
0
Effi ciency (V
No Load Supply Current
Maximum Load Current
FRONT PAGE APPLICATION
5
0.001
10
MINIMUM
10
TYPICAL
LOAD CURRENT (A)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
V
0.01
OUT
IN
15
15
= 12V
= 5.0V)
L: NEC PLC-0745-4R7
f: 800kHz
20
0.1
20
V
IN
V
T
L = 4.7μ
f = 800 kHz
25
= 24V
A
OUT
= 25 °C
T
25
1
A
= 5.0V
30
= 25°C
3481 G04
3481 G01
3481 G07
35
30
10
100
400
350
300
250
200
150
100
4.0
3.5
3.0
2.5
2.0
1.5
1.0
90
80
70
60
50
40
30
20
10
50
0.0001
0
0
–50
0
Effi ciency (V
No Load Supply Current
Switch Current Limit
CATCH DIODE: DIODES, INC. PDS360
V
V
IN
OUT
–25
= 12V
0.001
= 3.3V
V
20
INCREASED SUPPLY
CURRENT DUE TO CATCH
DIODE LEAKAGE AT
HIGH TEMPERATURE
IN
0
V
= 7V
IN
LOAD CURRENT (A)
TEMPERATURE (°C)
DUTY CYCLE (%)
= 24V
25
0.01
OUT
40
50
= 3.3V)
L: NEC PLC-0745-4R7
f: 800kHz
0.1
60
75 100 125 150
V
IN
= 12V
80
1
3481 G02
3481 G05
3481 G08
100
10
4.0
3.0
2.5
2.0
1.5
1.0
0.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
4.5
90
85
80
75
70
65
60
55
50
0
–50
0
5
Effi ciency
Maximum Load Current
Switch Current Limit
–25
0.5
SWITCHING FREQUENCY (MHz)
V
10
IN
TYPICAL
MINIMUM
DUTY CYCLE = 10 %
DUTY CYCLE = 90 %
= 24V
0
TEMPERATURE (°C)
INPUT VOLTAGE (V)
1
V
15
IN
25
= 12V
1.5
50
20
2
V
T
L = 4.7μ
f = 800 kHz
75
A
OUT
V
L = 10μH
LOAD = 1A
= 25 °C
OUT
25
2.5
= 3.3V
100
= 3.3V
3481 G03
3481 G09
3481 G06
3481fb
125
30
3