lt3481imse-trpbf Linear Technology Corporation, lt3481imse-trpbf Datasheet - Page 4

• Manufacturer Part Number: lt3481imse-trpbf
• Description: 36v, 2a, 2.8mhz Step-down Switching Regulator With 50?a Quiescent Current
• Manufacturer: Linear Technology Corporation

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