lt3481imse-trpbf Linear Technology Corporation, lt3481imse-trpbf Datasheet - Page 5

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

TYPICAL PERFOR A CE CHARACTERISTICS
700
600
400
300
200
1.20
1.15
1.10
1.05
1.00
0.95
0.90
0.85
0.80
500
100
1.0
4.0
3.5
3.0
2.5
2.0
1.5
0.5
0
0
–50
0
0
Switch Voltage Drop
Switching Frequency
Soft Start
R
T
500
0.5
= 45.3kΩ
–25
RUN/SS PIN VOLTAGE (V)
1000
SWITCH CURRENT (mA)
1
0
TEMPERATURE (°C)
1500
1.5
25
2000
50
2
2500
2.5
75
W
3000 3500
100
3
3481 G10
3481 G16
4381 G13
U
3.5
125
1200
1000
800
600
400
200
90
80
70
60
50
40
30
20
10
12
10
0
0
0
8
6
4
2
0
0
Boost Pin Current
Frequency Foldback
RUN/SS Pin Current
0
R
T
200
= 45.3kΩ
500
5
1000
SWITCH CURRENT (mA)
RUN/SS PIN VOLTAGE (V)
400
FB PIN VOLTAGE (mV)
10
1500
600
15
2000
800
20
1000
2500 3000
25
1200 1400
30
3481 G11
3481 G14
3481 G17
3500
35
1.290
1.285
1.280
1.275
1.270
1.265
1.260
1.255
1.250
140
120
100
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
80
60
40
20
0
0
–50
–50
0
Feedback Voltage
Minimum Switch On-Time
Boost Diode
–25
–25
BOOST DIODE CURRENT (A)
0.5
0
0
TEMPERATURE (°C)
TEMPERATURE (˚C)
25
25
1.0
50
50
LT3481
75
75
1.5
100
100
4381 G12
3481 G15
3481 G18
5
3481f
125
125
2.0