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3681 Datasheet(PDF) 5 Page - Linear Technology

Part # 3681
Description  36V, 2A, 2.8MHz Step-Down Switching Regulator with Integrated Power Schottky Diode
PDF  24 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

3681 Datasheet(HTML) 5 Page - Linear Technology

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LT3681
5
3681f
BOOST DIODE CURRENT (A)
0
0.8
1.0
1.2
2.0
3681 G18
0.6
0.4
0
0.5
1.0
1.5
0.2
1.6
1.4
RUN/SS PIN VOLTAGE (V)
0
8
10
12
15
25
3681 G17
6
4
510
20
30
35
2
0
Switch Voltage Drop
Boost Pin Current
Feedback Voltage
Switching Frequency
Frequency Foldback
Minimum Switch On-Time
Soft Start
RUN/SS Pin Current
Boost Diode
SWITCH CURRENT (mA)
0
400
500
700
1500
2500
3681 G10
300
200
500
1000
2000
3000 3500
100
0
600
SWITCH CURRENT (mA)
0
0
10
30
40
50
2000
90
3681 G11
20
1000
500
2500 3000
1500
3500
60
70
80
TEMPERATURE (
°C)
–50
1.270
1.280
125
4681 G12
1.260
1.250
0
50
100
–25
25
75
1.290
1.265
1.275
1.255
1.285
TEMPERATURE (
°C)
–50
1.00
1.10
125
4681 G13
0.90
0.80
0
50
100
–25
25
75
1.20
RT = 45.3kΩ
0.95
1.05
0.85
1.15
FB PIN VOLTAGE (mV)
0
800
1000
1200
600
1000
3681 G14
600
400
200
400
800
1200 1400
200
0
RT = 45.3kΩ
TEMPERATURE (˚C)
–50
80
100
120
25
3681 G15
60
40
–25
0
50
75
100
125
20
0
140
RUN/SS PIN VOLTAGE (V)
0
3.5
1.5
3681 G16
2.0
1.0
0.5
1
2
0.5
0
4.0
3.0
2.5
1.5
2.5
3
3.5
TYPICAL PERFOR A CE CHARACTERISTICS T
A = 25°C unless otherwise noted.



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