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LT3045 Datasheet(PDF) 14 Page - Analog Devices

Part # LT3045
Description  18V, 1A Step-Down Silent Switcher 3 with Ultra-Low Noise Reference
PDF  45 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LT3045 Datasheet(HTML) 14 Page - Analog Devices

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Data Sheet
LT83201
analog.com
Rev. A 14 of 45
Figure 28. Minimum VIN as a Function of VSET
Figure 29. No-Load Supply Current
Figure 30. Switching Frequency vs. Temperature
Figure 31. Minimum On-Time vs. Temperature
Figure 32. Minimum On-Time vs. Load
Figure 33. ISET During Start-Up with Fast Start-Up
Enabled (vs. Temperature)
MINIMUM VIN
VSET
VSET (V)
0
1
2
3
4
5
6
7
8
9
10
11
12
13
0
2
4
6
8
10
12
14
16
VOUT = VSET = 1V
L = 2.2µH
DISCONTINUOUS CONDUCTION MODE
IN REGULATION
INPUT VOLTAGE (V)
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
RT = 47.5kΩ
TEMPERATURE (°C)
–50
–25
0
25
50
75
100
125
1.900
1.925
1.950
1.975
2.000
2.025
2.050
2.075
2.100
ILOAD = 1A
VSET = 0V, VOUT TO REGULATE TO 0V
fSW = 2MHz
FORCED CONTINUOUS MODE
TEMPERATURE (°C)
–50
–25
0
25
50
75
100
125
10.0
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
14.5
15.0
VSET = 0V, VOUT TO REGULATE 0V
fSW = 2MHz
FORCED CONTINUOUS MODE
LOAD CURRENT (A)
0
0.2
0.4
0.6
0.8
1
10
11
12
13
14
15
16
17
18
19
20
VSET = 1V
VIN = 3V
VIN = 12V
VIN = 18V
TEMPERATURE (°C)
–50
–25
0
25
50
75
100
125
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0



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