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LT3980 Datasheet(PDF) 4 Page - Linear Technology

Part # LT3980
Description  58V, 2A, 2.4MHz Step-Down Switching Regulator with 85A Quiescent Current
PDF  24 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3980 Datasheet(HTML) 4 Page - Linear Technology

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LT3980
4
3980fa
For more information www.linear.com/LT3980
INPUT VOLTAGE (V)
0
3980 G04
50
30
10
20
10
130
110
90
70
30
40
50
60
VOUT = 3.3V
DUTY CYCLE (%)
0
40
3980 G08
3.5
20
60
2.5
2.0
5.0
4.5
4.0
3.0
80
100
TYPICAL
MINIMUM
TEMPERATURE (°C)
–50
350
25
3980 G05
200
100
–25
0
50
50
0
400
300
250
150
75 100
150
125
VIN = 12V
VOUT = 3.3V
CATCH DIODE: DIODES, INC. PDS360
INCREASED SUPPLY
CURRENT DUE TO CATCH
DIODE LEAKAGE AT
HIGH TEMPERATURE
ILOAD (A)
0
0.5
1
2
3980 G02
1.5
VIN = 12V
VIN = 48V
f = 400kHz
D = DIODES, INC. SBR3U100LP
VIN = 24V
85
70
60
55
50
95
90
80
75
65
INPUT VOLTAGE (V)
3980 G07
2.0
3.5
3.0
2.5
TYPICAL
MINIMUM
5 10
20
30
40
50
15
25
35
45
60
55
INPUT VOLTAGE (V)
3980 G06
2.0
3.5
3.0
2.5
TYPICAL
MINIMUM
5 10
20
30
40
50
15
25
35
45
60
55
TEMPERATURE (°C)
4.0
4.5
5.5
5.0
3980 G09
3.5
3.0
2.0
2.5
6.5
6.0
DUTY CYCLE = 10%
–50
25
–25
0
50
75 100
150
125
Efficiency, VOUT = 5V
No-Load Supply Current
Maximum Load Current,
VOUT = 3.3V
Switch Current Limit
Switch Current Limit
Maximum Load Current,
VOUT = 5V
No-Load Supply Current
TA = 25°C unless otherwise noted.
SWITCHING FREQUENCY (MHz)
0.20
84
86
1.60
82
80
0.60
1.00
0.40
0.80
1.20
1.80
1.40
2.00
74
72
78
88
76
3.0
3.5
2.5
2.0
0.5
0
1.5
4.0
1.0
3980 G03
VIN = 12V
VOUT = 5V
IOUT = 2A
Typical perFormance characTerisTics
Efficiency, VOUT = 3.3V
Efficiency vs Switching Frequency
ILOAD (A)
0
0.5
1
2
3980 G01
1.5
VIN = 12V
VIN = 48V
f = 400kHz
D = DIODES, INC. SBR3U100LP
VIN = 24V
85
70
60
55
50
90
80
75
65



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