Datasheet

LT8614
5
Rev. E
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TYPICAL PERFORMANCE CHARACTERISTICS
Top FET Current Limit vs Duty Cycle
Top FET Current Limit Bottom FET Current Limit
Switch Drop
Minimum On-TimeSwitch Drop
Line Regulation
No-Load Supply Current No-Load Supply Current
INPUT VOLTAGE (V)
5
–0.10
CHANGE IN V
OUT
(%)
–0.08
–0.04
–0.02
0
0.10
0.04
15
25
30
8614 G10
–0.06
0.06
0.08
0.02
10 20
35
40
45
V
OUT
= 5V
I
LOAD
= 1A
INPUT VOLTAGE (V)
0
0
INPUT CURRENT (µA)
0.5
1.5
2.0
2.5
5.0
3.5
10
20
25 45
8614 G11
1.0
4.0
4.5
3.0
5 15
30
35
40
V
OUT
= 3.3V
IN REGULATION
TEMPERATURE (°C)
–55 –25
0
INPUT CURRENT (µA)
10
25
5
65
95
8614 G12
5
20
15
35
125
155
V
OUT
= 3.3V
V
IN
= 12V
IN REGULATION
TEMPERATURE (°C)
–50
CURRENT LIMIT (A)
6.0
6.5
7.0
100 12525 50 75
8614 G15
5.5
5.0
–25 0 150
4.5
4.0
7.5
DUTY CYCLE
0
6.0
CURRENT LIMIT (A)
6.5
7.0
7.5
8.0
8.5
9.0
0.2 0.4 0.6 0.8
8614 G13
1.0
TEMPERATURE (°C)
–50
6.0
CURRENT LIMIT (A)
6.5
7.5
8.0
8.5
9.5
–25
75
125
8614 G14
7.0
9.0
50
150
0
25
100
5% DC
TEMPERATURE (°C)
–50
SWITCH DROP (mV)
100
150
150
8614 G16
50
0
0
50
100
–25
25
75
125
200
75
125
25
175
SWITCH CURRENT = 1A
TOP SWITCH
BOTTOM SWITCH
SWITCH CURRENT (A)
0
0
SWITCH DROP (mV)
50
150
200
250
500
350
1
2
8614 G17
100
400
450
300
3
4
TOP SWITCH
BOTTOM SWITCH
TEMPERATURE (°C)
–50
20
MINIMUM ON-TIME (ns)
22
26
28
30
40
34
0
50
75 100
8614 G18
24
36
38
32
–25
25
125
I
LOAD
= 1A, V
SYNC
= 0V
I
LOAD
= 1A, V
SYNC
= 3V
I
LOAD
= 2A
I
LOAD
= 4A
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