LGGQ View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LGGQ' PDF : 24 Pages View PDF
Typical Performance Characteristics
LT8614
Line Regulation
0.10
0.08
VOUT = 5V
ILOAD = 1A
0.06
0.04
0.02
0
–0.02
–0.04
–0.06
–0.08
–0.10
5
10 15 20 25 30 35
INPUT VOLTAGE (V)
40 45
8614 G10
No-Load Supply Current
5.0
4.5
VOUT = 3.3V
IN REGULATION
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0 5 10 15 20 25 30 35 40 45
INPUT VOLTAGE (V)
8614 G11
Top FET Current Limit vs Duty Cycle
9.0
8.5
8.0
7.5
7.0
6.5
6.0
0
0.2
0.4
0.6
0.8
1.0
DUTY CYCLE
8614 G13
Top FET Current Limit
9.5
9.0
8.5
5% DC
8.0
7.5
7.0
6.5
6.0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
8614 G14
Switch Drop
200
SWITCH CURRENT = 1A
175
150
125
TOP SWITCH
100
75
50
BOTTOM SWITCH
25
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
8614 G16
Switch Drop
500
450
400
350
300
TOP SWITCH
250
200
150
100
BOTTOM SWITCH
50
0
0
1
2
3
4
SWITCH CURRENT (A)
8614 G17
For more information www.linear.com/LT8614
No-Load Supply Current
25
VOUT = 3.3V
VIN = 12V
20 IN REGULATION
15
10
5
0
–55 –25
5 35 65 95
TEMPERATURE (°C)
125 155
8614 G12
Bottom FET Current Limit
7.5
7.0
6.5
6.0
5.5
5.0
4.5
4.0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
8614 G15
Minimum On-Time
40
38
ILOAD = 1A, VSYNC = 0V
ILOAD = 1A, VSYNC = 3V
36
ILOAD = 2A
ILOAD = 4A
34
32
30
28
26
24
22
20
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
8614 G18
8614fb
5
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