3083 Просмотр технического описания (PDF) - Linear Technology
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3083 Datasheet PDF : 28 Pages
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LT3083
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted.
Load Transient Response
150
VIN = 2V
100 VCONTROL = 3V
VOUT = 1V
50 CSET = 0.1µF
COUT = 22µF CERAMIC
0
–50
–100
COUT = 10µF CERAMIC
1.0
0.5
∆ILOAD = 100mA TO 1A
0
0 20 40 60 80 100 120 140 160 180 200
TIME (µs)
3083 G17
Load Transient Response
250
VIN = 2V
150 VCONTROL = 3V
VOUT = 1V
50 CSET = 0.1µF
–50
COUT = 22µF CERAMIC
–150
4
2
∆ILOAD = 500mA TO 3A
0
0 20 40 60 80 100 120 140 160 180 200
TIME (µs)
3083 G18
Line Transient Response
7
VOUT = 1V
6
ILOAD = 10mA
COUT = 10µF CERAMIC
5
CSET = 0.1µF
4
3
10
0
–10
–20
0 20 40 60 80 100 120 140 160 180 200
TIME (µs)
3083 G19
VCONTROL Pin Current
80
70
60
50
40
ILOAD = 3A
30
20
10 ILOAD = 1.5A
DEVICE IN
CURRENT LIMIT
0
0 2 4 6 8 10 12 14 16 18
IN-TO-OUT DIFFERENTIAL (VIN – VOUT) (V)
3083 G22
Turn-On Response
6
5
4
3
2
1
0
1.0
0.5
0
–0.5
0
RSET = 20k
CSET = 0
RLOAD = 0.33Ω
COUT = 10µF CERAMIC
5 10 15 20 25 30 35 40 45 50
TIME (µs)
3083 G20
VCONTROL Pin Current
70
VCONTROL – VOUT = 2V
60 VIN – VOUT = 1V
50
TJ = –50°C
40
30 TJ = 25°C
20
10
TJ = 125°C
0
0 0.5 1 1.5 2 2.5 3
LOAD CURRENT (A)
3083 G23
Turn-On Response
4
3
2
1
0
1.0
0.5
RSET = 20k
0
CSET = 0.1µF
RLOAD = 1Ω
–0.5
COUT = 10µF CERAMIC
0 2 4 6 8 10 12 14 16 18 20
TIME (ms)
3083 G21
Residual Output Voltage with
Less Than Minimum Load
600
VIN = 20V
500
VIN = 10V
400
VIN = 5V
300
ADD 1N4148 FOR
RTEST < 1k
200
SET PIN = 0V
VIN
100
VOUT
RTEST
0
0
500
1000
1500
2000
RSET (Ω)
3083 G24
3083fa
7
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