LT3080 Просмотр технического описания (PDF) - Linear Technology
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LT3080 Datasheet PDF : 26 Pages
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LT3080
TYPICAL PERFORMANCE CHARACTERISTICS
VCONTROL Pin Current
25
20 ILOAD = 1.1A
DEVICE IN
CURRENT LIMIT
15
10
5
ILOAD = 1mA
0
0 6 12 18 24 30 36*
INPUT-TO-OUTPUT DIFFERENTIAL (V)
*SEE NOTE 9 IN ELECTRICAL
CHARACTERISTICS TABLE
3080 G18
Ripple Rejection, Single Supply
100
90
80
70
ILOAD = 100mA
ILOAD = 1.1A
60
50
40
30
20 VIN = VCONTROL = VOUT (NOMINAL) + 2V
10 RIPPLE = 50mVP-P
COUT = 2.2µF CERAMIC
0
10 100 1k 10k 100k 1M
FREQUENCY (Hz)
3080 G21
VCONTROL Pin Current
30
VCONTROL – VOUT = 2V
VIN – VOUT = 1V
25
20
TJ = –50°C
15
10
TJ = 25°C
5
TJ = 125°C
0
0 0.2 0.4 0.6 0.8 1.0 1.2
LOAD CURRENT (A)
3080 G19
Residual Output Voltage with
Less Than Minimum Load
0.8
SET PIN = 0V
0.7 VIN
0.6
VOUT
RTEST
0.5
0.4
VIN = 10V
VIN = 20V
0.3
VIN = 5V
0.2
0.1
0
0
1k
2k
RTEST (Ω)
3080 G20
Ripple Rejection, Dual Supply,
VCONTROL Pin
100
90
80
70
ILOAD = 100mA
ILOAD = 1.1A
60
50
40
30
20
VIN = VOUT (NOMINAL) + 1V
VCONTROL = VOUT (NOMINAL) +2V
10 COUT = 2.2µF CERAMIC
RIPPLE = 50mVP-P
0
10 100
1k
10k 100k 1M
FREQUENCY (Hz)
3080 G22
Ripple Rejection, Dual Supply,
IN Pin
100
90
80
70
60
50
40
30 VIN = VOUT (NOMINAL) + 1V
VCONTROL = VOUT (NOMINAL) +2V
20 RIPPLE = 50mVP-P
10
COUT = 2.2µF CERAMIC
ILOAD = 1.1A
0
10 100 1k 10k 100k 1M
FREQUENCY (Hz)
3080 G23
6
Ripple Rejection (120Hz)
80
79
78
77
76
75
74
73 SINGLE SUPPLY OPERATION
72
VIN = VOUT(NOMINAL) + 2V
RIPPLE = 500mVP-P, f = 120Hz
71 ILOAD = 1.1A
CSET = 0.1μF, COUT = 2.2μF
70
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3080 G24
Noise Spectral Density
10k
1k
1k
100
100
10
10
1.0
1
0.1
10
100
1k
10k
100k
FREQUENCY (Hz)
3080 G25
3080fb
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