Datasheet

LT3083
8
3083fa
TYPICAL PERFORMANCE CHARACTERISTICS
Noise Spectral Density
Output Voltage Noise Error Amplifier Gain and Phase
Ripple Rejection, Single Supply
Ripple Rejection, Dual Supply,
V
CONTROL
Pin
Ripple Rejection, Dual Supply,
IN Pin
10
RIPPLE REJECTION (dB)
100
10M
3083 G25
0
10
100
70
60
90
80
50
40
30
20
1k 10k 100k 1M
FREQUENCY (Hz)
I
LOAD
= 0.1A
I
LOAD
= 1.5A
C
OUT
= 10µF CERAMIC
C
SET
= 0.1µF CERAMIC
RIPPLE = 50mV
P-P
V
IN
– V
CONTROL
= V
OUT(NOMINAL)
+ 2V
I
LOAD
= 0.5A
10
RIPPLE REJECTION (dB)
100
10M
3083 G26
0
15
120
105
90
75
60
45
30
1k 10k 100k 1M
FREQUENCY (Hz)
C
OUT
= 10µF CERAMIC
C
SET
= 0.1µF
V
IN
= V
OUT(NOMINAL)
+ 1V
V
CONTROL
= V
OUT(NOMINAL)
+ 2V
I
LOAD
= 0.1A
I
LOAD
= 1.5A
10
RIPPLE REJECTION (dB)
100
10M
3083 G27
0
15
120
105
90
75
60
45
30
1k 10k 100k 1M
FREQUENCY (Hz)
C
OUT
= 10µF CERAMIC
C
SET
= 0.1µF
V
IN
= V
OUT(NOMINAL)
+ 1V
V
CONTROL
= V
OUT(NOMINAL)
+ 2V
I
LOAD
= 0.5A
I
LOAD
= 0.1A
I
LOAD
= 1.5A
–50
RIPPLE REJECTOIN (dB)
50
150
3083 G28
70
72
80
78
76
79
77
75
74
73
71
25–25 0 75 100 125
TEMPERATURE (°C)
V
IN
= V
CONTROL
= V
OUT(NOMINAL)
+ 2V
RIPPLE = 500mV
P-P
, ƒ = 120Hz
I
LOAD
= 0.5A
C
SET
= 0.1µF, C
OUT
= 10µF
Ripple Rejection (120Hz)
10
ERROR AMPLIFIER NOISE
SPECTRAL DENSITY (nV/√Hz)
REFERENCE CURRENT NOISE
SPECTRAL DENSITY (pA/√Hz)
100
100k
3083 G29
10
1000
100
1
100
10
1k 10k
FREQUENCY (Hz)
3083 G30
V
OUT
100µV/DIV
TIME 1ms/DIV
V
OUT
= 1V, R
SET
= 20k
C
SET
= 0.1µF, C
OUT
= 10µF
I
LOAD
= 3A
10
GAIN (dB)
100
1M
3083 G31
–15
–12
21
12
9
18
15
6
3
0
–6
–3
–9
–396
–360
36
–108
–144
0
–36
–72
–180
–216
–288
–252
–324
1k 10k 100k
FREQUENCY (Hz)
PHASE
GAIN
I
LOAD
= 0.5A
I
LOAD
= 1.5A
I
LOAD
= 3A
T
A
= 25°C, unless otherwise noted.