LT1083/LT1084/LT1085
TYPICAL PERFORMANCE CHARACTERISTICS
Minimum Operating Current
10
MINIMUM OPERATING CURRENT (mA)
9
1.26
ADJUST PIN CURRENT (µA)
REFERENCE VOLTAGE (V)
8
7
6
5
4
3
2
1
0
0
20
15
10
25
30
5
INPUT/OUTPUT DIFFERENTIAL (V)
35
T
J
= –55°C
T
J
= 25°C
T
J
= 150°C
LT1083/4/5 ADJ G10
LT1083
Ripple Rejection
100
90
80
RIPPLE REJECTION (dB)
70
60
50
40
30
20
10
0
10
100
1k
10k
FREQUENCY (Hz)
100k
C
ADJ
= 200µF AT FREQUENCIES < 60Hz
C
ADJ
= 25µF AT FREQUENCIES > 60Hz
I
OUT
= 7A
V
RIPPLE
≤
3V
P-P
V
RIPPLE
≤
0.5V
P-P
RIPPLE REJECTION (dB)
(V
IN
– V
OUT
)
≥
3V
POWER (W)
(V
IN
– V
OUT
)
≥
V
DROPOUT
LT1084
Ripple Rejection
100
90
80
RIPPLE REJECTION (dB)
70
60
50
40
30
20
10
0
10
100
1k
10k
FREQUENCY (Hz)
100k
C
ADJ
= 200µF AT FREQUENCIES < 60Hz
C
ADJ
= 25µF AT FREQUENCIES > 60Hz
I
OUT
= 5A
V
RIPPLE
≤
3V
P-P
V
RIPPLE
≤
0.5V
P-P
RIPPLE REJECTION (dB)
(V
IN
– V
OUT
)
≥
3V
(V
IN
– V
OUT
)
≥
V
DROPOUT
60
50
40
30
20
10
0
0
POWER (W)
U W
1083/4/5 ADJ G13
1083/4/5 ADJ G16
Temperature Stability
1.27
100
90
80
70
60
50
40
30
20
10
1.23
–50 –25
0
25 50 75 100 125 150
TEMPERATURE (°C)
LT1083/4/5 ADJ G11
Adjust Pin Current
1.25
1.24
0
–50 –25
0
25 50 75 100 125 150
TEMPERATURE (°C)
LT1083/4/5 ADJ G12
LT1083
Ripple Rejection vs Current
100
90
80
70
60
50
40
30
20
10
0
0
1
6
4
3
2
5
OUTPUT CURRENT (A)
7
8
V
OUT
= 5V
C
ADJ
= 25µF
C
OUT
= 25µF
f
R
= 20kHz
V
RIPPLE
≤
0.5V
P-P
f
R
= 120Hz
V
RIPPLE
≤
3V
P-P
100
90
80
70
60
50
40
30
20
10
0
LT1083
Maximum Power Dissipation*
LT1083MK
LT1083CP
LT1083CK
1083/4/5 ADJ G14
50 60 70 80 90 100 110 120 130 140 150
CASE TEMPERATURE (°C)
* AS LIMITED BY MAXIMUM JUNCTION TEMPERATURE
LT1083/4/5 ADJ G15
LT1084
Ripple Rejection vs Current
100
90
80
70
f
R
= 20kHz
V
RIPPLE
≤
0.5V
P-P
f
R
= 120Hz
V
RIPPLE
≤
3V
P-P
60
50
LT1084
Maximum Power Dissipation*
LT1084MK
40
30
LT1084CT
20
LT1084CP
V
OUT
= 5V
C
ADJ
= 25µF
C
OUT
= 25µF
1
4
3
2
OUTPUT CURRENT (A)
5
10
0
LT1084CK
1083/4/5 ADJ G17
50 60 70 80 90 100 110 120 130 140 150
CASE TEMPERATURE (°C)
* AS LIMITED BY MAXIMUM JUNCTION TEMPERATURE
LT1083/4/5 ADJ G18
108345fe
5
LINER [ LINEAR TECHNOLOGY ]
