Datasheet
LT1083/LT1084/LT1085
8
108345fg
TYPICAL PERFORMANCE CHARACTERISTICS
TIME (μs)
0
OUTPUT VOLTAGE
DEVIATION (V)
LOAD CURRENT (A)
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
3
2
1
0
50
1083/4/5 ADJ G24
100
C
ADJ
= 0
C
ADJ
= 1μF
C
IN
= 1μF
C
OUT
= 10μF TANTALUM
V
OUT
=10V
V
IN
=13V
PRELOAD=100mA
FREQUENCY (Hz)
RIPPLE REJECTION (dB)
100
90
80
70
60
50
40
30
20
10
0
10 1k 10k 100k
1083/4/5 ADJ G19
100
V
RIPPLE
≤ 0.5V
P-P
V
RIPPLE
≤ 3V
P-P
(V
IN
– V
OUT
) ≥ 3V
(V
IN
– V
OUT
) ≥ V
DROPOUT
C
ADJ
= 200μF AT FREQUENCIES < 60Hz
C
ADJ
= 25μF AT FREQUENCIES > 60Hz
I
OUT
= 3A
OUTPUT CURRENT (A)
0
RIPPLE REJECTION (dB)
100
90
80
70
60
50
40
30
20
10
0
1.0 1.5
2.5
3.0
1083/4/5 ADJ G20
0.5 2.0
V
OUT
= 5V
C
ADJ
= 25μF
C
OUT
= 25μF
f
R
= 120Hz
V
RIPPLE
≤ 3V
P-P
f
R
= 20kHz
V
RIPPLE
≤ 0.5V
P-P
CASE TEMPERATURE (°C)
50
POWER (W)
50
40
30
20
10
0
LT1083/4/5 ADJ G21
60 70 80 90 100 110 120 130 140 150
LT1085MK
LT1085CT
LT1085CK
* AS LIMITED BY MAXIMUM JUNCTION TEMPERATURE
TIME (μs)
0
OUTPUT VOLTAGE
DEVIATION (V)
LOAD CURRENT (A)
0.6
0.4
0.2
0
–0.2
–0.4
8
6
4
2
0
50
1083/4/5 ADJ G22
100
C
ADJ
= 0
C
ADJ
= 1μF
C
IN
= 1μF
C
OUT
= 10μF TANTALUM
V
OUT
=10V
V
IN
=13V
PRELOAD=100mA
TIME (μs)
0
OUTPUT VOLTAGE
DEVIATION (V)
LOAD CURRENT (A)
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
6
4
2
0
50
1083/4/5 ADJ G23
100
C
ADJ
= 0
C
ADJ
= 1μF
C
IN
= 1μF
C
OUT
= 10μF TANTALUM
V
OUT
=10V
V
IN
=13V
PRELOAD=100mA
TIME (μs)
0
OUTPUT VOLTAGE
DEVIATION (mV)
INPUT
DEVIATION (V)
60
40
20
0
–20
–40
–60
14
13
12
100
1083/4/5 ADJ G26
200
C
ADJ
= 0
C
ADJ
= 1μF
V
OUT
= 10V
I
IN
= 0.2A
C
IN
= 1μF TANTALUM
C
OUT
= 10μF TANTALUM
TIME (μs)
0
OUTPUT VOLTAGE
DEVIATION (mV)
INPUT
DEVIATION (V)
60
40
20
0
–20
–40
–60
14
13
12
100
1083/4/5 ADJ G27
200
C
ADJ
= 0
C
ADJ
= 1μF
V
OUT
= 10V
I
IN
= 0.2A
C
IN
= 1μF TANTALUM
C
OUT
= 10μF TANTALUM
TIME (μs)
0
OUTPUT VOLTAGE
DEVIATION (mV)
INPUT
DEVIATION (V)
150
100
50
0
–50
–100
–150
14
13
12
100
1083/4/5 ADJ G25
200
C
ADJ
= 0
C
ADJ
= 1μF
V
OUT
= 10V
I
IN
= 0.2A
C
IN
= 1μF TANTALUM
C
OUT
= 10μF TANTALUM
LT1085
Ripple Rejection
LT1085
Ripple Rejection vs Current
LT1085
Maximum Power Dissipation*
LT1083
Load Transient Response
LT1084
Load Transient Response
LT1085
Load Transient Response
LT1083
Line Transient Response
LT1084
Line Transient Response
LT1085
Line Transient Response
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