LT1085 LINER [Linear Technology], LT1085 Datasheet - Page 6

• Manufacturer Part Number: LT1085
• Description: 7.5A, 5A, 3A Low Dropout Positive Adjustable Regulators
• Manufacturer: LINER [Linear Technology]

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