Linear Technology LT3081, Datasheet

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LT3081
8
3081fc
For more information www.linear.com/LT3081
Ripple Rejection Ripple Rejection
Output Impedance Ripple Rejection (120Hz)
Residual Output Voltage with
Less Than Minimum Load
Current Source
Turn-On Response
Current Source
Turn-On Response
TIME (µs)
0
OUTPUT CURRENT (mA)
INPUT VOLTAGE (V)
0
1
2
160 180
3081 G28
150
100
0
40 80 120 20 200 60 100 140
50
4
3
R
SET
= 6.04k
R
OUT
= 3.01Ω
C
OUT
= 0
C
SET
= 20pF
100mA CURRENT SOURCE CONFIGURATION
TIME (µs)
0
OUTPUT CURRENT (A)
INPUT VOLTAGE (V)
0
1
2
160 180
3081 G29
1.5
1.0
0
40 80 120 20 200 60 100 140
0.5
4
3
R
SET
= 6.04k
R
OUT
= 0.3Ω
C
OUT
= 0
C
SET
= 20pF
1A CURRENT SOURCE CONFIGURATION
R
TEST
(Ω)
0
OUTPUT VOLTAGE (mV)
400
500
600
2000
3081 G30
300
200
0
500
1000
1500
100
800
700
V
IN
= 36V
V
IN
= 5V
V
OUT
SET PIN = 0V
R
TEST
V
IN
FREQUENCY (Hz)
10 100
40
RIPPLE REJECTION (dB)
50
60
70
80
1k 10k 100k 1M 10M
3081 G31
30
20
10
0
90
100
I
LOAD
= 100mA
I
LOAD
= 500mA
I
LOAD
= 1.5A
C
OUT
= 2.2µF CERAMIC
C
SET
= 0.1µF
V
IN
= V
OUT(NOMINAL)
+ 2V
FREQUENCY (Hz)
10 100
40
RIPPLE REJECTION (dB)
50
60
70
80
1k 10k 100k 1M 10M
3081 G32
30
20
10
0
90
100
V
IN
= V
OUT
+ 5V
V
IN
= V
OUT
+ 2V
V
IN
= V
OUT
+ 1.5V
C
OUT
= 2.2µF CERAMIC
C
SET
= 0.1µF
I
LOAD
= 100mA
FREQUENCY (Hz)
10
1
OUTPUT IMPEDANCE (Ω)
10
100
1k
10k
100k
1M
10M
100 1k 10k 100k 1M 10M
3081 G33
I
SOURCE
= 10mA
I
SOURCE
= 100mA
I
SOURCE
= 1A
CURRENT SOURCE CONFIGURATION
TEMPERATURE (°C)
–50
70
RIPPLE REJECTION (dB)
72
76
78
80
90
84
0 50 75
3081 G34
74
86
88
82
–25 25 100 125 150
V
IN
= V
OUT(NOMINAL)
+ 2V
RIPPLE = 500mV
P-P
f = 120Hz
I
LOAD
= 0.1A
C
OUT
= 2.2µF
C
SET
= 0.1µF
Linear Regulator
Turn-On Response
TIME (ms)
0
OUTPUT VOLTAGE (V)
INPUT VOLTAGE (V)
0
1
2
16 18
3081 G27
1.0
0.5
–0.5
4 8 12 2 20 6 10 14
0
4
3
R
SET
= 20k
R
LOAD
= 0.67Ω
C
OUT
= 2.2µF CERAMIC
C
SET
= 0.1µF
Typical perForMance characTerisTics
T
J
= 25°C unless otherwise specified.