LT1021
TYPICAL PERFOR A CE CHARACTERISTICS
Quiescent Current LT1021-5
1.8
1.6
1.4
INPUT CURRENT (mA)
I
OUT
= 0
CURRENT INTO OUTPUT (mA)
1.2
T
J
= – 55°C
1.0
0.8
0.6
0.4
0.2
0
0
5
10
15 20 25 30
INPUT VOLTAGE (V)
35
40
T
J
= 25°C
T
J
= 125°C
40
30
20
10
0
0
2
4
6
8 10 12 14
OUTPUT VOLTAGE (V)
16
18
OUTPUT CHANGE (mV)
Load Transient Response
LT1021-5, C
LOAD
= 0
I
SOURCE
= 0
I
SINK
= 0
OUTPUT VOLTAGE NOISE (5µV/DIV)
OUTPUT CHANGE (50mV/DIV)
OUTPUT CHANGE (20mV/DIV)
50mV
50mV
I
SOURCE
= 0.5mA
I
SOURCE
= 2-10mA
I
SINK
= 0.2mA
I
SINK
= 2-10mA
∆I
SOURCE
= 100µA
P-P
0
1
2
∆I
SINK
= 100µA
P-P
1
2
3
4
3 4 0
TIME (µs)
Output Voltage Temperature
Drift LT1021-7
7.003
7.002
OUTPUT CHANGE (mV)
OUTPUT VOLTAGE (V)
7.001
7.000
6.999
6.998
6.997
– 50 –25
2
1
0
–1
–2
–3
–4
INPUT CURRENT (mA)
50
0
75
25
TEMPERATURE (°C)
6
U W
LT1021 G10
LT1021 G13
Sink Mode* Current Limit
LT1021-5
60
50
V
IN
= 8V
Thermal Regulation LT1021-5
V
IN
= 25V
∆POWER
= 200mW
0
– 0.5
– 1.0
LOAD
REGULATION
THERMAL
REGULATION
I
LOAD
= 10mA
0
20
40 60 80
TIME (ms)
100 120 140
LT1021 G12
*NOTE THAT AN INPUT VOLTAGE IS REQUIRED
FOR 5V UNITS.
LT1021 G11
Load Transient Response
LT1021-5, C
LOAD
= 1000pF
I
SOURCE
= 0
I
SINK
= 0
Output Noise 0.1Hz to 10Hz
LT1021-5
FILTERING = 1 ZERO AT 0.1Hz
2 POLES AT 10Hz
5µV (1ppm)
20mV
20mV
I
SOURCE
= 0.2mA
I
SOURCE
= 2-10mA
I
SINK
= 0.2mA
I
SINK
= 2-10mA
∆I
SOURCE
= 100µA
P-P
0
5
∆I
SINK
= 100µA
P-P
5
10 15 20
LT1021 G14
10 15 20 0
TIME (µs)
0
1
4
3
2
TIME (MINUTES)
5
6
LT1021 G15
Load Regulation
LT1021-7, LT1021-10
5
4
3
V
IN
= 12V
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
Quiescent Current LT1021-7
I
OUT
= 0
T
J
= – 55°C
T
J
= 25°C
T
J
= 125°C
100
125
–5
–10 – 8 – 6 – 4 – 2
SOURCING
0
2
4 6 8
SINKING
10
0
0
5
10
15 20 25 30
INPUT VOLTAGE (V)
35
40
LT1021 G16
OUTPUT CURRENT (mA)
LT1021 G17
LT1021 G18
LINER [ LINEAR TECHNOLOGY ]
