Datasheet

6
LT1521/LT1521-3
LT1521-3.3/LT1521-5
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TYPICAL PERFORMANCE CHARACTERISTICS
U
W
INPUT VOLTAGE (V)
0
GROUND PIN CURRENT (µA)
1000
900
800
700
600
500
400
300
200
100
0
8
LT1521 • TPC18
213579
4
6
10
T
J
= 25°C
R
LOAD
= 75Ω
I
LOAD
= 50mA*
R
LOAD
= 150Ω
I
LOAD
= 25mA*
R
LOAD
= 375Ω
I
LOAD
= 10mA*
R
LOAD
= 3.8k
I
LOAD
= 1mA*
V
OUT
= V
ADJ
*FOR V
OUT
= 3.75V
INPUT VOLTAGE (V)
0
GROUND PIN CURRENT (µA)
1000
900
800
700
600
500
400
300
200
100
0
8
LT1521 • TPC16
213579
4
6
10
T
J
= 25°C
*FOR V
OUT
= 5V
R
LOAD
= 100Ω
I
LOAD
= 50mA*
R
LOAD
= 200Ω
I
LOAD
= 25mA*
R
LOAD
= 500Ω
I
LOAD
= 10mA*
R
LOAD
= 5k
I
LOAD
= 1mA*
LT1521-5
Ground Pin Current
INPUT VOLTAGE (V)
0
GROUND PIN CURRENT (mA)
8
7
6
5
4
3
2
1
0
8
LT1521 • TPC17
2
4
6
10
7
1
3
5
9
T
J
= 25°C
*FOR V
OUT
= 5V
R
LOAD
= 16.7Ω
I
LOAD
= 300mA*
R
LOAD
= 33.3Ω
I
LOAD
= 150mA*
R
LOAD
= 50Ω
I
LOAD
= 100mA*
LT1521-5
Ground Pin Current
LT1521
Ground Pin Current
LT1521
Ground Pin Current
INPUT VOLTAGE (V)
0
GROUND PIN CURRENT (mA)
8
7
6
5
4
3
2
1
0
8
LT1521 • TPC19
2
4
6
10
7
1
3
5
9
T
J
= 25°C
V
OUT
= V
ADJ
*FOR V
OUT
= 3.75V
R
LOAD
= 12.5Ω
I
LOAD
=300mA*
R
LOAD
= 25Ω
I
LOAD
=150mA*
R
LOAD
= 37.5Ω
I
LOAD
=100mA*
Ground Pin Current
Shutdown Pin Threshold
(On-to-Off)
TEMPERATURE (°C)
–50
SHUTDOWN PIN THRESHOLD (V)
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
50
75
LT1521 • TPC21
–25
25
100
125
I
LOAD
= 1mA
OUTPUT CURRENT (mA)
0
0
GROUND PIN CURRENT (mA)
2
3
4
5
6
7
50
100
150 200
LT1521 • TPC20
250
8
9
10
1
300
V
IN
= 3V (LT1521-3)
V
IN
= 3.3V (LT1521-3.3)
V
IN
= 5V (LT1521-5)
V
IN
= 3.75V (LT1521)
DEVICE IS OPERATING
IN DROPOUT
T
J
= 125°C
T
J
= 55°C
T
J
= 25°C
INPUT VOLTAGE (V)
0
GROUND PIN CURRENT (mA)
8
7
6
5
4
3
2
1
0
8
LT1521 • TPC13
2
4
6
10
7
1
3
5
9
T
J
= 25°C
*FOR V
OUT
= 3V
R
LOAD
= 10Ω
I
LOAD
= 300mA*
R
LOAD
= 20Ω
I
LOAD
= 150mA*
R
LOAD
= 30Ω
I
LOAD
= 100mA*
INPUT VOLTAGE (V)
0
GROUND PIN CURRENT (µA)
600
800
1000
900
700
500
300
100
8
LT1521 • TPC14
400
200
0
213579
4
6
10
T
J
= 25°C
*FOR V
OUT
= 3.3V
R
LOAD
= 66Ω
I
LOAD
= 50mA*
R
LOAD
= 132Ω
I
LOAD
= 25mA*
R
LOAD
= 330Ω
I
LOAD
= 10mA*
R
LOAD
= 3.3k
I
LOAD
= 1mA*
INPUT VOLTAGE (V)
0
GROUND PIN CURRENT (mA)
8
7
6
5
4
3
2
1
0
8
LT1521 • TPC15
2
4
6
10
7
1
3
5
9
R
LOAD
= 11Ω
I
LOAD
= 300mA*
R
LOAD
= 22Ω
I
LOAD
= 150mA*
R
LOAD
= 33Ω
I
LOAD
= 100mA*
T
J
= 25°C
*FOR V
OUT
= 3.3V
LT1521-3.3
Ground Pin Current
LT1521-3.3
Ground Pin Current
LT1521-3
Ground Pin Current