LT1521 Linear Technology, LT1521 Datasheet - Page 6

• Manufacturer Part Number: LT1521
• Description: 300mA Low Dropout Regulators with Micropower Quiescent Current and Shutdown
• Manufacturer: Linear Technology

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