LT1521 Linear Technology, LT1521 Datasheet - Page 6
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LT1521
Manufacturer Part Number
LT1521
Description
300mA Low Dropout Regulators with Micropower Quiescent Current and Shutdown
Manufacturer
Linear Technology
Datasheet
1.LT1521.pdf
(16 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
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Part Number:
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Part Number:
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Part Number:
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LT
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Part Number:
LT1521CS8
Manufacturer:
LINEAR/凌特
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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