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LT1521 查看數據表(PDF) - Linear Technology
零件编号
产品描述 (功能)
比赛名单
LT1521
300mA Low Dropout Regulators with Micropower Quiescent Current and Shutdown
Linear Technology
LT1521 Datasheet PDF : 16 Pages
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LT1521/LT1521-3
LT1521-3.3/LT1521-5
TYPICAL PERFORMANCE CHARACTERISTICS
LT1521-3
Ground Pin Current
8
7
6
5
4
3
2
T
J
= 25
°
C
*FOR V
OUT
= 3V
R
LOAD
= 10
Ω
I
LOAD
= 300mA*
R
LOAD
= 20
Ω
I
LOAD
= 150mA*
1
R
LOAD
= 30
Ω
I
LOAD
= 100mA*
0
0 1 2 3 4 5 6 7 8 9 10
INPUT VOLTAGE (V)
LT1521 • TPC13
LT1521-5
Ground Pin Current
1000
900
800
T
J
= 25
°
C
*FOR V
OUT
= 5V
700
R
LOAD
= 100
Ω
I
LOAD
= 50mA*
600
R
LOAD
= 200
Ω
500
I
LOAD
= 25mA*
400
R
LOAD
= 500
Ω
I
LOAD
= 10mA*
300
200
R
LOAD
= 5k
100
I
LOAD
= 1mA*
0
0 1 2 3 4 5 6 7 8 9 10
INPUT VOLTAGE (V)
LT1521 • TPC16
LT1521
Ground Pin Current
8
T
J
= 25
°
C
7 V
OUT
= V
ADJ
*FOR V
OUT
= 3.75V
6
5
R
LOAD
= 12.5
Ω
I
LOAD
=300mA*
4
3
R
LOAD
= 25
Ω
I
LOAD
=150mA*
2
1
R
LOAD
= 37.5
Ω
0
I
LOAD
=100mA*
0 1 2 3 4 5 6 7 8 9 10
INPUT VOLTAGE (V)
LT1521 • TPC19
LT1521-3.3
Ground Pin Current
1000
900
800
700
600
500
T
J
= 25
°
C
*FOR V
OUT
= 3.3V
R
LOAD
= 66
Ω
I
LOAD
= 50mA*
R
LOAD
= 132
Ω
I
LOAD
= 25mA*
400
R
LOAD
= 330
Ω
300
I
LOAD
= 10mA*
200
R
LOAD
= 3.3k
100
I
LOAD
= 1mA*
0
0 1 2 3 4 5 6 7 8 9 10
INPUT VOLTAGE (V)
LT1521 • TPC14
LT1521-5
Ground Pin Current
8
7
T
J
= 25
°
C
*FOR V
OUT
= 5V
6
R
LOAD
= 16.7
Ω
I
LOAD
= 300mA*
5
4
3
R
LOAD
= 33.3
Ω
I
LOAD
= 150mA*
2
1
R
LOAD
= 50
Ω
0
I
LOAD
= 100mA*
0 1 2 3 4 5 6 7 8 9 10
INPUT VOLTAGE (V)
LT1521 • TPC17
Ground Pin Current
10
9
8
V
IN
= 3V (LT1521-3)
V
IN
= 3.3V (LT1521-3.3)
V
IN
= 5V (LT1521-5)
T
J
= 125
°
C
V
IN
= 3.75V (LT1521)
7
DEVICE IS OPERATING
6
IN DROPOUT
5
T
J
= 25
°
C
4
T
J
= 55
°
C
3
2
1
0
0 50 100 150 200 250 300
OUTPUT CURRENT (mA)
LT1521 • TPC20
LT1521-3.3
Ground Pin Current
8
7
T
J
= 25
°
C
*FOR V
OUT
= 3.3V
6
5
R
LOAD
= 11
Ω
I
LOAD
= 300mA*
4
3
R
LOAD
= 22
Ω
I
LOAD
= 150mA*
2
1
R
LOAD
= 33
Ω
I
LOAD
= 100mA*
0
0 1 2 3 4 5 6 7 8 9 10
INPUT VOLTAGE (V)
LT1521 • TPC15
LT1521
Ground Pin Current
1000
900
800
700
T
J
= 25
°
C
V
OUT
= V
ADJ
*FOR V
OUT
= 3.75V
R
LOAD
= 75
Ω
I
LOAD
= 50mA*
600
R
LOAD
= 150
Ω
500
I
LOAD
= 25mA*
400
R
LOAD
= 375
Ω
300
I
LOAD
= 10mA*
200
R
LOAD
= 3.8k
100
I
LOAD
= 1mA*
0
0 1 2 3 4 5 6 7 8 9 10
INPUT VOLTAGE (V)
LT1521 • TPC18
Shutdown Pin Threshold
(On-to-Off)
2.0
1.8 I
LOAD
= 1mA
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
–50 –25
0 25 50 75 100 125
TEMPERATURE (
°
C)
LT1521 • TPC21
6
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