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LT1521-3 Datasheet(PDF) 6 Page - Linear Technology

Part # LT1521-3
Description  300mA Low Dropout Regulators with Micropower Quiescent Current and Shutdown
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1521-3 Datasheet(HTML) 6 Page - Linear Technology

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6
LT1521/LT1521-3
LT1521-3.3/LT1521-5
TYPICAL PERFORMANCE CHARACTERISTICS
INPUT VOLTAGE (V)
0
1000
900
800
700
600
500
400
300
200
100
0
8
LT1521 • TPC18
2
135
79
4
6
10
TJ = 25°C
RLOAD = 75Ω
ILOAD = 50mA*
RLOAD = 150Ω
ILOAD = 25mA*
RLOAD = 375Ω
ILOAD = 10mA*
RLOAD = 3.8k
ILOAD = 1mA*
VOUT = VADJ
*FOR VOUT = 3.75V
INPUT VOLTAGE (V)
0
1000
900
800
700
600
500
400
300
200
100
0
8
LT1521 • TPC16
2
135
79
4
6
10
TJ = 25°C
*FOR VOUT = 5V
RLOAD = 100Ω
ILOAD = 50mA*
RLOAD = 200Ω
ILOAD = 25mA*
RLOAD = 500Ω
ILOAD = 10mA*
RLOAD = 5k
ILOAD = 1mA*
LT1521-5
Ground Pin Current
INPUT VOLTAGE (V)
0
8
7
6
5
4
3
2
1
0
8
LT1521 • TPC17
2
4
6
10
7
1
3
5
9
TJ = 25°C
*FOR VOUT = 5V
RLOAD = 16.7Ω
ILOAD = 300mA*
RLOAD = 33.3Ω
ILOAD = 150mA*
RLOAD = 50Ω
ILOAD = 100mA*
LT1521-5
Ground Pin Current
LT1521
Ground Pin Current
LT1521
Ground Pin Current
INPUT VOLTAGE (V)
0
8
7
6
5
4
3
2
1
0
8
LT1521 • TPC19
2
4
6
10
7
1
3
5
9
TJ = 25°C
VOUT = VADJ
*FOR VOUT = 3.75V
RLOAD = 12.5Ω
ILOAD =300mA*
RLOAD = 25Ω
ILOAD =150mA*
RLOAD = 37.5Ω
ILOAD =100mA*
Ground Pin Current
Shutdown Pin Threshold
(On-to-Off)
TEMPERATURE (
°C)
–50
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
ILOAD = 1mA
OUTPUT CURRENT (mA)
0
0
2
3
4
5
6
7
50
100
150
200
LT1521 • TPC20
250
8
9
10
1
300
VIN = 3V (LT1521-3)
VIN = 3.3V (LT1521-3.3)
VIN = 5V (LT1521-5)
VIN = 3.75V (LT1521)
DEVICE IS OPERATING
IN DROPOUT
TJ = 125°C
TJ = 55°C
TJ = 25°C
INPUT VOLTAGE (V)
0
8
7
6
5
4
3
2
1
0
8
LT1521 • TPC13
2
4
6
10
7
1
3
5
9
TJ = 25°C
*FOR VOUT = 3V
RLOAD = 10Ω
ILOAD = 300mA*
RLOAD = 20Ω
ILOAD = 150mA*
RLOAD = 30Ω
ILOAD = 100mA*
INPUT VOLTAGE (V)
0
600
800
1000
900
700
500
300
100
8
LT1521 • TPC14
400
200
0
2
135
79
4
6
10
TJ = 25°C
*FOR VOUT = 3.3V
RLOAD = 66Ω
ILOAD = 50mA*
RLOAD = 132Ω
ILOAD = 25mA*
RLOAD = 330Ω
ILOAD = 10mA*
RLOAD = 3.3k
ILOAD = 1mA*
INPUT VOLTAGE (V)
0
8
7
6
5
4
3
2
1
0
8
LT1521 • TPC15
2
4
6
10
7
1
3
5
9
RLOAD = 11Ω
ILOAD = 300mA*
RLOAD = 22Ω
ILOAD = 150mA*
RLOAD = 33Ω
ILOAD = 100mA*
TJ = 25°C
*FOR VOUT = 3.3V
LT1521-3.3
Ground Pin Current
LT1521-3.3
Ground Pin Current
LT1521-3
Ground Pin Current


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