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LT1521 Datasheet(PDF) 7 Page - Analog Devices

Part # LT1521
Description  300mA Low Dropout Regulators with Micropower Quiescent Current and Shutdown
PDF  18 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LT1521 Datasheet(HTML) 7 Page - Analog Devices

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LT1521/LT1521-3
LT1521-3.3/LT1521-5
7
Rev. C
For more information www.analog.com
TYPICAL PERFORMANCE CHARACTERISTICS
Adjust Pin Bias Current
Reverse Output Current
Current Limit
LT1521
Ground Pin Current
Ground Pin Current
Shutdown Pin Threshold
(On-to-Off)
Shutdown Pin Threshold
(Off-to-On)
Shutdown Pin Current
Shutdown Pin Input 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 = 12.5
ILOAD =300mA*
RLOAD = 25
ILOAD =150mA*
RLOAD = 37.5
ILOAD =100mA*
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
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
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 • TPC22
–25
25
100 125
ILOAD = 1mA
ILOAD = 300mA
TEMPERATURE (°C)
–50
3.0
2.5
2.0
1.5
1.0
0.5
0
25
75
LT1521 • TPC23
–25
0
50
100
125
VSHDN = 0V
SHUTDOWN PIN VOLTAGE (V)
0
25
20
15
10
5
0
2
4
5
9
LT1521 • TPC24
1
3
6
7
8
TEMPERATURE (°C)
–50
25
LT1521 • TPC25
–25
0
50
200
175
150
125
100
75
50
25
0
75
100 125
OUTPUT VOLTAGE (V)
0
50
45
40
35
30
25
20
15
10
5
0
8
LT1521 • TPC26
3
5
7
9
4
6
10
TJ = 25°C
VIN = 0V
CURRENT FLOWS
INTO OUTPUT PIN
VOUT = VSENSE
(LT1521-3/LT1521-3.3
LT1521-5)
VOUT = VADJ (LT1521)
LT1521
LT1521-3.3
LT1521-3
LT1521-5
2
1
INPUT VOLTAGE (V)
0
0.6
0.5
0.4
0.3
0.2
0.1
0
3
5
LT1521 • TPC27
1
2
4
6
7
VOUT = 0V



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