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LT1521 Datasheet(PDF) 8 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) 8 Page - Analog Devices

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LT1521/LT1521-3
LT1521-3.3/LT1521-5
8
Rev. C
For more information www.analog.com
TYPICAL PERFORMANCE CHARACTERISTICS
LT1521-5
Transient Response
LT1521-5
Transient Response
Ripple Rejection
Load Regulation
FREQUENCY (Hz)
100
90
80
70
60
50
40
30
20
10
0
10
1k
10k
1M
LT1521 • TPC31
100
100k
ILOAD = 150mA
VIN = 6V + 50mVRMS RIPPLE
COUT = 33µF
SOLID TANTALUM
COUT = 3.3µF
SOLID TANTALUM
TEMPERATURE (°C)
–50
25
LT1521 • TPC32
–25
0
50
0
–5
–10
–15
–20
–25
–30
–35
–40
75
100 125
∆ILOAD = 1mA TO 300mA
LT1521-3.3
LT1521-3
LT1521*
LT1521-5
VIN = VOUT (NOMINAL + 1V)
*VADJ = VOUT
TIME (µs)
0
0.2
0.1
0
–0.1
–0.2
150
100
50
400
LT1521 • TPC33
100
50
150
250
350
450
200
300
500
VIN = 6V
CIN = 0.1µF
COUT = 1.5µF
TIME (ms)
0
0.2
0.1
0
–0.1
–0.2
300
200
100
4.0
LT1521 • TPC34
1.0
0.5
1.5
2.5
3.5
4.5
2.0
3.0
5.0
VIN = 6V
CIN = 0.1µF
COUT = 33µF
Current Limit
Reverse Output Current
Ripple Rejection
TEMPERATURE (°C)
–50
0.6
0.5
0.4
0.3
0.2
0.1
0
25
75
LT1521 • TPC28
–25
0
50
100
125
VIN = 7V
VOUT = 0V
TEMPERATURE (°C)
–50
25
LT1521 • TPC29
–25
0
50
8
7
6
5
4
3
2
1
0
75
100 125
VIN = 0V
VOUT = 3V (LT1521-3)
VOUT = 3.3V (LT1521-3.3)
VOUT = 5V (LT1521-5)
VOUT = 3.75V (LT1521)
TEMPERATURE (°C)
–50
66
64
62
60
58
56
54
52
25
75
LT1521 • TPC30
–25
0
50
100
125
VIN = VOUT (NOMINAL) + 1V + 0.5VP-P
RIPPLE AT f = 120Hz
ILOAD = 150mA



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