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LT1521 Datasheet(PDF) 3 Page - Linear Technology

Part # LT1521
Description  300mA Low Dropout Regulators with Micropower Quiescent Current and Shutdown
PDF  16 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1521 Datasheet(HTML) 3 Page - Linear Technology

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LT1521/LT1521-3
LT1521-3.3/LT1521-5
1521335fb
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Regulated Output Voltage
LT1521-3
VIN = 3.5V, IOUT = 1mA, TJ = 25°C
2.950
3.000
3.050
V
(Note 4)
4V < VIN < 20V, 1mA < IOUT < 300mA
q
2.900
3.000
3.100
V
LT1521-3.3
VIN = 3.8V, IOUT = 1mA, TJ = 25°C
3.250
3.300
3.350
V
4.3V < VIN < 20V, 1mA < IOUT < 300mA q
3.200
3.300
3.400
V
LT1521-5
VIN = 5.5V, IOUT = 1mA, TJ = 25°C
4.925
5.000
5.075
V
6V < VIN < 20V, 1mA < IOUT < 300mA
q
4.850
5.000
5.150
V
LT1521 (Note 5)
VIN = 4.3V, IOUT = 1mA, TJ = 25°C
3.695
3.750
3.805
V
4.8V < VIN < 20V, 1mA < IOUT < 300mA q
3.640
3.750
3.860
V
Line Regulation
LT1521-3
∆VIN = 4.5 to 20V, IOUT = 1mA
q
1.5
20
mV
LT1521-3.3
∆VIN = 4.8 to 20V, IOUT = 1mA
q
1.5
20
mV
LT1521-5
∆VIN = 5.5 to 20V, IOUT = 1mA
q
1.5
20
mV
LT1521 (Note 5)
∆VIN = 4.3 to 20V, IOUT = 1mA
q
1.5
20
mV
Load Regulation
LT1521-3
∆ILOAD = 1mA to 300mA, TJ ≤ 25°C– 20
– 30
mV
LT1521-3.3
∆ILOAD = 1mA to 300mA, TJ ≤ 25°C– 20
– 30
mV
LT1521-5
∆ILOAD = 1mA to 300mA, TJ ≤ 25°C– 25
– 45
mV
LT1521 (Note 5)
∆ILOAD = 1mA to 300mA, TJ ≤ 25°C– 20
– 30
mV
LT1521-3
∆ILOAD = 1mA to 300mA, TJ >25°C– 20
– 55
mV
LT1521-3.3
∆ILOAD = 1mA to 300mA, TJ > 25°C– 20
– 55
mV
LT1521-5
∆ILOAD = 1mA to 300mA, TJ > 25°C– 25
– 75
mV
LT1521 (Note 5)
∆ILOAD = 1mA to 300mA, TJ > 25°C– 20
– 55
mV
Dropout Voltage (Note 6)
ILOAD = 1mA, TJ = 25°C
130
170
mV
ILOAD = 1mA
q
250
mV
ILOAD = 50mA, TJ = 25°C
290
350
mV
ILOAD = 50mA
q
450
mV
ILOAD = 100mA, TJ = 25°C
350
420
mV
ILOAD = 100mA
q
550
mV
ILOAD = 150mA, TJ = 25°C
400
470
mV
ILOAD = 150mA
q
600
mV
ILOAD = 300mA, TJ = 25°C
500
600
mV
ILOAD = 300mA
q
750
mV
Ground Pin Current (Note 7)
ILOAD = 0mA
q
12
25
µA
ILOAD = 1mA
q
65
100
µA
ILOAD = 10mA
q
300
450
µA
ILOAD = 50mA
q
0.8
1.5
mA
ILOAD = 100mA
q
1.4
2.5
mA
ILOAD = 150mA
q
2.2
4.0
mA
ILOAD = 300mA
q
6.5
12.0
mA
Adjust Pin Bias Current (Notes 5, 8)
TJ = 25°C
50
100
nA
Shutdown Threshold
VOUT = Off to On
q
1.20
2.80
V
VOUT = On to Off
q
0.25
0.75
V
Shutdown Pin Current (Note 9)
VSHDN = 0V
q
2.0
5.0
µA
Quiescent Current in Shutdown (Note 10)
VIN = VOUT (NOMINAL) + 1V, VSHDN = 0V
q
612
µA
Ripple Rejection
VIN – VOUT = 1V(Avg), VRIPPLE = 0.5VP–P,50
58
dB
fRIPPLE = 120Hz, ILOAD = 150mA
Current Limit
VIN – VOUT = 7V, TJ = 25°C
400
800
mA
VIN = VOUT (NOMINAL) + 1.5V, ∆VOUT = – 0.1V
q
320
400
mA
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C.



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