LT1521 Linear Technology, LT1521 Datasheet - Page 7

• Manufacturer Part Number: LT1521
• Description: 300mA Low Dropout Regulators with Micropower Quiescent Current and Shutdown
• Manufacturer: Linear Technology

TYPICAL PERFORMANCE CHARACTERISTICS
200
175
150
125
100
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.6
0.5
0.4
0.3
0.2
0.1
75
50
25
0
0
0
–50
–50
–50
Shutdown Pin Threshold
(Off-to-On)
Adjust Pin Bias Current
Current Limit
V
V
IN
OUT
–25
–25
–25
= 7V
= 0V
I
LOAD
0
0
0
TEMPERATURE ( C)
TEMPERATURE ( C)
TEMPERATURE ( C)
= 1mA
25
25
25
I
LOAD
50
50
50
= 300mA
75
75
75
W
LT1521 • TPC22
LT1521 • TPC25
LT1521 • TPC28
100
100
100
U
125
125
125
3.0
2.5
2.0
1.5
1.0
0.5
50
45
40
35
30
25
20
15
10
0
5
0
8
7
6
5
4
3
2
1
0
–50
–50
Reverse Output Current
0
Shutdown Pin Current
Reverse Output Current
T
V
CURRENT FLOWS
INTO OUTPUT PIN
V
(LT1521-3/LT1521-3.3
LT1521-5)
V
J
V
IN
OUT
OUT
V
V
V
V
V
1
SHDN
= 25 C
–25
–25
IN
OUT
OUT
OUT
OUT
= 0V
= 0V
= V
= V
2
= 3V (LT1521-3)
= 3.3V (LT1521-3.3)
= 5V (LT1521-5)
= 3.75V (LT1521)
= 0V
SENSE
ADJ
OUTPUT VOLTAGE (V)
0
0
3
LT1521-3
TEMPERATURE ( C)
TEMPERATURE ( C)
LT1521-3.3
(LT1521)
4
25
25
5
50
50
6
LT1521
LT1521-5
75
7
75
8
LT1521 • TPC23
LT1521 • TPC26
LT1521 • TPC29
100
100
9
125
125
10
LT1521-3.3/LT1521-5
0.6
0.5
0.4
0.3
0.2
0.1
66
64
62
60
58
56
54
52
25
20
15
10
0
5
0
–50
0
Shutdown Pin Input Current
Current Limit
0
Ripple Rejection
V
RIPPLE AT f = 120Hz
I
LOAD
V
IN
–25
LT1521/LT1521-3
1
OUT
1
= V
SHUTDOWN PIN VOLTAGE (V)
= 150mA
2
= 0V
OUT
2
0
INPUT VOLTAGE (V)
TEMPERATURE ( C)
(NOMINAL) + 1V + 0.5V
3
25
3
4
50
5
4
6
75
5
7
LT1521 • TPC30
LT1521 • TPC24
LT1521 • TPC27
P-P
100
6
8
7
125
9
7