IC LDO REG W/SHTDWN ADJ 8-SOIC

LT1521CS8

Manufacturer Part NumberLT1521CS8
DescriptionIC LDO REG W/SHTDWN ADJ 8-SOIC
ManufacturerLinear Technology
LT1521CS8 datasheet
 


Specifications of LT1521CS8

Regulator TopologyPositive AdjustableVoltage - Output3.8 ~ 20 V
Voltage - Input4.3 ~ 20 VVoltage - Dropout (typical)0.5V @ 300mA
Number Of Regulators1Current - Output300mA
Current - Limit (min)320mAOperating Temperature0°C ~ 125°C
Mounting TypeSurface MountPackage / Case8-SOIC (3.9mm Width)
Lead Free Status / RoHS StatusContains lead / RoHS non-compliant  
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W
U
TYPICAL PERFORMANCE CHARACTERISTICS
Shutdown Pin Threshold
(Off-to-On)
2.0
1.8
I
= 300mA
LOAD
1.6
1.4
1.2
I
= 1mA
LOAD
1.0
0.8
0.6
0.4
0.2
0
–50
–25
0
25
50
75
100
125
TEMPERATURE ( C)
LT1521 • TPC22
Adjust Pin Bias Current
200
175
150
125
100
75
50
25
0
–25
0
50
75
100
125
–50
25
TEMPERATURE ( C)
LT1521 • TPC25
Current Limit
0.6
V
= 7V
IN
V
= 0V
OUT
0.5
0.4
0.3
0.2
0.1
0
–50
25
50
75
100
125
–25
0
TEMPERATURE ( C)
LT1521 • TPC28
Shutdown Pin Current
3.0
V
= 0V
SHDN
2.5
2.0
1.5
1.0
0.5
0
50
100
125
–50
–25
0
25
75
TEMPERATURE ( C)
LT1521 • TPC23
Reverse Output Current
50
T
= 25 C
LT1521
J
45
V
= 0V
IN
CURRENT FLOWS
40
INTO OUTPUT PIN
V
= V
35
OUT
SENSE
(LT1521-3/LT1521-3.3
30
LT1521-5)
V
= V
(LT1521)
OUT
ADJ
25
LT1521-3.3
20
15
LT1521-3
10
LT1521-5
5
0
0
1
2
3
4
5
6
7
8
9
10
OUTPUT VOLTAGE (V)
LT1521 • TPC26
Reverse Output Current
8
V
= 0V
IN
7
V
= 3V (LT1521-3)
OUT
V
= 3.3V (LT1521-3.3)
OUT
6
V
= 5V (LT1521-5)
OUT
V
= 3.75V (LT1521)
OUT
5
4
3
2
1
0
–50
–25
0
25
50
75
100
125
TEMPERATURE ( C)
LT1521 • TPC29
LT1521/LT1521-3
LT1521-3.3/LT1521-5
Shutdown Pin Input Current
25
20
15
10
5
0
0
1
2
3
5
7
8
9
4
6
SHUTDOWN PIN VOLTAGE (V)
LT1521 • TPC24
Current Limit
0.6
V
= 0V
OUT
0.5
0.4
0.3
0.2
0.1
0
0
1
2
3
4
5
6
7
INPUT VOLTAGE (V)
LT1521 • TPC27
Ripple Rejection
66
V
= V
(NOMINAL) + 1V + 0.5V
IN
OUT
P-P
RIPPLE AT f = 120Hz
64
I
= 150mA
LOAD
62
60
58
56
54
52
–50
25
50
75
100
125
–25
0
TEMPERATURE ( C)
LT1521 • TPC30
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7