LT1521CST-3.3#TR Linear Technology, LT1521CST-3.3#TR Datasheet - Page 7
![IC LDO REG W/SD 3.3V SOT223-3](/photos/7/35/73514/sot-223-3_05-08-1630_sml.jpg)
LT1521CST-3.3#TR
Manufacturer Part Number
LT1521CST-3.3#TR
Description
IC LDO REG W/SD 3.3V SOT223-3
Manufacturer
Linear Technology
Datasheet
1.LT1521CST-5PBF.pdf
(16 pages)
Specifications of LT1521CST-3.3#TR
Regulator Topology
Positive Fixed
Voltage - Output
3.3V
Voltage - Input
4.3 ~ 20 V
Voltage - Dropout (typical)
0.5V @ 300mA
Number Of Regulators
1
Current - Output
300mA
Current - Limit (min)
320mA
Operating Temperature
0°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
SOT-223 (3 leads + Tab), SC-73, TO-261
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
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
V
J
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 • TPC26
LT1521 • TPC29
LT1521 • TPC23
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
TEMPERATURE ( C)
INPUT VOLTAGE (V)
(NOMINAL) + 1V + 0.5V
3
25
3
4
50
5
4
6
75
5
7
LT1521 • TPC30
LT1521 • TPC24
LT1521 • TPC27
P-P
100
1521335fb
6
8
7
125
9
7