LT1521IST-3.3#PBF Linear Technology, LT1521IST-3.3#PBF Datasheet - Page 3

• Manufacturer Part Number: LT1521IST-3.3#PBF
• Description: IC LDO REG W/SD 3.3V SOT223-3
• Manufacturer: Linear Technology

Specifications of LT1521IST-3.3#PBF

• 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: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: SOT-223 (3 leads + Tab), SC-73, TO-261
• Voltage Regulator Type: Linear
• Topology: LDO
• Regulator Output Type: Fixed
• Polarity Type: Positive
• Number Of Outputs: Single
• Input Voltage (min): -20V
• Input Voltage (max): 20V
• Output Voltage: 3.3V
• Package Type: SOT-223
• Output Current: 300mA
• Load Regulation: -30mV
• Line Regulation: 20mV
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Dropout Voltage@current (max): 0.17@1mA/0.6@300mA
• Dropout Voltage@current (typ): 0.13@1mA/0.5@300mA
• Pin Count: 3 +Tab
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS Compliant

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