LT1121CN8-3.3#PBF Linear Technology, LT1121CN8-3.3#PBF Datasheet - Page 4

• Manufacturer Part Number: LT1121CN8-3.3#PBF
• Description: IC REG LDO 3.3V 150MA 8-DIP
• Manufacturer: Linear Technology

Specifications of LT1121CN8-3.3#PBF

• Regulator Topology: Positive Fixed
• Voltage - Output: 3.3V
• Voltage - Input: 4.17 ~ 30 V
• Voltage - Dropout (typical): 0.42V @ 150mA
• Number Of Regulators: 1
• Current - Output: 150mA
• Operating Temperature: 0°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Primary Input Voltage: 20V
• Output Voltage Fixed: 3.3V
• Dropout Voltage Vdo: 400mV
• No. Of Pins: 8
• Output Current: 150mA
• Voltage Regulator Case Style: DIP
• Operating Temperature Range: 0°C To +125°C
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Limit (min): -

ELECTRICAL CHARACTERISTICS
LT1121/LT1121-3.3/LT1121-5
impedance sources or logic running on supply voltages greater than 5.5V,
the maximum current driven into the shutdown pin must be limited to less
than 20mA.
Note 3: For junction temperatures greater than 110°C, a minimum load of
1mA is recommended. For T
may increase by 1%.
Note 4: Operating conditions are limited by maximum junction
temperature. The regulated output voltage specification will not apply for
all possible combinations of input voltage and output current. When
operating at maximum input voltage, the output current range must be
limited. When operating at maximum output current the input voltage
range must be limited.
Note 5: The LT1121 (adjustable version) is tested and specified with the
adjust pin connected to the output pin.
TYPICAL PERFOR A CE CHARACTERISTICS
4
120
100
0.7
0.6
0.5
0.4
0.3
0.2
0.1
80
60
40
20
0
0
0
0
Guaranteed Dropout Voltage
LT1121-3.3
Quiescent Current
= TEST POINTS
1
20
T
2
J
40
OUTPUT CURRENT (mA)
≤ 125°C
3
INPUT VOLTAGE (V)
V
SHDN
60
4
T
= OPEN
J
80
5
≤ 25°C
V
J
SHDN
> 110°C and I
100
6
= 0V
7
120
W
T
R
J
LOAD
8
= 25°C
140 160
1121 G27
1121 G04
9
=
U
OUT
∞
10
< 1mA, output voltage
120
100
0.7
0.6
0.5
0.4
0.3
0.2
0.1
80
60
40
20
0
–50
0
Dropout Voltage
0
LT1121-5
Quiescent Current
–25
1
I
LLOAD
2
0
TEMPERATURE (°C)
3
INPUT VOLTAGE (V)
= 100mA
4
25
V
SHDN
5
Note 6: Dropout voltage is the minimum input/output voltage required to
maintain regulation at the specified output current. In dropout the output
voltage will be equal to: (V
Note 7: Ground pin current is tested with V
current source load. This means that the device is tested while operating
in its dropout region. This is the worst case ground pin current. The
ground pin current will decrease slightly at higher input voltages.
Note 8: Adjust pin bias current flows into the adjust pin.
Note 9: Shutdown pin current at V
Note 10: Quiescent current in shutdown is equal to the sum total of the
shutdown pin current (6µA) and the ground pin current (9µA).
Note 11: Reverse output current is tested with the input pin grounded and
the output pin forced to the rated output voltage. This current flows into
the output pin and out of the ground pin.
50
6
= OPEN
I
V
LOAD
I
SHDN
LOAD
75
I
7
LOAD
T
R
= 150mA
J
= 50mA
LOAD
= 0V
8
= 25°C
= 1mA
100
1121 G14
1121 G02
9
=
∞
125
10
IN
120
100
10
40
30
20
10
– V
80
60
40
20
0
0
–50
0
Quiescent Current
LT1121
Quiescent Current
DROPOUT
V
R
SHDN
IN
LOAD
1
= 6V
–25
=
2
= 0V flows out of the shutdown pin.
∞
).
0
IN
TEMPERATURE (°C)
3
INPUT VOLTAGE (V)
V
= V
V
SHDN
V
SHDN
4
SHDN
25
OUT
= OPEN
5
= OPEN
= 0V
(nominal) and a
50
V
SHDN
6
75
= 0V
7
T
R
V
J
LOAD
OUT
= 25°C
8
100
= V
=
1121 G11
1121 G03
9
∞
ADJ
125
1121fc
10