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SHENZHEN YANGJING MICROELECTRONICS CO.,LTD
1A LOW DROPOUT LINEAR REGULATOR
GENERAL DESCRIPTION
The 1117 is a series of low dropout three-terminal egulators with a dropout of 1.15V at 1A output current.
The 1117 series provides current limiting and thermal shutdown. Its circuit includes a trimmed bandgap
reference to assure output voltage accuracy to be within 1%. Current limit is trimmed to ensure specified
output Current and controlled short-circuit current. On-chip thermal shutdown provides protection against any
combination of overload and ambient temperature that would create excessive junction temperature.
The 1117 has an adjustable version, that can provide the output voltage from 1.25V to 5V with only 2
external resistors.
The 1117 series is available in the industry standard SOT-223,SOT-89,TO-220,TO-252 and TO-263 power
packages.
FEATURES
Low Dropout Voltage: 1.15V at 1A Output Current
Trimmed Current Limit
On-Chip Thermal Shutdown
Three-Terminal Adjustable or Fixed 1.5V, 1.8V, 2.5V, 3.3V, 5V
Operation junction Temperature: 0 to125
APPLICATIONS
PC Motherboard
LCD Monitor
Graphic Card
DVD-Video player
NIC/Switch
Telecom Modem
ADSL Modem
Printer and other peripheral Equipment
YANGJING
MICROELECTRONICS
www.szyangjing.com
4007-888-606 2

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PIN CONFIGURATIONS
T Package
(SOT-223)
A Package
(SOT-89)
P Package
(TO-220)
U Package
(TO-252)
B Package
(TO-263)
ADJ/GND
OUTPUT
INPUT
Figure 2. Pin Configurations of 1117
D Package
(TO-251)
YANGJING
MICROELECTRONICS
www.szyangjing.com
4007-888-606 2

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1A LOW DROPOUT LINEAR REGULATOR
FUNCTIONAL BLOCK DIAGRAM
Figure 3. Functional Block Diagram of 1117
YANGJING
MICROELECTRONICS
www.szyangjing.com
4007-888-606 2

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1A LOW DROPOUT LINEAR REGULATOR
ORDERING INFORMATION
Package
Operating Junction Temperature Range
SOT-223
0 to 125
SOT-89
0 to 125
TO-220
0 to 125
TO-252
0 to 125
TO-263
0 to 125
TO-251
0 to 125
Χ 1117- Z
Package
T: SOT-223
A: SOT-89
P: TO-220
U: TO-252
B: TO-263
D: TO-251
YANGJING
MICROELECTRONICS
Circuit Type
ADJ: Adjustable Output
1.5: Fixed Output 1.5V
1.8: Fixed Output 1.8V
2.5: Fixed Output 2.5V
3.3: Fixed Output 3.3V
5.0: Fixed Output 5.0V
www.szyangjing.com
Part Number
T1117-ADJ
T1117-1.5
T1117-1.8
T1117-2.5
T1117-3.3
T1117-5.0
A1117-ADJ
A1117-1.5
A1117-1.8
A1117-2.5
A1117-3.3
A1117-5.0
P1117-ADJ
P1117-1.5
P1117-1.8
P1117-2.5
P1117-3.3
P1117-5.0
U1117-ADJ
U1117-1.5
U1117-1.8
U1117-2.5
U1117-3.3
U1117-5.0
B1117-ADJ
B1117-1.5
B1117-1.8
B1117-2.5
B1117-3.3
B1117-5.0
D1117-ADJ
D1117-1.5
D1117-1.8
D1117-2.5
D1117-3.3
D1117-5.0
4007-888-606 2

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ABOSLUTE MAXIMUM RATINGS (NOTE 1)
Parameter
Value
Unit
VIN
Maximum Junction Temperature
Storage Temperature Range
Lead Temperature (Soldering, 10sec.)
ESD (Machine Model)
20
150
-65 to 150
300
600
V
V
Note 1: Stresses greater than those listed under ”Absolute Maximum Ratings” may cause permanent damage to
the device. These are stress ratings only, and functional of the device at these or any other conditions beyond those
indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute Maximum Ratings” for
extended periods may affect device reliability.
RECOMMENDED OPERATING CONDITIONS
Parameter
Min Max Unit
VIN
Operating Junction Temperature Range
15 V
0 125
YANGJING
MICROELECTRONICS
www.szyangjing.com
4007-888-606 2