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LM1117/LM1117I 800mA Low-Dropout Linear Regulator
April 2006
LM1117/LM1117I
800mA Low-Dropout Linear Regulator
General Description
The LM1117 is a series of low dropout voltage regulators
with a dropout of 1.2V at 800mA of load current. It has the
same pin-out as National Semiconductor’s industry standard
LM317.
The LM1117 is available in an adjustable version, which can
set the output voltage from 1.25V to 13.8V with only two
external resistors. In addition, it is also available in five fixed
voltages, 1.8V, 2.5V, 2.85V, 3.3V, and 5V.
The LM1117 offers current limiting and thermal shutdown. Its
circuit includes a zener trimmed bandgap reference to as-
sure output voltage accuracy to within
±
1%.
The LM1117 series is available in LLP, TO-263, SOT-223,
TO-220, and TO-252 D-PAK packages. A minimum of 10µF
tantalum capacitor is required at the output to improve the
transient response and stability.
Features
n
Available in 1.8V, 2.5V, 2.85V, 3.3V, 5V, and Adjustable
Versions
n
Space Saving SOT-223 and LLP Packages
n
Current Limiting and Thermal Protection
n
Output Current
800mA
n
Line Regulation
0.2% (Max)
n
Load Regulation
0.4% (Max)
n
Temperature Range
— LM1117
0˚C to 125˚C
— LM1117I
−40˚C to 125˚C
Applications
n
n
n
n
n
2.85V Model for SCSI-2 Active Termination
Post Regulator for Switching DC/DC Converter
High Efficiency Linear Regulators
Battery Charger
Battery Powered Instrumentation
Typical Application
Active Terminator for SCSI-2 Bus
10091905
Fixed Output Regulator
10091928
© 2006 National Semiconductor Corporation
DS100919
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LM1117/LM1117I
Ordering Information
Package
3-lead
SOT-223
Temperature
Range
0˚C to +125˚C
Part Number
LM1117MPX-ADJ
LM1117MPX-1.8
LM1117MPX-2.5
LM1117MPX-2.85
LM1117MPX-3.3
LM1117MPX-5.0
−40˚C to +125˚C
LM1117IMPX-ADJ
LM1117IMPX-3.3
LM1117IMPX-5.0
3-lead TO-220
0˚C to +125˚C
LM1117T-ADJ
LM1117T-1.8
LM1117T-2.5
LM1117T-2.85
LM1117T-3.3
LM1117T-5.0
3-lead TO-252
0˚C to +125˚C
LM1117DTX-ADJ
LM1117DTX-1.8
LM1117DTX-2.5
LM1117DTX-2.85
LM1117DTX-3.3
LM1117DTX-5.0
−40˚C to +125˚C
LM1117IDTX-ADJ
LM1117IDTX-3.3
LM1117IDTX-5.0
8-lead LLP
0˚C to +125˚C
LM1117LDX-ADJ
LM1117LDX-1.8
LM1117LDX-2.5
LM1117LDX-2.85
LM1117LDX-3.3
LM1117LDX-5.0
−40˚C to 125˚C
LM1117ILDX-ADJ
LM1117ILDX-3.3
LM1117ILDX-5.0
TO-263
0˚C to +125˚C
LM1117SX-ADJ
LM1117SX-2.85
LM1117SX-3.3
LM1117SX-5.0
Packaging Marking
N03A
N12A
N13A
N04A
N05A
N06A
N03B
N05B
N06B
LM1117T-ADJ
LM1117T-1.8
LM1117T-2.5
LM1117T-2.85
LM1117T-3.3
LM1117T-5.0
LM1117DT-ADJ
LM1117DT-1.8
LM1117DT-2.5
LM1117DT-2.85
LM1117DT-3.3
LM1117DT-5.0
LM1117IDT-ADJ
LM1117IDT-3.3
LM1117IDT-5.0
1117ADJ
1117-18
1117-25
1117-28
1117-33
1117-50
1117IAD
1117I33
1117I50
LM1117SADJ
LM1117S2.85
LM1117S3.3
LM1117S5.0
Transport Media
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Rails
Rails
Rails
Rails
Rails
Rails
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
Tape and Reel
TS3B
LDC08A
TD03B
T03B
NSC
Drawing
MP04A
www.national.com
2
LM1117/LM1117I
Block Diagram
10091901
Connection Diagrams
SOT-223
TO-263
10091944
Top View
10091904
Top View
10091945
TO-220
Side View
LLP
10091902
Top View
TO-252
10091946
When using the LLP package
Pins 2, 3 & 4 must be connected together and
Pins 5, 6 & 7 must be connected together
Top View
10091938
Top View
3
www.national.com
LM1117/LM1117I
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Maximum Input Voltage (V
IN
to GND)
Power Dissipation (Note 2)
Junction Temperature (T
J
)
(Note 2)
Storage Temperature Range
Lead Temperature
20V
Internally Limited
150˚C
-65˚C to 150˚C
TO-220 (T) Package
SOT-223 (IMP) Package
ESD Tolerance (Note 3)
260˚C, 10 sec
260˚C, 4 sec
2000V
Operating Ratings
(Note 1)
Input Voltage (V
IN
to GND)
Junction Temperature Range (T
J
)(Note 2)
LM1117
LM1117I
0˚C to 125˚C
−40˚C to 125˚C
15V
LM1117 Electrical Characteristics
Typicals and limits appearing in normal type apply for T
J
= 25˚C. Limits appearing in
Boldface
type apply over the entire junc-
tion temperature range for operation, 0˚C to 125˚C.
Symbol
V
REF
Parameter
Reference Voltage
Conditions
LM1117-ADJ
I
OUT
= 10mA, V
IN
-V
OUT
= 2V, T
J
= 25˚C
10mA
≤
I
OUT
≤
800mA, 1.4V
≤
V
IN
-V
OUT
≤
10V
LM1117-1.8
I
OUT
= 10mA, V
IN
= 3.8V, T
J
= 25˚C
0
≤
I
OUT
≤
800mA, 3.2V
≤
V
IN
≤
10V
LM1117-2.5
I
OUT
= 10mA, V
IN
= 4.5V, T
J
= 25˚C
0
≤
I
OUT
≤
800mA, 3.9V
≤
V
IN
≤
10V
LM1117-2.85
I
OUT
= 10mA, V
IN
= 4.85V, T
J
= 25˚C
0
≤
I
OUT
≤
800mA, 4.25V
≤
V
IN
≤
10V
0
≤
I
OUT
≤
500mA, V
IN
= 4.10V
LM1117-3.3
I
OUT
= 10mA, V
IN
= 5V T
J
= 25˚C
0
≤
I
OUT
≤
800mA, 4.75V≤ V
IN
≤
10V
LM1117-5.0
I
OUT
= 10mA, V
IN
= 7V, T
J
= 25˚C
0
≤
I
OUT
≤
800mA, 6.5V
≤
V
IN
≤
12V
∆V
OUT
Line Regulation
(Note 6)
LM1117-ADJ
I
OUT
= 10mA, 1.5V
≤
V
IN
-V
OUT
≤
13.75V
LM1117-1.8
I
OUT
= 0mA, 3.2V
≤
V
IN
≤
10V
LM1117-2.5
I
OUT
= 0mA, 3.9V
≤
V
IN
≤
10V
LM1117-2.85
I
OUT
= 0mA, 4.25V
≤
V
IN
≤
10V
LM1117-3.3
I
OUT
= 0mA, 4.75V
≤
V
IN
≤
15V
LM1117-5.0
I
OUT
= 0mA, 6.5V
≤
V
IN
≤
15V
Min
(Note 5)
1.238
1.225
Typ
(Note 4)
1.250
1.250
Max
(Note 5)
1.262
1.270
Units
V
V
V
OUT
Output Voltage
1.782
1.746
2.475
2.450
2.820
2.790
2.790
3.267
3.235
4.950
4.900
1.800
1.800
2.500
2.500
2.850
2.850
2.850
3.300
3.300
5.000
5.000
0.035
1
1
1.818
1.854
2.525
2.550
2.880
2.910
2.910
3.333
3.365
5.050
5.100
0.2
6
6
V
V
V
V
V
V
V
V
V
V
V
%
mV
mV
1
1
1
6
6
10
mV
mV
mV
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