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LM1117/LM1117I 800mA Low-Dropout Linear Regulator
December 2000
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 SOT-223, TO-220, and
TO-252 D-PAK packages. A minimum of 10µF tantalum ca-
pacitor 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 Package
n
Current Limiting and Thermal Protection
n
Output Current
800mA
n
Temperature Range
— LM1117
0˚C to 125˚C
— LM1117I
−40˚C to 125˚C
n
Line Regulation
0.2% (Max)
n
Load Regulation
0.4% (Max)
Applications
n
2.85V Model for SCSI-2 Active Termination
n
Post Regulator for Switching DC/DC Converter
n
High Efficiency Linear Regulators
n
Battery Charger
n
Battery Powered Instrumentation
Typical Application
Active Terminator for SCSI-2 Bus
DS100919-5
Fixed Output Regulator
DS100919-28
© 2000 National Semiconductor Corporation
DS100919
www.national.com
Ordering Information
Package
Temperature
Range
Part Number
Packaging Marking
Transport Media
NSC
Drawing
3-lead
SOT-223
0˚C to +125˚C
LM1117MPX-ADJ
N03A
Tape and Reel
MA04A
LM1117MPX-1.8
N12A
Tape and Reel
LM1117MPX-2.5
N13A
Tape and Reel
LM1117MPX-2.85
N04A
Tape and Reel
LM1117MPX-3.3
N05A
Tape and Reel
LM1117MPX-5.0
N06A
Tape and Reel
−40˚C to +125˚C
LM1117IMPX-ADJ
N03B
Tape and Reel
LM1117IMPX-5.0
N06B
Tape and Reel
3-lead TO-220
0˚C to +125˚C
LM1117T-ADJ
LM1117T-ADJ
Rails
T03B
LM1117T-2.85
LM1117T-2.85
Rails
LM1117T-3.3
LM1117T-3.3
Rails
LM1117T-5.0
LM1117T-5.0
Rails
3-lead TO-252
0˚C to +125˚C
LM1117DTX-ADJ
LM1117DT-ADJ
Tape and Reel
TD03B
LM1117DTX-1.8
LM1117DT-1.8
Tape and Reel
LM1117DTX-2.5
LM1117DT-2.5
Tape and Reel
LM1117DTX-2.85
LM1117DT-2.85
Tape and Reel
LM1117DTX-3.3
LM1117DT-3.3
Tape and Reel
LM1117DTX-5.0
LM1117DT-5.0
Tape and Reel
−40˚C to +125˚C
LM1117IDTX-ADJ
LM1117IDT-ADJ
Tape and Reel
LM1117IDTX-5.0
LM1117IDT-5.0
Tape and Reel
Block Diagram
DS100919-1
www.national.com
2
Connection Diagrams
SOT-223
DS100919-4
Top View
TO-220
DS100919-2
Top View
TO-252
DS100919-38
Top View
3
www.national.com
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
SOT-223 (IMP) Package
260˚C, 4 sec
ESD Tolerance (Note 3)
2000V
Operating Ratings
(Note 1)
Maximum Input Voltage (V
IN
to GND)
LM1117-ADJ, LM1117-1.8,
LM1117-2.5, LM1117-3.3,
LM1117-5.0, LM1117I-ADJ,
LM1117I-5.0
20V
Input Voltage (V
IN
to GND)
LM1117-ADJ, LM1117-1.8,
LM1117-2.5, LM1117-3.3,
LM1117-5.0, LM1117I-ADJ,
LM1117I-5.0
15V
Power Dissipation (Note 2)
Internally Limited
LM1117-2.85
10V
Junction Temperature (T
J
)
(Note 2)
150˚C
Junction Temperature Range (T
J
)(Note 2)
LM1117
0˚C to 125˚C
Storage Temperature Range
-65˚C to 150˚C
LM1117I
−40˚C to 125˚C
Lead Temperature
TO-220 (T) Package
260˚C, 10 sec
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
Parameter
Conditions
Min
(Note 5)
Typ
(Note 4)
Max
(Note 5)
Units
V
REF
Reference Voltage
LM1117-ADJ
I
OUT
= 10mA, V
IN
-V
OUT
= 2V, T
J
= 25˚C
10mA
£
I
OUT
£
800mA, 1.4V
£
V
IN
-V
OUT
1.238
1.225
1.250
1.250
1.262
1.270
V
V
£
10V
V
OUT
Output Voltage
LM1117-1.8
I
OUT
= 10mA, V
IN
= 3.8V, T
J
= 25˚C
0
£
I
OUT
£
800mA, 3.2V
£
V
IN
£
10V
1.782
1.746
1.800
1.800
1.818
1.854
V
V
LM1117-2.5
I
OUT
= 10mA, V
IN
= 4.5V, T
J
= 25˚C
0
£
I
OUT
£
800mA, 3.9V
£
V
IN
£
10V
2.475
2.450
2.500
2.500
2.525
2.550
V
V
LM1117-2.85
I
OUT
= 10mA, V
IN
= 4.85V, T
J
= 25˚C
0
£
I
OUT
£
800mA, 4.25V
£
V
IN
£
10V
2.820
2.790
2.790
2.850
2.850
2.850
2.880
2.910
2.910
V
V
V
0
£
I
OUT
£
500mA, V
IN
= 4.10V
LM1117-3.3
I
OUT
= 10mA, V
IN
=5VT
J
= 25˚C
0
£
I
OUT
£
800mA, 4.75V
£
V
IN
£
10V
3.267
3.235
3.300
3.300
3.333
3.365
V
V
LM1117-5.0
I
OUT
= 10mA, V
IN
= 7V, T
J
= 25˚C
0
£
I
OUT
£
800mA, 6.5V
£
V
IN
£
12V
4.950
4.900
5.000
5.000
5.050
5.100
V
V
D
V
OUT
Line Regulation
(Note 6)
LM1117-ADJ
I
OUT
= 10mA, 1.5V
£
V
IN
-V
OUT
£
0.035
0.2
%
13.75V
LM1117-1.8
I
OUT
= 0mA, 3.2V
1
6
mV
£
V
IN
£
10V
LM1117-2.5
I
OUT
= 0mA, 3.9V
1
6
mV
£
V
IN
£
10V
LM1117-2.85
I
OUT
= 0mA, 4.25V
£
V
IN
£
10V
1
6
mV
LM1117-3.3
I
OUT
= 0mA, 4.75V
£
V
IN
£
15V
1
6
mV
LM1117-5.0
I
OUT
= 0mA, 6.5V
£
V
IN
£
15V
1
10
mV
www.national.com
4
LM1117 Electrical Characteristics
(Continued)
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
Parameter
Conditions
Min
(Note 5)
Typ
(Note 4)
Max
(Note 5)
Units
D
V
OUT
Load Regulation
(Note 6)
LM1117-ADJ
V
IN
-V
OUT
= 3V, 10
£
I
OUT
£
800mA
0.2
0.4
%
LM1117-1.8
V
IN
= 3.2V, 0
1
10
mV
£
I
OUT
£
800mA
LM1117-2.5
V
IN
= 3.9V, 0
1
10
mV
£
I
OUT
£
800mA
LM1117-2.85
V
IN
= 4.25V, 0
£
I
OUT
£
800mA
1
10
mV
LM1117-3.3
V
IN
= 4.75V, 0
£
I
OUT
£
800mA
1
10
mV
LM1117-5.0
V
IN
= 6.5V, 0
£
I
OUT
£
800mA
1
15
mV
V
IN
-V
OUT
Dropout Voltage
(Note 7)
I
OUT
= 100mA
1.10
1.20
V
I
OUT
= 500mA
1.15
1.25
V
I
OUT
= 800mA
1.20
1.30
V
I
LIMIT
Current Limit
V
IN
-V
OUT
= 5V, T
J
= 25˚C
800
1200
1500
mA
Minimum Load
Current (Note 8)
LM1117-ADJ
V
IN
= 15V
1.7
5
mA
Quiescent Current
LM1117-1.8
V
IN
5
10
mA
£
15V
LM1117-2.5
V
IN
5
10
mA
£
15V
LM1117-2.85
V
IN
£
10V
5
10
mA
LM1117-3.3
V
IN
£
15V
5
10
mA
LM1117-5.0
V
IN
£
15V
5
10
mA
Thermal Regulation
T
A
= 25˚C, 30ms Pulse
0.01
0.1
%/W
Ripple Regulation
f
RIPPLE
=1 20Hz, V
IN
-V
OUT
=3V
V
RIPPLE
=1V
PP
60
75
dB
Adjust Pin Current
60
120
µA
Adjust Pin Current
Change
10
£
I
OUT
£
800mA,
1.4V
£
V
IN
-V
OUT
£
10V
0.2
5
µA
Temperature Stability
0.5
%
Long Term Stability
T
A
= 125˚C, 1000Hrs
0.3
%
RMS Output Noise
(% of V
OUT
), 10Hz
£
f
£
10kHz
0.003
%
Thermal Resistance
Junction-to-Case
3-Lead SOT-223
3-Lead TO-220
3-Lead TO-252
15.0
3.0
10
˚C/W
˚C/W
˚C/W
Thermal Resistance
Junction-to-Ambient
(No heat sink;
No air flow)
3-Lead SOT-223
3-Lead TO-220
3-Lead TO-252 (Note 9)
136
79
92
˚C/W
˚C/W
˚C/W
5
www.national.com
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