1A L.D.O VOLTAGE REGULATOR
LM1117
SOT-223 PKG
FEATURES
z Output Current up to 1 A
z Low Dropout Voltage (1.2V at 1A Output current)
z Three Terminal Adjustable(ADJ) or Fixed 1.2V, 1.5V,
1.8V, 2.5V, 2.85V, 3.3V, 5.0V
z Line Regulation typically at 0.1% max.
z Load Regulation typically at 0.2% max.
z Internal Current and Terminal Protection
z Maximum Input Voltage 20V
z Surface Mount Package SOT-223, TO-252, SOT-89
z 100% Thermal Limit Burn-In
z Moisture Sensitivity Level 3
TO-252 PKG
SOT-89 PKG
ORDERING INFORMATION
APPLICATION
z
z
z
z
z
z
z
Device
Package
LM1117S-ADJ
LM1117S-X.X
SOT-223 3L
LM1117GS-ADJ
LM1117GS-X.X
LM1117RS-ADJ
LM1117RS-X.X
TO-252 3L
LM1117GRS-ADJ
LM1117GRS-X.X
LM1117F-ADJ
LM1117F-X.X
SOT-89 3L
LM1117GF-ADJ
LM1117GF-X.X
X.X = Output Voltage = 1.2V, 1.5V, 1.8V, 2.5V, 2.85V,
3.3V, 5.0V
Active SCSI Terminators
Portable/ Plan Top/ Notebook Computers
High Efficiency Linear Regulators
SMPS Post Regulators
Mother B/D Clock Supplies
Disk Drives
Battery Chargers
DESCRIPSION
The LM1117 is a low power positive-voltage regulator designed to meet 1A output current and comply with SCSI-II
specifications with a fixed output voltage of 2.85V. This device is an excellent choice for use in battery-powered
applications, as active terminators for the SCSI bus, and portable computers. The LM1117 features very low
quiescent current and very low dropout voltage of 1V at a full load and lower as output current decreases.
LM1117 is available as an adjustable or fixed 1.2V, 1.5V, 1.8V, 2.5V, 2.85, 3.3V, and 5.0V output voltages. The
LM1117 is offered in a 3-pin surface mount package SOT-223, TO-252 & SOT-89. The output capacitor of 10㎌ or
larger is needed for output stability of LM1117 as required by most of the other regulator circuits.
Absolute Maximum Ratings
(TA = 25℃, unless otherwise specified)
CHARACTERISTIC
SYMBOL
MIN.
MAX.
UNIT
VIN
-
20
V
Lead Temperature (Soldering, 5 seconds)
TSOL
-
260
℃
Operating Junction Temperature Range
TOPR
-40
125
℃
Storage Temperature Range
TSTG
-65
150
℃
DC Input Voltage
Mar. 2013 Rev. 1.22
-1-
HTC
1A L.D.O VOLTAGE REGULATOR
LM1117
Ordering Information
VOUT
ADJ
1.2V
1.5V
1.8V
2.5V
2.85V
Package
Order No.
Package Marking
Supplied As
Status
SOT-223
LM1117S-ADJ
1117C ADJ
Reel
Active
SOT-223
LM1117GS-ADJ
1117GC ADJ
Reel
Contact us
TO-252
LM1117RS-ADJ
LM1117C ADJ
Reel
Active
TO-252
LM1117GRS-ADJ
LM1117GC ADJ
Reel
Contact us
SOT-89
LM1117F-ADJ
1117C ADJ
Reel
Active
SOT-89
LM1117GF-ADJ
1117GC ADJ
Reel
Active
SOT-223
LM1117S-1.2V
1117C 1.2
Reel
Active
SOT-223
LM1117GS-1.2V
1117GC 1.2
Reel
Contact us
TO-252
LM1117RS-1.2V
LM1117C 1.2
Reel
Active
TO-252
LM1117GRS-1.2V
LM1117GC 1.2
Reel
Contact us
SOT-89
LM1117F-1.2V
1117C 1.2
Reel
Active
SOT-89
LM1117GF-1.2V
1117GC 1.2
Reel
Active
SOT-223
LM1117S-1.5V
1117C 1.5
Reel
Active
SOT-223
LM1117GS-1.5V
1117GC 1.5
Reel
Contact us
TO-252
LM1117RS-1.5V
LM1117C 1.5
Reel
Active
TO-252
LM1117GRS-1.5V
LM1117GC 1.5
Reel
Contact us
SOT-89
LM1117F-1.5V
1117C 1.5
Reel
Active
SOT-89
LM1117GF-1.5V
1117GC 1.5
Reel
Active
SOT-223
LM1117S-1.8V
1117C 1.8
Reel
Active
SOT-223
LM1117GS-1.8V
1117GC 1.8
Reel
Contact us
TO-252
LM1117RS-1.8V
LM1117C 1.8
Reel
Active
TO-252
LM1117GRS-1.8V
LM1117GC 1.8
Reel
Contact us
SOT-89
LM1117F-1.8V
1117C 1.8
Reel
Active
SOT-89
LM1117GF-1.8V
1117GC 1.8
Reel
Active
SOT-223
LM1117S-2.5V
1117C 2.5
Reel
Active
SOT-223
LM1117GS-2.5V
1117GC 2.5
Reel
Contact us
TO-252
LM1117RS-2.5V
LM1117C 2.5
Reel
Active
TO-252
LM1117GRS-2.5V
LM1117GC 2.5
Reel
Contact us
SOT-89
LM1117F-2.5V
1117C 2.5
Reel
Active
SOT-89
LM1117GF-2.5V
1117GC 2.5
Reel
Active
SOT-223
LM1117S-2.85V
1117C 2.85
Reel
Active
SOT-223
LM1117GS-2.85V
1117GC 2.85
Reel
Contact us
TO-252
LM1117RS-2.85V
LM1117C 2.85
Reel
Active
TO-252
LM1117GRS-2.85V
LM1117GC 2.85
Reel
Contact us
SOT-89
LM1117F-2.85V
1117C 2.85
Reel
Active
SOT-89
LM1117GF-2.85V
1117GC 2.85
Reel
Active
Mar. 2013 Rev. 1.22
-2-
HTC
1A L.D.O VOLTAGE REGULATOR
LM1117
Ordering Information
VOUT
3.3V
5.0V
(Continued)
Package
Order No.
Package Marking
Supplied As
Status
SOT-223
LM1117S-3.3V
1117C 3.3
Reel
Active
SOT-223
LM1117GS-3.3V
1117GC 3.3
Reel
Contact us
TO-252
LM1117RS-3.3V
LM1117C 3.3
Reel
Active
TO-252
LM1117GRS-3.3V
LM1117GC 3.3
Reel
Contact us
SOT-89
LM1117F-3.3V
1117C 3.3
Reel
Active
SOT-89
LM1117GF-3.3V
1117GC 3.3
Reel
Active
SOT-223
LM1117S-5.0V
1117C 5.0
Reel
Active
SOT-223
LM1117GS-5.0V
1117GC 5.0
Reel
Contact us
TO-252
LM1117RS-5.0V
LM1117C 5.0
Reel
Active
TO-252
LM1117GRS-5.0V
LM1117GC 5.0
Reel
Contact us
SOT-89
LM1117F-5.0V
1117C 5.0
Reel
Active
SOT-89
LM1117GF-5.0V
1117GC 5.0
Reel
Active
Mar. 2013 Rev. 1.22
-3-
HTC
1A L.D.O VOLTAGE REGULATOR
LM1117
PIN CONFIGURATION
SOT-223
TO-252
SOT-89
PIN DESCRIPTION
SOT-223 / TO-252 / SOT-89
Pin No.
Name
Function
1
ADJ/GND
Adjustable / Ground
2
VOUT
Output Voltage
3
VIN
Input Voltage
Mar. 2013 Rev. 1.22
-4-
HTC
1A L.D.O VOLTAGE REGULATOR
LM1117
ELECTRICAL CHARACTERISTICS
(TA=25℃, CO = 10uF unless otherwise specified)
For ADJ Output Voltage
Symbol
Parameters
Condition
Min.
Typ.
Max.
Unit
1.250
1.262
V
1.281
V
VREF
Reference Voltage
VIN=5V, IO=10mA
1.238
VREF
Reference Voltage
IO = 10mA to 1A, VIN - VREF = 1.5V to
13.75V (TJ = 0 ~ 125℃)
1.219
ΔVLINE
Line Regulation
IO = 10mA , VIN - VREF = 1.5V to 12V
0.1
0.2
%
ΔVLOAD
Load Regulation
IO = 10mA to 1A, VIN - VREF = 2 V
0.2
0.4
%
12
V
VIN
Operating Input Voltage
IADJ
Adjustment pin Current
VIN - VREF = 1.5V to 12V, IO = 100mA
50
120
uA
ΔIADJ
Adjustment Pin Current
Change
VIN - VREF = 1.5V to 12V,
IO = 100mA to 1A
0.5
5
uA
IO(MIN)
Minimum Load Current
VIN=5V, VREF=0V
5
10
mA
IO
Current Limit
VIN - VREF = 5V
1250
1600
mA
EN
Output Noise(%VO)
B = 10Hz to 10kHz, TJ = 25℃
Supply Voltage Rejection
IO = 1A, f = 120Hz,
VIN - VREF = 3V, VRIPPLE = 1VPP
SVR
1000
%
75
dB
(TA=25℃, CO = 10uF unless otherwise specified)
For 1.2V Output Voltage
Symbol
60
0.003
Parameters
Condition
Min.
Typ.
Max.
Unit
1.200
1.224
V
1.248
V
VO
Output Voltage
VIN = 2.7V, IO = 10mA
1.176
VO
Output Voltage
VIN = 2.7V to 12V, IO = 0mA to 1A
(TJ = 0 ~ 125℃)
1.152
ΔVLINE
Line Regulation
IO = 0mA , VIN = 2.7V to 12V
0.1
0.2
%
ΔVLOAD
Load Regulation
IO = 10mA to 1A, VIN = 3.2V
0.2
0.4
%
12
V
5
10
㎃
1250
1600
㎃
VIN
Operating Input Voltage
ID
Quiescent Current
VIN - VO = 5V
IO
Current Limit
VIN - VO = 5V
EN
Output Noise(%VO)
B = 10Hz to 10kHz, TJ = 25℃
Supply Voltage Rejection
IO = 1A, f = 120Hz,
VIN - VO = 1.5V, VRIPPLE = 1VPP
SVR
Mar. 2013 Rev. 1.22
1000
-5-
60
0.003
%
75
dB
HTC
1A L.D.O VOLTAGE REGULATOR
(TA=25℃, CO = 10uF unless otherwise specified)
For 1.5V Output Voltage
Symbol
LM1117
Parameters
Condition
Min.
Typ.
Max.
Unit
1.5
1.515
V
1.530
V
VO
Output Voltage
VIN = 3.0V , IO = 10mA
1.485
VO
Output Voltage
VIN = 3.0V to 12V, IO = 0mA to 1A
(TJ = 0 ~ 125℃)
1.470
ΔVLINE
Line Regulation
IO = 0mA , VIN = 3.0V to 12V
0.1
0.2
%
ΔVLOAD
Load Regulation
IO = 0mA to 1A, VIN = 3.5 V
0.2
0.4
%
VIN
Operating Input Voltage
IO = 100mA
12
V
ID
Quiescent Current
VIN - VO = 5V
5
10
mA
IO
Current Limit
VIN - VO = 5V
1250
1600
mA
EN
Output Noise(%VO)
B = 10Hz to 10kHz, TJ = 25℃
Supply Voltage Rejection
IO = 1A, f = 120Hz,
VIN - VO = 3V, VRIPPLE = 1VPP
SVR
1000
uV
75
dB
(TA=25℃, CO = 10uF unless otherwise specified)
For 1.8V Output Voltage
Symbol
60
100
Parameters
Condition
Min.
Typ.
Max.
Unit
1.8
1.818
V
1.836
V
VO
Output Voltage
VIN = 3.3V, IO = 10mA
1.782
VO
Output Voltage
VIN = 3.3V to 12V, IO = 0mA to 1A
(TJ = 0 ~ 125℃)
1.764
ΔVLINE
Line Regulation
IO = 0mA , VIN = 3.3V to 12V
0.1
0.2
%
ΔVLOAD
Load Regulation
IO = 0mA to 1A, VIN = 3.8 V
0.2
0.4
%
VIN
Operating Input Voltage
IO = 100mA
12
V
ID
Quiescent Current
VIN - VO = 5V
5
10
mA
IO
Current Limit
VIN - VO = 5V
1250
1600
mA
EN
Output Noise(%VO)
B = 10Hz to 10kHz, TJ = 25℃
Supply Voltage Rejection
IO = 1A, f = 120Hz,
VIN - VO = 3V, VRIPPLE = 1VPP
SVR
Mar. 2013 Rev. 1.22
1000
-6-
60
100
uV
75
dB
HTC
1A L.D.O VOLTAGE REGULATOR
(TA=25℃, CO = 10uF unless otherwise specified)
For 2.5V Output Voltage
Symbol
LM1117
Parameters
Condition
Min.
Typ.
Max.
Unit
2.5
2.525
V
2.550
V
VO
Output Voltage
VIN = 4.0V, IO = 10mA
2.475
VO
Output Voltage
VIN = 4.0V to 12V, IO = 0mA to 1A
(TJ = 0 ~ 125℃)
2.450
ΔVLINE
Line Regulation
IO = 0mA , VIN = 4.0V to 12V
0.1
0.2
%
ΔVLOAD
Load Regulation
IO = 0mA to 1A, VIN = 4.5 V
0.2
0.4
%
VIN
Operating Input Voltage
IO = 100mA
12
V
ID
Quiescent Current
VIN - VO = 5V
5
10
mA
IO
Current Limit
VIN - VO = 5V
1250
1600
mA
EN
Output Noise(%VO)
B = 10Hz to 10kHz, TJ = 25℃
Supply Voltage Rejection
IO = 1A, f = 120Hz,
VIN - VO = 3V, VRIPPLE = 1VPP
SVR
1000
uV
75
dB
(TA=25℃, CO = 10uF unless otherwise specified)
For 2.85V Output Voltage
Symbol
60
100
Parameters
Condition
Min.
Typ.
Max.
Unit
2.85
2.878
V
2.907
V
VO
Output Voltage
VIN = 4.4V, IO = 10mA
2.821
VO
Output Voltage
VIN = 4.4V to 12V, IO = 0mA to 1A
(TJ = 0 ~ 125℃)
2.793
ΔVLINE
Line Regulation
IO = 0mA , VIN = 4.4 to 12V
0.1
0.2
%
ΔVLOAD
Load Regulation
IO = 0mA to 1A, VIN = 4.85 V
0.2
0.4
%
VIN
Operating Input Voltage
IO = 100mA
12
V
ID
Quiescent Current
VIN - VO = 5V
5
10
mA
IO
Current Limit
VIN - VO = 5V
1250
1600
mA
EN
Output Noise(%VO)
B = 10Hz to 10kHz, TJ = 25℃
Supply Voltage Rejection
IO = 1A, f = 120Hz,
VIN - VO = 3V, VRIPPLE = 1VPP
SVR
Mar. 2013 Rev. 1.22
1000
-7-
60
100
uV
75
dB
HTC
1A L.D.O VOLTAGE REGULATOR
(TA=25℃, CO = 10uF unless otherwise specified)
For 3.3V Output Voltage
Symbol
LM1117
Parameters
Condition
Min.
Typ.
Max.
Unit
3.3
3.333
V
3.366
V
VO
Output Voltage
VIN = 4.8V, IO = 10mA
3.267
VO
Output Voltage
VIN = 4.8V to 12V, IO = 0mA to 1A
(TJ = 0 ~ 125℃)
3.234
ΔVLINE
Line Regulation
IO = 0mA , VIN = 4.8V to 12V
0.1
0.2
%
ΔVLOAD
Load Regulation
IO = 0mA to 1A, VIN = 5.3 V
0.2
0.4
%
VIN
Operating Input Voltage
IO = 100mA
12
V
ID
Quiescent Current
VIN - VO = 5V
5
10
mA
IO
Current Limit
VIN - VO = 5V
1250
1600
mA
EN
Output Noise(%VO)
B = 10Hz to 10kHz, TJ = 25℃
Supply Voltage Rejection
IO = 1A, f = 120Hz,
VIN - VO = 3V, VRIPPLE = 1VPP
SVR
1000
uV
75
dB
(TA=25℃, CO = 10uF unless otherwise specified)
For 5.0V Output Voltage
Symbol
60
100
Parameters
Condition
Min.
Typ.
Max.
Unit
5.0
5.050
V
5.100
V
VO
Output Voltage
VIN = 6.5V, IO = 10mA
4.950
VO
Output Voltage
VIN = 6.5V to 15V, IO = 0mA to 1A
(TJ = 0 ~ 125℃)
4.900
ΔVLINE
Line Regulation
IO = 0mA , VIN = 6.5V to 15V
0.1
0.2
%
ΔVLOAD
Load Regulation
IO = 0mA to 1A, VIN = 7.0 V
0.2
0.4
%
VIN
Operating Input Voltage
IO = 100mA
12
V
ID
Quiescent Current
VIN - VO = 5V
5
10
mA
IO
Current Limit
VIN - VO = 5V
1250
1600
mA
EN
Output Noise(%VO)
B = 10Hz to 10kHz, TJ = 25℃
Supply Voltage Rejection
IO = 1A, f = 120Hz,
VIN - VO = 3V, VRIPPLE = 1VPP
SVR
Mar. 2013 Rev. 1.22
1000
-8-
60
100
uV
75
dB
HTC
1A L.D.O VOLTAGE REGULATOR
(TA=25℃, CO = 10uF unless otherwise specified)
For All Output Voltage
Symbol
VD
Parameters
Dropout Voltage
LM1117
Condition
Typ.
Max.
Unit
IO = 100mA
1.0
1.1
V
IO = 500mA
1.1
1.2
V
IO = 1A
1.2
1.3
V
Temperature Stability
Long Term Stability
1000 hrs, TJ = 125℃
Thermal Regulation
TA = 25℃ 30ms Pulse
Min.
0.5
%
0.3
%
0.003
%/W
TYPICAL APPLICATION CIRCUIT
Fig.1 1A Current Output
Fig.2 Typical Adjustable Regulator
Mar. 2013 Rev. 1.22
-9-
HTC
1A L.D.O VOLTAGE REGULATOR
LM1117
Fig.3 Negative Supply
Fig.4 Active Terminator for SCSI-2BUS
Fig.5 Voltage Regulator with Reference
Fig.6 Battery Backed-up Regulated Supply
Mar. 2013 Rev. 1.22
- 10 -
HTC
1A L.D.O VOLTAGE REGULATOR
LM1117
TYPICAL OPERATING CHARACTERISTICS
Fig.8 DROPOUT VOLTAGE VS OUTPUT CURRENT
Fig.7 OUTPUT VOLTAGE CHANGE VS TEMPERATURE
Fig.10 OUTPUT SHORT CIRCUIT CURRENT VS
TEMPERATURE
IQ, QUIESCENT CURRENT CHANGE (%)
Fig.9 OUTPUT SHORT CIRCUIT CURRENT VS
DIFFERENTIAL VOLTAGE
Fig.12 QUIESCENT CURRENT CHANGE VS TEMPERATURE
Fig.11 ADJ PIN CURRENT VS TEMPERATURE
Mar. 2013 Rev. 1.22
- 11 -
HTC
1A L.D.O VOLTAGE REGULATOR
LM1117
APPLICATION INFORMATION
Maximum Output Current Capability
The LM1117 can deliver a continuous current of 1A over the full operating junction temperature range. However,
the output current is limited by the restriction of power dissipation which differs from packages. A heat sink may
be required depending on the maximum power dissipation and maximum ambient temperature of application.
With respect to the applied package, the maximum output current of 1A may be still undeliverable due to the
restriction of the power dissipation of LM1117. Under all possible conditions, the junction temperature must be
within the range specified under operating conditions. The temperatures over the device are given by:
TC = TA + PD X θCA / TJ = TC + PD X θJC / TJ = TA + PD X θJA
where TJ is the junction temperature, TC is the case temperature, TA is the ambient temperature, PD is the total
power dissipation of the device, θCA is the thermal resistance of case-to-ambient, θJC is the thermal resistance of
junction-to-case, and θJA is the thermal resistance of junction to ambient. The total power dissipation of the
device is given by:
PD = PIN – POUT = (VIN X IIN)–(VOUT X IOUT)
= (VIN X (IOUT+IGND)) – (VOUT X IOUT) = (VIN - VOUT) X IOUT + VIN X IGND
where IGND is the operating ground current of the device which is specified at the Electrical Characteristics. The
maximum allowable temperature rise (TRmax) depends on the maximum ambient temperature (TAmax) of the
application, and the maximum allowable junction temperature (TJmax):
TRmax = TJmax – TAmax
The maximum allowable value for junction-to-ambient thermal resistance, θJA, can be calculated using the
formula:
θJA = TRmax / PD = (TJmax – TAmax) / PD
LM1117 is available in SOT223, TO252 and SOT89 packages. The thermal resistance depends on amount of
copper area or heat sink, and on air flow. If the maximum allowable value of θJA calculated above is over
137°C/W for SOT-223 package, over 105 °C/W for TO252 package, over 315 °C/W for SOT-89 package, no
heat sink is needed since the package can dissipate enough heat to satisfy these requirements. If the value for
allowable θJA falls near or below these limits, a heat sink or proper area of copper plane is required. In summary,
the absolute maximum ratings of thermal resistances are as follow:
Absolute Maximum Ratings of Thermal Resistance
Characteristic
Symbol
Rating
Unit
Thermal Resistance Junction-To-Ambient / SOT-223
θJA-SOT-223
137
°C/W
Thermal Resistance Junction-To-Ambient / TO-252
θJA-TO-252
105
°C/W
Thermal Resistance Junction-To-Ambient / SOT-89
θJA-SOT-89
315
°C/W
No heat sink / No air flow / No adjacent heat source / 0.066 inch2 copper area. (TA=25°C)
Mar. 2013 Rev. 1.22
- 12 -
HTC
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