1A L.D.

O VOLTAGE REGULATOR LM1117

FEATURES
SOT-223 PKG
 Output Current up to 1.0A
 Low Dropout Voltage (1.2V at 1.0A Output current)
 Three Terminal Adjustable(ADJ) or Fixed 1.2V, 1.5V,
1.8V, 2.5V, 3.3V, and 5.0V
 Line Regulation typically at 0.1% typ. TO-252 PKG
 Load Regulation typically at 0.2% typ.
 Internal Current and Thermal Protection
 Maximum Input Voltage 20V
 Surface Mount Package SOT-223, TO-252, and SOT-89
 Moisture Sensitivity Level 3
SOT-89 PKG

APPLICATIONS
 Active SCSI Terminators
 Portable/ Plan Top/ Notebook Computers ORDERING INFORMATION
 High Efficiency Linear Regulators Device Package
 SMPS Post Regulators LM1117S-ADJ
SOT-223 3L
 Mother B/D Clock Supplies LM1117S-x.x
LM1117RS-ADJ
 Disk Drives LM1117RS-x.x
TO-252 3L
 Battery Chargers LM1117F-ADJ
SOT-89 3L
LM1117F-x.x
x.x: Output Voltage = 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, and 5.0V

DESCRIPTION
The LM1117 is a low power positive-voltage regulator designed to meet 1A output current. 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 1.2V 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, 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 10µF or larger is needed for output stability of LM1117 as required by most of the other
regulator circuits.

ABSOLUTE MAXIMUM RATINGS

CHARACTERISTIC SYMBOL MIN. MAX. UNIT

Input Supply Voltage VIN - 20 V

Lead Temperature TSOL - 260 °C

Storage Temperature Range TSTG −65 150 °C

Operating Junction Temperature Range TOPR −40 125 °C

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ORDERING INFORMATION

VOUT Package Order No. Package Marking Supplied As Status

SOT-223 LM1117S-ADJ 1117C ADJ Tape & Reel Active

ADJ TO-252 LM1117RS-ADJ LM1117C ADJ Tape & Reel Active

SOT-89 LM1117F-ADJ 1117C ADJ Tape & Reel Active

SOT-223 LM1117S-1.2 1117C 1.2 Tape & Reel Active

1.2V TO-252 LM1117RS-1.2 LM1117C 1.2 Tape & Reel Active

SOT-89 LM1117F-1.2 1117C 1.2 Tape & Reel Active

SOT-223 LM1117S-1.5 1117C 1.5 Tape & Reel Active

1.5V TO-252 LM1117RS-1.5 LM1117C 1.5 Tape & Reel Active

SOT-89 LM1117F-1.5 1117C 1.5 Tape & Reel Active

SOT-223 LM1117S-1.8 1117C 1.8 Tape & Reel Active

1.8V TO-252 LM1117RS-1.8 LM1117C 1.8 Tape & Reel Active

SOT-89 LM1117F-1.8 1117C 1.8 Tape & Reel Active

SOT-223 LM1117S-2.5 1117C 2.5 Tape & Reel Active

2.5V TO-252 LM1117RS-2.5 LM1117C 2.5 Tape & Reel Active

SOT-89 LM1117F-2.5 1117C 2.5 Tape & Reel Active

SOT-223 LM1117S-3.3 1117C 3.3 Tape & Reel Active

3.3V TO-252 LM1117RS-3.3 LM1117C 3.3 Tape & Reel Active

SOT-89 LM1117F-3.3 1117C 3.3 Tape & Reel Active

SOT-223 LM1117S-5.0 1117C 5.0 Tape & Reel Active

5.0V TO-252 LM1117RS-5.0 LM1117C 5.0 Tape & Reel Active

SOT-89 LM1117F-5.0 1117C 5.0 Tape & Reel Active

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PIN CONFIGURATIONS

SOT-223 TO-252 SOT-89

PIN DESCRIPTION

Pin No.
Pin Name Pin Function
SOT-223 TO-252 SOT-89

1 1 1 ADJ / GND Adjustable or Ground (Fixed Version)

2 2 2 VOUT Output Voltage

3 3 3 VIN Input Voltage

TYPICAL APPLICATION CIRCUITS

< Fixed Version> <Adjustable Version>

Vin VIN OUT Vout Vin VIN OUT Vout

GND ADJ R1

CIN COUT CIN COUT

10µF 10µF 10µF 10µF
R2

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ELECTRICAL CHARACTERISTICS

For ADJ Output Voltage (TJ=25°C, COUT = 10µF unless otherwise specified)

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

VREF Reference Voltage VIN = 5V, IO = 10mA 1.238 1.250 1.262 V

IO = 10mA to 1A, VIN - VREF = 1.5V to

VREF Reference Voltage 1.219 1.281 V
13.75V (TJ = -40 ~ 125°C)
ΔVLINE Line Regulation IO = 10mA , VIN - VREF = 1.5V to 12V 0.1 0.2 %

ΔVLOAD Load Regulation IO = 10mA to 1A, VIN - VREF = 2V 0.2 0.4 %

VIN Operating Input Voltage 12 V

IADJ Adjustment pin Current VIN - VREF = 1.5V to 12V, IO = 100mA 50 120 µA

Adjustment Pin Current VIN - VREF = 1.5V to 12V,

ΔIADJ 0.5 5 µA
Change IO = 100mA to 1A
IO(MIN) Minimum Load Current VIN = 5V, VREF = 0V 2 7 mA

VIN = VO +1.5V
IGND Ground Pin Current 5 10 mA
IO =10 mA to 1A
IO Current Limit VIN - VREF = 5V 1000 mA

eN Output Noise (%VO) B = 10Hz to 10kHz, TJ = 25°C 0.003 %

IO = 1A, f = 120Hz,
SVR Supply Voltage Rejection 60 75 dB
VIN - VREF = 3V, VRIPPLE = 1VPP

For 1.2V Output Voltage (TJ=25°C, COUT = 10µF unless otherwise specified)

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

VO Output Voltage VIN = 2.7V, IO = 10mA 1.176 1.200 1.224 V

VIN = 2.7V to 12V, IO = 0mA to 1A

VO Output Voltage 1.152 1.248 V
(TJ = -40 ~ 125°C)

ΔVLINE Line Regulation IO = 10mA , VIN = 2.7V to 12V 0.1 0.2 %

ΔVLOAD Load Regulation IO = 10mA to 1A, VIN = 3.2V 0.2 0.4 %

VIN Operating Input Voltage 12 V

VIN = VO +1.5V
IGND Ground Pin Current 5 10 mA
IO =10 mA to 1A

IO Current Limit VIN - VO = 5V 1000 mA

eN Output Noise (%VO) B = 10Hz to 10kHz, TJ = 25°C 0.003 %

IO = 1A, f = 120Hz,
SVR Supply Voltage Rejection 60 75 dB
VIN - VO = 1.5V, VRIPPLE = 1VPP

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For 1.5V Output Voltage (TJ=25°C, COUT = 10µF unless otherwise specified)

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

VO Output Voltage VIN = 3.0V, IO = 10mA 1.485 1.5 1.515 V

VIN = 3.0V to 12V, IO = 0mA to 1A

VO Output Voltage 1.470 1.530 V
(TJ = -40 ~ 125°C)

ΔVLINE Line Regulation IO = 10mA , VIN = 3.0V to 12V 0.1 0.2 %

ΔVLOAD Load Regulation IO = 10mA to 1A, VIN = 3.5V 0.2 0.4 %

VIN Operating Input Voltage 12 V

VIN = VO +1.5V
IGND Ground Pin Current 5 10 mA
IO =10 mA to 1A

IO Current Limit VIN - VO = 5V 1000 mA

eN Output Noise(%VO) B = 10Hz to 10kHz, TJ = 25°C 100 µV

IO = 1A, f = 120Hz,
SVR Supply Voltage Rejection 60 75 dB
VIN - VO = 3V, VRIPPLE = 1VPP

For 1.8V Output Voltage (TJ=25°C, COUT = 10µF unless otherwise specified)

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

VO Output Voltage VIN = 3.3V, IO = 10mA 1.782 1.8 1.818 V

VIN = 3.3V to 12V, IO = 0mA to 1A

VO Output Voltage 1.764 1.836 V
(TJ = -40 ~ 125°C)

ΔVLINE Line Regulation IO = 10mA , VIN = 3.3V to 12V 0.1 0.2 %

ΔVLOAD Load Regulation IO = 10mA to 1A, VIN = 3.8V 0.2 0.4 %

VIN Operating Input Voltage 12 V

VIN = VO +1.5V
IGND Ground Pin Current 5 10 mA
IO =10 mA to 1A

IO Current Limit VIN - VO = 5V 1000 mA

eN Output Noise(%VO) B = 10Hz to 10kHz, TJ = 25°C 100 µV

IO = 1A, f = 120Hz,
SVR Supply Voltage Rejection 60 75 dB
VIN - VO = 3V, VRIPPLE = 1VPP

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For 2.5V Output Voltage (TJ=25°C, COUT = 10µF unless otherwise specified)

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

VO Output Voltage VIN = 4.0V, IO = 10mA 2.475 2.5 2.525 V

VIN = 4.0V to 12V, IO = 0mA to 1A

VO Output Voltage 2.450 2.550 V
(TJ = -40 ~ 125°C)

ΔVLINE Line Regulation IO = 10mA , VIN = 4.0V to 12V 0.1 0.2 %

ΔVLOAD Load Regulation IO = 10mA to 1A, VIN = 4.5V 0.2 0.4 %

VIN Operating Input Voltage 12 V

VIN = VO +1.5V
IGND Ground Pin Current 5 10 mA
IO =10 mA to 1A

IO Current Limit VIN - VO = 5V 1000 mA

eN Output Noise(%VO) B = 10Hz to 10kHz, TJ = 25°C 100 µV

IO = 1A, f = 120Hz,
SVR Supply Voltage Rejection 60 75 dB
VIN - VO = 3V, VRIPPLE = 1VPP

For 3.3V Output Voltage (TJ=25°C, COUT = 10µF unless otherwise specified)

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

VO Output Voltage VIN = 4.8V, IO = 10mA 3.267 3.3 3.333 V

VIN = 4.8V to 12V, IO = 0mA to 1A

VO Output Voltage 3.234 3.366 V
(TJ = -40 ~ 125°C)

ΔVLINE Line Regulation IO = 10mA , VIN = 4.8V to 12V 0.1 0.2 %

ΔVLOAD Load Regulation IO = 10mA to 1A, VIN = 5.3V 0.2 0.4 %

VIN Operating Input Voltage 12 V

VIN = VO +1.5V
IGND Ground Pin Current 5 10 mA
IO =10 mA to 1A

IO Current Limit VIN - VO = 5V 1000 mA

eN Output Noise(%VO) B = 10Hz to 10kHz, TJ = 25°C 100 µV

IO = 1A, f = 120Hz,
SVR Supply Voltage Rejection 60 75 dB
VIN - VO = 3V, VRIPPLE = 1VPP

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For 5.0V Output Voltage (TJ=25°C, COUT = 10µF unless otherwise specified)

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

VO Output Voltage VIN = 6.5V, IO = 10mA 4.950 5.0 5.050 V

VIN = 6.5V to 15V, IO = 0mA to 1A

VO Output Voltage 4.900 5.100 V
(TJ = -40 ~ 125°C)

ΔVLINE Line Regulation IO = 10mA , VIN = 6.5V to 15V 0.1 0.2 %

ΔVLOAD Load Regulation IO = 10mA to 1A, VIN = 7.0V 0.2 0.4 %

VIN Operating Input Voltage 15 V

VIN = VO +1.5V
IGND Ground Pin Current 5 10 mA
IO =10 mA to 1A

IO Current Limit VIN - VO = 5V 1000 mA

eN Output Noise(%VO) B = 10Hz to 10kHz, TJ = 25°C 100 µV

IO = 1A, f = 120Hz,
SVR Supply Voltage Rejection 60 75 dB
VIN - VO = 3V, VRIPPLE = 1VPP

For All Output Voltage (TJ=25°C, COUT = 10µF unless otherwise specified)

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

IO = 100mA 1.0 1.1 V

VD Dropout Voltage IO = 500mA 1.1 1.2 V

IO = 1A 1.2 1.3 V

Temperature Stability 0.5 %

Long Term Stability 1000 hrs, TJ = 125°C 0.3 %

Thermal Regulation TA = 25°C 30ms Pulse 0.003 %/W

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TYPICAL OPERATING CHARACTERISTICS

2.0 1.6
VIN = VOUT + 3.0V
IOUT = 10mA

VIN – VOUT, DROPOUT VOLTAGE (V)

1.5 1.4
OUTPUT VOLTAGE CHANGE(%)

1.0 1.2 TJ = -40℃

ADJ, 1.5V, 1.8V, 2.5V
0.5 1.0
TJ = 25℃
0 0.8 TJ = 125℃
5.0V
-0.5 0.6

-1.0 0.4

-1.5 0.2

-2.0 0
-50 -25 0 25 50 75 100 125 150 0 100 200 300 400 500 600 800 1000

FREE-AIR TEMPERATURE-℃ IOUT, OUTPUT CURRENT(mA)

OUTPUT VOLTAGE CHANGE VS TEMPERATURE DROPOUT VOLTAGE VS OUTPUT CURRENT

90 20
IQ, QUIESCENT CURRENT CHANGE (%)

80 15
IADJ, ADJUST PIN CURRENT

70 10

60 5
IOUT = 10mA
50 0

40 -5

30 -10

20 -15

10 -20
-50 -25 0 25 50 75 100 125 150 -50 -25 0 25 50 75 100 125 150

TA - AMBIENT TEMPERATURE (℃) TA - AMBIENT TEMPERATURE (℃)

ADJ PIN CURRENT VS TEMPERATURE QUIESCENT CURRENT CHANGE VS TEMPERATURE

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APPLICATION CIRCUITS

Fig.1 300mA Current Output

Fig.2 Typical Adjustable Regulator

VIN IN OUT
LM1117-5.0
+ +

10uF GND 100uF

Floating Input VOUT = -5V

Fig.3 Negative Supply

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Fig.4 Voltage Regulator with Reference

Fig.5 Battery Backed-up Regulated Supply

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1A L.D.O VOLTAGE REGULATOR LM1117
APPLICATION INFORMATION

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 × θCA / TJ = TC + PD × θJC / TJ = TA + PD × 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 × IIN) − (VOUT × IOUT)

= (VIN × (IOUT + IGND)) − (VOUT × IOUT) = (VIN − VOUT) × IOUT + (VIN × IGND)

where IGND is the operating ground current of the device which is specified at the Electrical Characteristics. The
maximum allowable temperature rise (T Rmax) depends on the maximum ambient temperature (T Amax) of the
application, and the maximum allowable junction temperature (T Jmax):

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 TO-252 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 θ JA
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:

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 / TA=25°C

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REVISION NOTICE

The description in this data sheet is subject to change without any notice to describe its electrical characteristics
properly.

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