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1A LOWDROP OUT VOLTAGE REGULATOR (ADJUSTABLE & FIXED)
FEATURES

LM1117

SOT-223 PKG (FRONT VIEW)

● Output Current up to 1 A
● Low Dropout Voltage ( 700mV at 1A Output Current )

● Three Terminal Adjustable or Fixed 1.5V, 1.8V, 2.5V, 2.85V,
3.0V, 3.3V, 5.0V
● 2.85V Device for SCSI-II Active Terminator

1

● 0.04% Line Regulaion, 0.1% Load Regulation

●
●
●
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●

Very LowQuiescent Current
Internal Current andTerminal Limit
Logic-Controlled Electronics Shutdown
Surface Mount Package SOT-223 & TO-263 (D2-Pack)
100% Thermal Limit Burn-In

2

PIN FUNCTION
1. Adj/Gnd
2. Vout
3. Vin

3

TO-263 (D2 PKG, FRONT VIEW)

PIN FUNCTION
1. Adj/Gnd
2. Vout
3. Vin

APPLICATION
● Active SCSI Terminators
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Portable/Plan Top/Notebook ComputersHigh Efficiency Linear Regulators
SMPS Post Regulators
Mother B/D Clock Supplies
Disk Drives
Battery Chargers

1

2

3

ORDERING INFORMATION

Device (Marking)
Package
LM1117S
SOT-223
LM1117S-XX
LM1117T
TO-263 (D2)
LM1117T-XX
(X=Output Voltage=1.5V, 1.8V, 2.5V, 2.85V,
'3.0V, 3.3V, 5.0V, Adjustable=AD)

DESCRIPTION

The LM1117 is a low power positive-voltage regulatordesigned 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 700mV at a full load
and
lower as output current decreases. LM1117is available as an adjustable or fixed 1.5V, 1.8V, 2.5V, 2.85V,
3.0V, 3.3V, and 5.0V output voltages.
The LM1117 is offered in a 3-pin surface mount package SOT-223 & TO-263. 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
CHARACTERISTIC
DC Input Voltage
Lead Temperature(Soldering, 5 Seconds)
Storage Temperature Range

SYMBOL
VIN
TSOL
TSTG
TOPR

Operating Junction Temperature Range

MIN.

-65

MAX.
7
260
150

UNIT
V
℃
℃

0

125

℃

HTC
1

1A LOWDROP OUT VOLTAGE REGULATOR (FIXED & ADJUSTABLE)

LM1117

THERMAL DATA
PARAMETER
Thermal Resistance Junction-Case

SYMBOL
RTHJ-CASE

SOT-223
15

TO-263
3

UNIT
℃

TYPICALAPPLICATION

V IN

LM1117
100㎌

10㎌

ELECTRICAL CHARACTERISTICS FOR LM1117

S/T-AD(ADJUSTABLE)

(Refer to the test circuits, TJ=0 to 125℃ CO=10㎌ unless otherwise specified)
PARAMETER
Reference Voltage

SYMBOL
VREF

MIN.

TYP.

MAX.

UNIT

VIN - VO = 2V, I O = 100㎃, T J = 25℃

TEST CONDITION

1.238

1.25

1.262

V

1.230

Reference Voltage

VREF

IO = 10 to1A, V IN - VO = 1.4 to 10V

Line Regulation

ΔVO

VIN - VO = 1.5 to 13.75V, I O = 10㎃

Load Regulation

ΔVO

VIN - VO = 3V, I O = 10mA to 1A

Temperature Stability
Long Term Stability
Operating Input Voltage
Adjustment Pin Current
Adjustment Pin Current
Change
Minimum Load Current
Output Current
Output Noise (%VO)

ΔVO

Supply Voltage Rejection

ΔVO
VIN
IADJ

1.270V

0.035

0.2

%

0.1

0.4

0.5
1000 hrs, T J = 125℃

%
%
%

0.3
7

VIN ≤ 15V, I Load =10㎃

50

120

V
㎂

ΔIADJ

VIN - VO = 1.4 to 10V, I O = 10mA to 1A

1

5

㎂

IO(MIN)

VIN = 15V

1.7

5

㎃

950

1200

㎃

IO

VIN - VO = 5V, T J=25℃

EN

B = 10㎐ to 10㎑, T J = 25℃

SVR

IO = 40㎃ , f = 120㎐, T J = 25℃
VIN - V O = 3V, V NIPPLE =1V PP

800

0.003
60

%

75

㏈

IO = 100㎃ , V IN=VOUT+ 0.8V

Thermal Regulation

VD

1.1

V

IO = 500㎃ , V IN=VOUT+ 0.8V

1.00

1.15

V

IO = 1A , V IN=VOUT+ 0.8V

Dropout Voltage

1
1.0

1.3

V

TA = 25℃ 30㎳ Pulse

0.003

%/W

HTC
2

1A LOWDROP OUT VOLTAGE REGULATOR (FIXED & ADJUSTABLE)

ELECTRICAL CHARACTERISTICS FOR LM1117

LM1117...