800mA and 1A Low Dropout Positive Regulator
1.8V, 2.5V, 2.85V, 3.3V, 5V, and Adjustable
FEATURES
q
FIXED AND ADJUSTABLE VERSIONS
q
2.85V MODEL FOR SCSI-2 ACTIVE TERMINATION
q
OUTPUT CURRENT:
REG1117: 800mA max
REG1117A: 1A max
q
OUTPUT TOLERANCE:
1% max
q
DROPOUT VOLTAGE:
REG1117: 1.2V max at I
O
= 800mA
REG1117A: 1.3V max at I
O
= 1A
q
INTERNAL CURRENT LIMIT
q
THERMAL OVERLOAD PROTECTION
q
SOT-223 AND DDPAK SURFACE-MOUNT PACKAGES
APPLICATIONS
q
SCSI-2 ACTIVE TERMINATION
q
HAND-HELD DATA COLLECTION DEVICES
q
HIGH EFFICIENCY LINEAR REGULATORS
q
BATTERY POWERED INSTRUMENTATION
q
BATTERY MANAGEMENT CIRCUITS FOR
NOTEBOOK AND PALMTOP PCs
q
CORE VOLTAGE SUPPLY: FPGA, PLD, DSP, CPU
DESCRIPTION
The REG1117 is a family of easy-to-use three-terminal
voltage regulators. The family includes a variety of fixed-
and adjustable-voltage versions, two currents (800mA and
1A) and two package types (SOT-223 and DDPAK). See the
chart below for available options.
Output voltage of the adjustable versions is set with two
external resistors. The REG1117's low dropout voltage
allows its use with as little as 1V input-output voltage
differential.
Laser trimming assures excellent output voltage accuracy
without adjustment. An NPN output stage allows output
stage drive to contribute to the load current for maximum
efficiency.
REG1
117
REG1117
REG1117A
SBVS001B OCTOBER 2001
www.ti.com
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright 1992, Burr-Brown Corporation
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
800mA
1A
VOLTAGE
SOT-223
DDPAK
SOT-223
DDPAK
1.8V
2.5V
2.85V
3.3V
5V
Adj.
REG1117, REG1117A
2
SBVS001B
www.ti.com
ABSOLUTE MAXIMUM RATINGS
(1)
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Texas Instru-
ments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.
ESD damage can range from subtle performance degrada-
tion to complete device failure. Precision integrated circuits
may be more susceptible to damage because very small
parametric changes could cause the device not to meet its
published specifications.
Power Dissipation ........................................................... Internally Limited
Input Voltage ........................................................................................ 15V
Operating Junction Temperature Range ............................. 0
C to +125
C
Storage Temperature Range .......................................... 65
C to +150
C
Lead Temperature (soldering, 10s)
(2)
............................................ +300
C
NOTE: (1) Stresses above these ratings may cause permanent damage. (2) See
"Soldering Methods."
Plastic SOT-223
Plastic DDPAK
Tab is V
OUT
V
IN
V
OUT
Ground
(Adj.)
(1)
Tab is
V
OUT
V
IN
V
OUT
Ground
(Adj.)
(1)
NOTE: (1) Adjustable-Voltage Model.
CONNECTION DIAGRAM
Front View
SPECIFIED
PACKAGE
TEMPERATURE
PACKAGE
ORDERING
TRANSPORT
PRODUCT
V
O
/ I
O
PACKAGE-LEAD
DESIGNATOR
RANGE
MARKING
NUMBER
MEDIA, QUANTITY
800mA Output
REG1117-2.85
2.85 /800mA
SOT223-3
DCY
0
C to +125
C
BB11172
REG1117-2.85
Rails, 80
"
"
/
"
"
"
"
REG1117-2.85
Tape and Reel, 2500
REG1117-3.3
3.3 /800mA
SOT223-3
DCY
0
C to +125
C
BB11174
REG1117-3.3
Rails, 80
"
"
/
"
"
"
"
REG1117-3.3
Tape and Reel, 2500
REG1117F-3.3
3.3 /800mA
DDPAK-3
KTT
0
C to +125
C
BB1117F4
REG1117F-3.3
Rails, 49
"
"
/
"
"
"
"
REG1117F-3.3
Tape and Reel, 500
REG1117-5
5V/800mA
SOT223-3
DCY
0
C to +125
C
BB11175
REG1117-5
Rails, 80
"
"
/
"
"
"
"
REG1117-5
Tape and Reel, 2500
REG1117
Adj./800mA
SOT223-3
DCY
0
C to +125
C
BB1117
REG1117
Rails, 80
"
"
/
"
"
"
"
REG1117
Tape and Reel, 2500
1A Output
REG1117A-1.8
1.8V/1A
SOT223-3
DCY
0
C to +125
C
R111718
REG1117A-1.8
Rails, 80
"
"
/
"
"
"
"
REG1117A-1.8
Tape and Reel, 2500
REG1117FA-1.8
1.8 /1A
DDPAK-3
KTT
0
C to +125
C
REG1117FA1.8
REG1117FA-1.8
Rails, 49
"
"
/
"
"
"
"
REG1117FA-1.8
Tape and Reel, 500
REG1117A-2.5
2.5/1A
SOT223-3
DCY
0
C to +125
C
R111725
REG1117A-2.5
Rails, 80
"
"
/
"
"
"
"
REG1117A-2.5
Tape and Reel, 2500
REG1117FA-2.5
2.5/1A
DDPAK-3
KTT
0
C to +125
C
REG1117FA2.5
REG1117FA-2.5
Rails, 49
"
"
/
"
"
"
"
REG1117FA-2.5
Tape and Reel, 500
REG1117FA-5
5/1A
DDPAK-3
KTT
0
C to +125
C
REG1117FA5.0
REG1117FA-5.0
Rails, 49
"
"
/
"
"
"
"
REG1117FA-5.0
Tape and Reel, 500
REG1117A
Adj./1A
SOT223-3
DCY
0
C to +125
C
BB1117A
REG1117A
Rails, 80
"
"
/
"
"
"
"
REG1117A
Tape and Reel, 2500
REG1117FA
Adj./1A
DDPAK-3
KTT
0
C to +125
C
REG1117FA
REG1117FA
Rails, 49
"
"
/
"
"
"
"
REG1117FA
Tape and Reel, 500
PACKAGE/ORDERING INFORMATION
REG1117, REG1117A
3
SBVS001B
www.ti.com
ELECTRICAL CHARACTERISTICS
At T
J
= +25
C, unless otherwise noted.
REG1117, REG1117A
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
OUTPUT VOLTAGE
REG1117-2.85
I
O
= 10mA, V
IN
= 4.85V
2.820
2.85
2.880
V
See Note 1
I
O
= 0 to 800mA, V
IN
= 4.05 to 10V
2.790
2.85
2.910
V
REG1117-3.3
I
O
= 10mA, V
IN
= 5.3V
3.270
3.30
3.330
V
See Note 1
I
O
= 0 to 800mA, V
IN
= 4.8 to 10V
3.240
3.30
3.360
V
REG1117-5
I
O
= 10mA, V
IN
= 7V
4.950
5.00
5.050
V
See Note 1
I
O
= 0 to 800mA, V
IN
= 6.5 to 10V
4.900
5.00
5.100
V
REG1117A-1.8
I
O
= 10mA, V
IN
= 3.8V
1.782
1.8
1.818
V
See Note 1
I
O
= 0 to 1A, V
IN
= 3.8V to 10V
1.764
1.8
1.836
V
REG1117A-2.5
I
O
= 10mA, V
IN
= 4.5V
2.475
2.5
2.525
V
See Note 1
I
O
= 0 to 1A, V
IN
= 4.5V to 10V
2.450
2.5
2.550
V
REG1117A-5
I
O
= 10mA, V
IN
= 7V
4.950
5.0
5.050
V
See Note 1
I
O
= 0 to 1A, V
IN
= 7V to 10V
4.900
5.0
5.100
V
REFERENCE VOLTAGE
REG1117 (Adjustable)
I
O
= 10mA, V
IN
V
O
= 2V
1.238
1.250
1.262
V
See Note 1
I
O
= 10 to 800mA, V
IN
V
O
= 1.4 to 10V
1.225
1.250
1.280
V
REG1117A (Adjustable)
I
O
= 10mA, V
IN
V
O
= 2V
1.238
1.250
1.262
V
See Note 1
I
O
= 10mA to 1A, V
IN
V
O
= 1.4 to 10V
1.225
1.250
1.280
V
LINE REGULATION
REG1117-2.85
(1)
I
O
= 0, V
IN
= 4.25 to 10V
1
7
mV
REG1117-3.3
(1)
I
O
= 0, V
IN
= 4.8 to 10V
2
7
mV
REG1117-5
(1)
I
O
= 0, V
IN
= 6.5 to 15V
3
10
mV
REG1117 (Adjustable)
(1)
I
O
= 10mA, V
IN
V
O
= 1.5 to 13.75V
0.1
0.4
%
REG1117A (Adjustable)
(1)
I
O
= 10mA, V
IN
V
O
= 1.5 to 13.75V
0.1
0.4
%
REG1117A-1.8
(1)
I
O
= 0, V
IN
= 3.8V to 10V
1
7
mV
REG1117A-2.5
(1)
I
O
= 0, V
IN
= 4.5V to 10V
1
7
mV
REG1117A-5.0
(1)
I
O
= 0, V
IN
= 7V to 15V
3
10
mV
LOAD REGULATION
REG1117-2.85
(1)
I
O
= 0 to 800mA, V
IN
= 4.25V
2
10
mV
REG1117-3.3
(1)
I
O
= 0 to 800mA, V
IN
= 4.8V
3
12
mV
REG1117-5
(1)
I
O
= 0 to 800mA, V
IN
= 6.5V
3
15
mV
REG1117
(Adjustable)
(1)(2)
I
O
= 10 to 800mA, V
IN
V
O
= 3V
0.1
0.4
%
REG1117A
(Adjustable)
(1)(2)
I
O
= 10mA to 1A, V
IN
V
O
= 3V
0.1
0.4
%
REG1117A-1.8
I
O
= 0 to 1A, V
IN
= 3.8V
2
10
mV
REG1117A-2.5
I
O
= 0 to 1A, V
IN
= 4.5V
2
10
mV
REG1117A-5
I
O
= 0 to 1A, V
IN
= 7.0V
3
15
mV
DROPOUT VOLTAGE
(3)
All Models
(1)
I
O
= 100mA
1.00
1.10
V
See Note 1
I
O
= 500mA
1.05
1.15
V
REG1117 Models
(1)
I
O
= 800mA
1.10
1.20
V
REG1117A
I
O
= 1A
1.2
1.30
V
See Note 1
I
O
= 1A
1.2
1.55
V
CURRENT LIMIT
REG1117 Models
V
IN
V
O
= 5V
800
950
1200
mA
REG1117A
V
IN
V
O
= 5V
1000
1250
1600
mA
MINIMUM LOAD CURRENT
Adjustable Models
(1)(2)
V
IN
V
O
= 13.75V
1.7
5
mA
QUIESCENT CURRENT
Fixed-Voltage Models
(1)
V
IN
V
O
= 5V
4
10
mA
Adjust Pin Current
(1)(2)
I
O
= 10mA, V
IN
V
O
= 1.4 to 10V
50
120
A
vs Load Current, REG1117
(1)
I
O
= 10mA to 800mA, V
IN
V
O
= 1.4 to 10V
0.5
5
A
vs Load Current, REG1117A
(1)
I
O
= 10mA to 1A, V
IN
V
O
= 1.4 to 10V
0.5
5
A
THERMAL REGULATION
All Models
(4)
30ms Pulse
0.01
0.1
%/W
RIPPLE REJECTION
All Models
f = 120Hz, V
IN
V
OUT
= 3V + 1Vp-p Ripple
62
dB
TEMPERATURE DRIFT
Fixed-Voltage Models
T
J
= 0
C to +125
C
0.5
%
Adjustable Models
T
J
= 0
C to +125
C
2
%
REG1117, REG1117A
4
SBVS001B
www.ti.com
Thermal
Limit
10X
V
OUT
V
IN
Ground (Fixed-Voltage Models)
Adj. (Adjustable-Voltage Model)
(Substrate)
+
Current
Limit
SIMPLIFIED SCHEMATIC
LONG-TERM STABILITY
All Models
T
A
= +125
C, 1000Hr
0.3
%
OUTPUT NOISE
r ms Noise, All Models
f = 10Hz to 10kHz
0.003
%
THERMAL RESISTANCE
Operating Junction Temperature Range
0
+125
C
Storage Range
65
+150
C
Thermal Resistance,
JC
(Junction-to-Case at Tab)
3-Lead SOT-223 Surface-Mount
15
C/W
3-Lead DDPAK Surface-Mount
f > 50Hz
2
C/W
dc
3
C/W
Thermal Resistance,
JA
(Junction-to-Case at Tab)
3-Lead DDPAK Surface-Mount
No Heat Sink
65
C/W
NOTES: (1) Specification applies over the full operating Junction temperature range, 0
C to +125
C. (2) REG1117 and REG1117A adjustable versions require a
minimum load current for
3% regulation. (3) Dropout voltage is the input voltage minus output voltage that produces a 1% decrease in output voltage.
(4) Percentage change in unloaded output voltage before versus after a 30ms power pulse of I
O
= 800mA (REG1117 models), I
O
= 1A (REG1117A), V
IN
V
O
=
1.4V (Reading taken 10ms after pulse).
ELECTRICAL CHARACTERISTICS
(Cont.)
At T
J
= +25
C, unless otherwise noted.
REG1117, REG1117A
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
REG1117, REG1117A
5
SBVS001B
www.ti.com
At T
J
= +25
C, all models, unless otherwise specified.
TYPICAL CHARACTERISTICS
LOAD REGULATION
(
I
LOAD
= 800mA)
1
0
1
2
3
4
5
6
7
50
25
0
25
50
75
100
Temperature (
C)
Output Voltage Deviation (mV)
REG1117-5
REG1117-2.85
REG1117A-1.8
LINE REGULATION vs TEMPERATURE
6
5
4
3
2
1
0
1
2
50
25
0
25
50
75
100
Temperature (
C)
Output Voltage Change (mV)
REG1117-1.8
V
IN
= 3.8V to 10V
V
IN
= 6.5V to 15V
REG1117-5
RIPPLE REJECTION vs FREQUENCY
Frequency (Hz)
Ripple Rejection (dB)
100
90
80
70
60
50
40
30
20
10
0
10
100
1k
10k
100k
I
OUT
= 100mA
V
RIPPLE
= 1.0Vp-p
QUIESCENT CURRENT vs TEMPERATURE
8
7
6
5
4
3
2
1
0
50
25
0
25
50
75
100
Temperature (C)
Quiescent Current (mA)
Fixed-Voltage Models
SHORT-CIRCUIT CURRENT vs TEMPERATURE
1400
1300
1200
1100
1000
900
800
50
25
0
25
50
75
100
Temperature (C)
Short-Circuit Current (mA)
REG1117A
REG1117 Models
OUTPUT VOLTAGE vs TEMPERATURE
2.0
1.0
0
1.0
2.0
50
25
0
25
50
75
100
Temperature (C)
Output Voltage Change (%)
I
O
= 10mA
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