REG1117
REG1117A
SBVS001D − OCTOBER 1992 − REVISED JULY 2004
800mA and 1A Low Dropout Positive Regulator
1.8V, 2.5V, 2.85, 3.3V, 5V, and Adjustable
FEATURES
D
FIXED AND ADJUSTABLE VERSIONS
D
2.85V MODEL FOR SCSI-2 ACTIVE
D
D
D
D
D
D
TERMINATION
OUTPUT CURRENT:
REG1117: 800mA max
REG1117A: 1A max
OUTPUT TOLERANCE:
+1%
max
DROPOUT VOLTAGE:
REG1117: 1.2V max at I
O
= 800mA
REG1117A: 1.3V max at I
O
= 1A
INTERNAL CURRENT LIMIT
THERMAL OVERLOAD PROTECTION
SOT-223 AND DDPAK SURFACE-MOUNT
PACKAGES
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 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.
800mA
VOLTAGE
SOT-223
DDPAK
1.8V
2.5V
2.85V
3.3V
5V
Adjustable
n
n
n
n
n
n
n
n
n
n
1A
SOT-223
DDPAK
n
n
APPLICATIONS
D
D
D
D
D
D
SCSI-2 ACTIVE TERMINATION
HAND-HELD DATA COLLECTION DEVICES
HIGH EFFICIENCY LINEAR REGULATORS
BATTERY-POWERED INSTRUMENTATION
BATTERY MANAGEMENT CIRCUITS FOR
NOTEBOOK AND PALMTOP PCs
CORE VOLTAGE SUPPLY: FPGA, PLD, DSP,
CPU
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.
All trademarks are the property of their respective owners.
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
1992−2004, Texas Instruments Incorporated
www.ti.com
REG1117
REG1117A
www.ti.com
SBVS001D − OCTOBER 1992 − REVISED JULY 2004
ABSOLUTE MAXIMUM RATINGS
(1)
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +15V
Operating Junction Temperature Range . . . . . . . . −40°C to +125°C
Storage Temperature Range . . . . . . . . . . . . . . . . . −65°C to +150°C
Lead Temperature (soldering, 10s)(2) . . . . . . . . . . . . . . . . . +300°C
(1) Stresses above these ratings may cause permanent damage.
(2) See
Soldering Methods
section.
This integrated circuit can be damaged by ESD. Texas
Instruments 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 degradation 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.
CONNECTION DIAGRAM
Front View
Plastic DDPAK
Tab is
V
OUT
Tab is V
OUT
Plastic SOT−223
Ground V
OUT
(Adj.)
(1)
V
IN
Ground V
OUT
(Adj.)
(1)
V
IN
NOTE: (1) Adjustable−Voltage Model.
2
REG1117
REG1117A
www.ti.com
SBVS001D − OCTOBER 1992 − REVISED JULY 2004
PACKAGE/ORDERING INFORMATION
(1)
PRODUCT
V
O
/I
O
PACKAGE-LEAD
PACKAGE
DESIGNATOR
OPERATING
TEMPERATURE
RANGE
−40°C to
+125°C
PACKAGE
MARKING
ORDERING
NUMBER
REG1117-2.85
REG1117-2.85
2.85/800mA
SOT223-3
DCY
BB11172
REG1117-2.85
REG1117-3.3
REG1117-3.3
3.3/800mA
SOT223-3
DCY
−40°C to
+125°C
BB11174
REG1117-3.3
REG1117F-3.3KTTT
REG1117F-3.3
3.3/800mA
DDPAK-3
KTT
−40 C
−40°C to
+125°C
BB1117F4
REG1117F-3.3/500
REG1117-5
REG1117-5
5V/800mA
SOT223-3
DCY
−40°C to
+125°C
BB11175
REG1117-5
REG1117
REG1117
Adj./800mA
SOT223-3
DCY
−40°C to
+125°C
BB1117
REG1117
REG1117A-1.8
REG1117A-1.8
1.8V/1A
SOT223-3
DCY
−40°C to
+125°C
R111718
REG1117A-1.8
REG1117FA-1.8KTTT
REG1117FA-1.8
1.8/1A
DDPAK-3
KTT
−40 C
−40°C to
+125°C
REG1117FA1.8
REG1117FA-1.8/500
REG1117A-2.5
REG1117A-2.5
2.5/1A
SOT223-3
DCY
−40°C to
+125°C
R111725
REG1117A-2.5
REG1117FA-2.5KTTT
REG1117FA-2.5
2.5/1A
DDPAK-3
KTT
−40 C
−40°C to
+125°C
REG1117FA2.5
REG1117FA-2.5/500
REG1117FA-5/KTTT
REG1117FA-5
5/1A
DDPAK-3
KTT
−40 C
−40°C to
+125°C
BB1117FA5.0
REG1117FA-5/500
REG1117A
REG1117A
Adj./1A
SOT223-3
DCY
−40°C to
+125°C
BB1117A
REG1117A
REG1117FA/KTTT
REG1117FA
Adj./1A
DDPAK-3
KTT
−40 C
−40°C to
+125°C
REG1117FA
REG1117FA/500
TRANSPORT
MEDIA,
QUANTITY
Rails, 80
Tape and Reel,
2500
Rails, 80
Tape and Reel,
2500
Tape and Reel,
50
Tape and Reel,
500
Rails, 80
Tape and Reel,
2500
Rails, 80
Tape and Reel,
2500
Rails, 80
Tape and Reel,
2500
Tape and Reel,
50
Tape and Reel,
500
Rails, 80
Tape and Reel,
2500
Tape and Reel,
50
Tape and Reel,
500
Tape and Reel,
50
Tape and Reel,
500
Rails, 80
Tape and Reel,
2500
Tape and Reel,
50
Tape and Reel,
500
(1) For the most current package and ordering information, see the Package Option Addendum located at the end of this data sheet.
3
REG1117
REG1117A
www.ti.com
SBVS001D − OCTOBER 1992 − REVISED JULY 2004
ELECTRICAL CHARACTERISTICS
At T
J
= +25°C, unless otherwise noted.
REG1117, REG1117A
PARAMETER
OUTPUT VOLTAGE
REG1117-2.85
See Note 1
REG1117-3.3
See Note 1
REG1117-5
See Note 1
REG1117A-1.8
See Note 1
REG1117A-2.5
See Note 1
REG1117A-5
See Note 1
REFERENCE VOLTAGE
REG1117 (Adjustable)
See Note 1
REG1117A (Adjustable)
See Note 1
LINE REGULATION
REG1117-2.85(1)
REG1117-3.3(1)
REG1117-5(1)
REG1117 (Adjustable)(1)
REG1117A (Adjustable)(1)
REG1117A-1.8(1)
REG1117A-2.5(1)
REG1117A-5.0(1)
LOAD REGULATION
REG1117-2.85(1)
REG1117-3.3(1)
REG1117-5(1)
REG1117 (Adjustable)(1)(2)
REG1117A (Adjustable)(1)(2)
REG1117A-1.8(1)
REG1117A-2.5
REG1117A-5
DROPOUT VOLTAGE(3)
All Models(1)
See Note 1
REG1117 Models(1)
REG1117A
See Note 1
I
O
= 10mA, V
IN
− V
O
= 2V
I
O
= 10 to 800mA, V
IN
− V
O
= 1.4 to 10V
I
O
= 10mA, V
IN
− V
O
= 2V
I
O
= 10mA to 1A, V
IN
− V
O
= 1.4 to 10V
I
O
= 0, V
IN
= 4.25 to 10V
I
O
= 0, V
IN
= 4.8 to 10V
I
O
= 0, V
IN
= 6.5 to 15V
I
O
= 10mA, V
IN
− V
O
= 1.5 to 13.75V
I
O
= 10mA, V
IN
− V
O
= 1.5 to 13.75V
I
O
= 0, V
IN
= 3.8V to 10V
I
O
= 0, V
IN
= 4.5V to 10V
I
O
= 0, V
IN
= 7V to 15V
I
O
= 0 to 800mA, V
IN
= 4.25V
I
O
= 0 to 800mA, V
IN
= 4.8V
I
O
= 0 to 800mA, V
IN
= 6.5V
I
O
= 10 to 800mA, V
IN
− V
O
= 3V
I
O
= 10mA to 1A, V
IN
− V
O
= 3V
I
O
= 0 to 1A, V
IN
= 3.8V
I
O
= 0 to 1A, V
IN
= 4.5V
I
O
= 0 to 1A, V
IN
= 7.0V
I
O
= 100mA
I
O
= 500mA
I
O
= 800mA
I
O
= 1A
I
O
= 1A
1.238
1.225
1.238
1.225
1.250
1.250
1.250
1.250
1
2
3
0.1
0.1
1
1
3
2
3
3
0.1
0.1
2
2
3
1.00
1.05
1.10
1.2
1.2
1.262
1.280
1.262
1.280
7
7
10
0.4
0.4
7
7
10
10
12
15
0.4
0.4
10
10
15
1.10
1.15
1.20
1.30
1.55
V
V
V
V
mV
mV
mV
%
%
mV
mV
mV
mV
mV
mV
%
%
mV
mV
mV
V
V
V
V
V
I
O
= 10mA, V
IN
= 4.85V
I
O
= 0 to 800mA, V
IN
= 4.05V to 10V
I
O
= 10mA, V
IN
= 5.3V
I
O
= 0 to 800mA, V
IN
= 4.8V to 10V
I
O
= 10mA, V
IN
= 7V
I
O
= 0 to 800mA, V
IN
= 6.5V to 10V
I
O
= 10mA, V
IN
= 3.8V
I
O
= 0 to 1A, V
IN
= 3.8V to 10V
I
O
= 10mA, V
IN
= 4.5V
I
O
= 0 to 1A, V
IN
= 4.5V to 10V
I
O
= 10mA, V
IN
= 7V
I
O
= 0 to 1A, V
IN
= 7V to 10V
2.820
2.790
3.270
3.240
4.950
4.900
1.782
1.764
2.475
2.450
4.950
4.900
2.85
2.85
3.30
3.30
5.00
5.00
1.8
1.8
2.5
2.5
5.0
5.0
2.880
2.910
3.330
3.360
5.050
5.100
1.818
1.836
2.525
2.550
5.050
5.100
V
V
V
V
V
V
V
V
V
V
V
V
CONDITION
MIN
TYP
MAX
UNIT
(1) Specification applies over the full specified 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 IO = 800mA (REG1117 models), IO = 1A (REG1117A),
VIN − VO = 1.4V (reading taken 10ms after pulse).
4
REG1117
REG1117A
www.ti.com
SBVS001D − OCTOBER 1992 − REVISED JULY 2004
ELECTRICAL CHARACTERISTICS (continued)
At T
J
= +25°C, unless otherwise noted.
REG1117, REG1117A
PARAMETER
CURRENT LIMIT
REG1117 Models
REG1117A
MINIMUM LOAD CURRENT
Adjustable Models(1)(2)
QUIESCENT CURRENT
Fixed-Voltage Models(1)
ADJUSTABLE PIN CURRENT(1)(2)
vs Load Current, REG1117(1)
vs Load Current, REG1117A(1)
THERMAL REGULATION
All Models(4)
RIPPLE REJECTION
All Models
TEMPERATURE DRIFT
Fixed-Voltage Models
Adjustable Models
LONG-TERM STABILITY
All Models
OUTPUT NOISE
rms Noise, All Models
THERMAL RESISTANCE
Thermal Resistance,
q
JC
3-Lead SOT-223 Surface-Mount
3-Lead DDPAK Surface-Mount
Thermal Resistance,
q
JA
3-Lead DDPAK Surface-Mount
f > 50Hz
dc
(Junction-to-Case at Tab)
No Heatsink
65
°C/W
(Junction-to-Case at Tab)
15
2
3
°C/W
°C/W
°C/W
f = 10Hz to 10kHz
0.003
%
TA = 125°C, 1000Hr
0.3
%
T
J
= 0°C to +125°C
T
J
= 0°C to +125°C
0.5
2
%
%
f = 120Hz, V
IN
− V
OUT
= 3V + 1VPP Ripple
62
dB
V
IN
− V
O
= 5V
V
IN
− V
O
= 5V
V
IN
− V
O
= 13.75V
V
IN
− V
O
= 5V
I
O
= 10mA, V
IN
− V
O
= 1.4 to 10V
I
O
= 10mA to 800mA, V
IN
− V
O
= 1.4 to 10V
I
O
= 10mA to 1A, V
IN
− V
O
= 1.4 to 10V
30ms Pulse
800
1000
950
1250
1.7
4
50
0.5
0.5
0.01
1200
1600
5
10
120
5
5
0.1
mA
mA
mA
mA
µA
µA
µA
%/W
CONDITION
MIN
TYP
MAX
UNIT
(1) Specification applies over the full specified 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 IO = 800mA (REG1117 models), IO = 1A (REG1117A),
VIN − VO = 1.4V (reading taken 10ms after pulse).
5
Embedded System
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