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PDF REG1117 Data sheet ( Hoja de datos )

Número de pieza REG1117
Descripción 800mA and 1A Low Dropout Positive Regulator
Fabricantes Burr-Brown Corporation 
Logotipo Burr-Brown Corporation Logotipo



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No Preview Available ! REG1117 Hoja de datos, Descripción, Manual

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
TERMINATION
D OUTPUT CURRENT:
REG1117: 800mA max
REG1117A: 1A max
D OUTPUT TOLERANCE: +1% max
D DROPOUT VOLTAGE:
REG1117: 1.2V max at IO = 800mA
REG1117A: 1.3V max at IO = 1A
D INTERNAL CURRENT LIMIT
D THERMAL OVERLOAD PROTECTION
D SOT-223 AND DDPAK SURFACE-MOUNT
PACKAGES
APPLICATIONS
D SCSI-2 ACTIVE TERMINATION
D HAND-HELD DATA COLLECTION DEVICES
D HIGH EFFICIENCY LINEAR REGULATORS
D BATTERY-POWERED INSTRUMENTATION
D BATTERY MANAGEMENT CIRCUITS FOR
NOTEBOOK AND PALMTOP PCs
D 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 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.
VOLTAGE
1.8V
2.5V
2.85V
3.3V
5V
Adjustable
800mA
SOT-223 DDPAK
n
nn
n
n
1A
SOT-223 DDPAK
nn
nn
n
nn
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

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REG1117 pdf
www.ti.com
REG1117
REG1117A
SBVS001D − OCTOBER 1992 − REVISED JULY 2004
ELECTRICAL CHARACTERISTICS (continued)
At TJ = +25°C, unless otherwise noted.
REG1117, REG1117A
PARAMETER
CONDITION
MIN
TYP
MAX
UNIT
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)
VIN − VO = 5V
VIN − VO = 5V
VIN − VO = 13.75V
VIN − VO = 5V
IO = 10mA, VIN − VO = 1.4 to 10V
IO = 10mA to 800mA, VIN − VO = 1.4 to 10V
IO = 10mA to 1A, VIN − VO = 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
RIPPLE REJECTION
All Models
TEMPERATURE DRIFT
f = 120Hz, VIN − VOUT = 3V + 1VPP Ripple 62 dB
Fixed-Voltage Models
Adjustable Models
LONG-TERM STABILITY
TJ = 0°C to +125°C
TJ = 0°C to +125°C
0.5 %
2%
All Models
OUTPUT NOISE
TA = 125°C, 1000Hr
0.3 %
rms Noise, All Models
f = 10Hz to 10kHz
0.003
%
THERMAL RESISTANCE
Thermal Resistance, qJC
3-Lead SOT-223 Surface-Mount
(Junction-to-Case at Tab)
15 °C/W
3-Lead DDPAK Surface-Mount
f > 50Hz
2 °C/W
dc 3 °C/W
Thermal Resistance, qJA
3-Lead DDPAK Surface-Mount
(Junction-to-Case at Tab)
No Heatsink
65 °C/W
(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

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REG1117 arduino
www.ti.com
TERMPWR
5V
1N5817
2.85V
REG1117−2.85
110
10µF
10µF
110
(Up to 27 Lines)
REG1117
REG1117A
SBVS001D − OCTOBER 1992 − REVISED JULY 2004
110
TERMPWR
5V
2.85V
REG1117−2.85
1N5817
10µF
10µF
110
Figure 7. SCSI Active Termination Configuration
VIN > 12V
+
10µF
REG1117−5
In Out 5V to 10V
GND
+
100µF
10µF +
1k
VIN > 9.0V
+
10µF
REG1117−5
In Out
GND
7.5V
+
100µF
2.5VOUT
REF1004−2.5
Figure 8. Adjusting Output of Fixed Voltage Models
Figure 9. Regulator with Reference
VIN
+
10µF
1k
6.5V
10µF +
REG1117−5
In Out
GND
50
5.2V Line
5.0V Battery
REG1117−5
In Out
GND
+ 100µF
Figure 10. Battery Backed-Up Regulated Supply
REG1117−5
VIN In Out
10µF +
GND
+ 100µF
Floating Input
VOUT = 5V
Figure 11. Low Dropout Negative Supply
11

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