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
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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.
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1992−2004, Texas Instruments Incorporated
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