FEATURES
FIXED AND ADJUSTABLE VERSIONS
2.85V MODEL FOR SCSI-2 ACTIVE
TERMINATION
OUTPUT CURRENT:
REG1117: 800mA max
REG1117A: 1A max
OUTPUT TOLERANCE:
1% max
DROPOUT VOLTAGE:
REG1117: 1.2V max at IO = 800mA
REG1117A: 1.3V max at IO = 1A
INTERNAL CURRENT LIMIT
THERMAL OVERLOAD PROTECTION
SOT-223 AND DDPAK SURFACE-MOUNT
PACKAGES

APPLICATIONS
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

DESCRIPTION
The REG1117 is a family of easy-to-use three-terminal
voltage regulators. The family includes a variety of fixedand
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.