REG1117 Description

The REG1117 is a three-terminal voltage regulator family that is simple to operate. There are several fixed and adjustable-voltage versions, two currents (800mA and 1A), and two package types in the family (SOT-223 and DDPAK). For a list of possible alternatives, see the chart below.

Two external resistors control the output voltage of the adjustable variants. The low dropout voltage of the REG1117 permits it to be used with a 1V input-output voltage differential.

REG1117 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

REG1117 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