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1. DESCRIPTION
The REG1117-3.3 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.
2. FEATURES
1. FIXED AND ADJUSTABLE VERSIONS
2. 2.85V MODEL FOR SCSI-2 ACTIVE TERMINATION
3. OUTPUT CURRENT:
- REG1117: 800mA max
- REG1117A: 1A max
4. OUTPUT TOLERANCE: 1% max
5. DROPOUT VOLTAGE:
- REG1117: 1.2V max at IO = 800mA
- REG1117A: 1.3V max at IO = 1A
6. INTERNAL CURRENT LIMIT
7. THERMAL OVERLOAD PROTECTION
8. SOT-223 AND DDPAK SURFACE-MOUNT PACKAGES
3. APPLICATIONS
1. SCSI-2 ACTIVE TERMINATION
2. HAND-HELD DATA COLLECTION DEVICES
3. HIGH EFFICIENCY LINEAR REGULATORS
4. BATTERY-POWERED INSTRUMENTATION
5. BATTERY MANAGEMENT CIRCUITS FOR
6. NOTEBOOK AND PALMTOP PCs
7. CORE VOLTAGE SUPPLY: FPGA, PLD, DSP, CPU
4. Package overview
