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Product details

Parameters

Output options Adjustable Output, Fixed Output Iout (Max) (A) 1 Vin (Max) (V) 15 Vin (Min) (V) 3.7 Vout (Max) (V) 13.8 Vout (Min) (V) 1.25 Fixed output options (V) 1.8, 2.5, 5 Noise (uVrms) 38 Iq (Typ) (mA) 4 Thermal resistance θJA (°C/W) 65 Load capacitance (Min) (µF) 10 Rating Catalog Regulated outputs (#) 1 Features Accuracy (%) 2 PSRR @ 100 KHz (dB) 29 Dropout voltage (Vdo) (Typ) (mV) 1200 Operating temperature range (C) -40 to 125 open-in-new Find other Linear regulators (LDO)

Package | Pins | Size

SOT-223 (DCY) 4 46 mm² 6.5 x 7 TO-263 (KTT) 3 155 mm² 10.16 x 15.24 open-in-new Find other Linear regulators (LDO)

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

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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.

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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet REG1117: 800mA 1A Low Dropout Pos Regulator 1.8, 2.5, 2.85, 3.3, 5V, Adjustable datasheet (Rev. D) Jul. 21, 2004
Application notes LDO Noise Demystified (Rev. B) Aug. 18, 2020
Technical articles LDO basics: capacitor vs. capacitance Aug. 01, 2018
Technical articles LDO Basics: Preventing reverse current Jul. 25, 2018
Technical articles LDO basics: introduction to quiescent current Jun. 20, 2018
Application notes LDO PSRR Measurement Simplified (Rev. A) Aug. 09, 2017
Technical articles LDO basics: noise – part 1 Jun. 14, 2017
Application notes Packaging Limits Range of Linear Regulators May 08, 2010
Application notes An Easy Solution to Current Limiting an Op Amp Oct. 02, 2000

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

CAD/CAE symbols

Package Pins Download
DDPAK/TO-263 (KTT) 3 View options
SOT-223 (DCY) 4 View options

Ordering & quality

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