Product details

Output options Adjustable Output, Fixed Output Iout (Max) (A) 0.8 Vin (Max) (V) 15 Vin (Min) (V) 3.7 Vout (Max) (V) 13.8 Vout (Min) (V) 1.25 Fixed output options (V) 2.5, 2.8, 2.85, 3, 3.3, 5 Noise (uVrms) 38 Iq (Typ) (mA) 4 Thermal resistance θJA (°C/W) 65 Rating Catalog Load capacitance (Min) (µF) 10 Regulated outputs (#) 1 Features Accuracy (%) 2 PSRR @ 100 KHz (dB) 29 Dropout voltage (Vdo) (Typ) (mV) 1100 Operating temperature range (C) -40 to 125
Output options Adjustable Output, Fixed Output Iout (Max) (A) 0.8 Vin (Max) (V) 15 Vin (Min) (V) 3.7 Vout (Max) (V) 13.8 Vout (Min) (V) 1.25 Fixed output options (V) 2.5, 2.8, 2.85, 3, 3.3, 5 Noise (uVrms) 38 Iq (Typ) (mA) 4 Thermal resistance θJA (°C/W) 65 Rating Catalog Load capacitance (Min) (µF) 10 Regulated outputs (#) 1 Features Accuracy (%) 2 PSRR @ 100 KHz (dB) 29 Dropout voltage (Vdo) (Typ) (mV) 1100 Operating temperature range (C) -40 to 125
SOT-223 (DCY) 4 46 mm² 6.5 x 7 TO-263 (KTT) 3 155 mm² 10.16 x 15.24
  • 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

All trademarks are the property of their respective owners.

  • 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

All trademarks are the property of their respective owners.

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.

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

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Type Title Date
* Data sheet REG1117: 800mA 1A Low Dropout Pos Regulator 1.8, 2.5, 2.85, 3.3, 5V, Adjustable datasheet (Rev. D) 21 Jul 2004
Technical article 3 quiescent-current (Iq) specifications you need to understand 12 Nov 2021
Application note LDO Noise Demystified (Rev. B) 18 Aug 2020
Application note LDO PSRR Measurement Simplified (Rev. A) 09 Aug 2017
Application note Packaging Limits Range of Linear Regulators 08 May 2010
Application note An Easy Solution to Current Limiting an Op Amp 02 Oct 2000

Design & development

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

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