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ADP667:  +5 V Fixed, Adjustable Low-Dropout Linear Voltage Regulator

Product Details

The ADP667 is a low-dropout precision voltage regulator that can supply up to 250 mA output current. It can be used to give a fixed +5 V output with no additional external components or can be adjusted from +1.3 V to +16 V using two external resistors. Fixed or adjustable operation is automatically selected via the SET input. The low quiescent current (20 µA) in conjunction with the standby or shutdown mode (0.2 µA) makes this device especially suitable for battery powered systems. The dropout voltage when supplying 100 µA is only 5 mV allowing operation with minimal headroom and prolonging the battery useful life. At higher output current levels the dropout remains low increasing to just 150 mV when supplying 200 mA. A wide input voltage range from 3.5 V to 16.5 V is allowable.

Additional features include a dropout detector and a low supply/ battery monitoring comparator. The dropout detector can be used to signal loss of regulation, while the low battery detector can be used to monitor the input supply voltage.

The ADP667 is a pin-compatible replacement for the MAX667. It is specified over the industrial temperature range -40°C to +85°C and is available in an 8-pin DIP and in narrow surface mount (SOIC) packages.


  • Handheld Instruments
  • Cellular Telephones
  • Battery Operated Devices
  • Portable Equipment
  • Solar Powered Instruments
  • High Efficiency Linear Power Supplies


  • Low-Dropout: 150 mV @ 200 mA
  • Low Power CMOS: 20 µA Quiescent Current
  • Shutdown Mode: 0.2 µA Quiescent Current
  • 250 mA Output Current
  • Pin Compatible with MAX667
  • Stable with 10 µF Load Capacitor
  • Low Battery Detector
  • Fixed +5 V or Adjustable Output
  • +3.5 V to +16.5 V Input Range
  • Dropout Detector Output

Functional Block Diagram for ADP667


Title Content Type File Type
ADP667: +5 V Fixed, Adjustable Low-Dropout Linear Voltage Regulator Data Sheet (Rev A, 02/2014) (pdf, 135 kB) Data Sheets PDF
AN-1072: How to Successfully Apply Low Dropout Regulators  (pdf, 105 kB)
This application note reviews the basic LDO topology, explains key specifications, and shows the application of low dropout voltage regulators in systems.
Application Notes PDF
Introduction to ADIsimPower
ADIsimPower is a smart selector and a collection of downloadable tools that produce complete and optimized power designs. Schematic, bill of materials, and performance data are customized to your specific needs in minutes.
Videos HTML
Maximizing Battery Life in Communications Systems
(Analog Dialogue, Vol. 29, No. 3, 1995)
Analog Dialogue HTML
The Fundamentals of LDO Design and Applications Technical Articles HTML
What are LDOs and how are they used? FAQs/RAQs HTML
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
ADI Linear Regulator Design Tool and Parametric Search  (zip)
Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.
ADIsim Design/Simulation Tools ZIP
Download files for ADIsimPower™ Voltage Regulator Design Tool
The individual Excel-based voltage regulator design tools used in ADIsimPower™.
ADIsim Design/Simulation Tools HTML
ADIsimPower™ Voltage Regulator Design Tool
This expert design tool produces custom DC-DC converter designs in about a minute. The user enters 5 inputs and chooses to optimize for efficiency, PCB space, cost, or part count. Output is a complete schematic, BOM, efficiency plot, and performance summary. A PDF summary and a blank PCB is offered for each design to facilitate fast prototyping to verify the design.
ADIsim Design/Simulation Tools HTML
Launch of ADIsimPower Voltage Regulator Selection Vin (min) V Vout V   Find Solutions
Vin (max) V Iout A

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

SampleSample & Buy

Price, packaging, availability

ADP667 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
ADP667AN Status: Obsolete 8 ld PDIP 8 Ind Tube, 50 - - N  Material Info PCN Contact ADI
ADP667ANZ Status: Production 8 ld PDIP 8 Ind Tube, 50 $2.06 $1.90 Y  Material Info PCN Purchase
ADP667AR Status: Obsolete 8 ld SOIC 8 Ind Tube, 98 - - N  Material Info PCN Contact ADI
ADP667AR-REEL Status: Obsolete 8 ld SOIC 8 Ind Reel, 2500 - - N  Material Info PCN Contact ADI
ADP667AR-REEL7 Status: Obsolete 8 ld SOIC 8 Ind Reel, 1000 - - N  Material Info PCN Contact ADI
ADP667ARZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $1.97 $1.81 Y  Material Info PCN Purchase
ADP667ARZ-REEL Status: Obsolete 8 ld SOIC 8 Ind Reel, 2500 - - Y  Material Info PCN Contact ADI
ADP667ARZ-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $1.81 Y  Material Info PCN Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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