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ADP225:  Dual, 300 mA Adjustable Output, QOD, Low Noise, High PSRR Voltage Regulator

Product Details

Product Status:Recommended for New Designs

The 300 mA, adjustable dual output ADP223/ADP225 and fixed dual output ADP222/ADP224 combine high PSRR, low noise, low quiescent current, and low dropout voltage in a voltage regulator that is ideally suited for wireless applications with demanding performance and board space requirements.

The low quiescent current, low dropout voltage, and wide input voltage range of the ADP222/ADP223/ADP224/ADP225 extend the battery life of portable devices.

The ADP222/ADP223/ADP224/ADP225 maintain power supply rejection greater than 60 dB for frequencies as high as 100 kHz while operating with a low headroom voltage. The ADP222/ADP223/ADP224/ADP225 offer much lower noise performance than competing LDOs without the need for a noise bypass capacitor. Overcurrent and thermal protection circuitry prevent damage in adverse conditions.

The ADP224 and ADP225 are identical to the ADP222 and ADP223, respectively, but with the addition of a quick output discharge (QOD) feature.

The ADP222/ADP223/ADP224/ADP225 are available in a small 8-lead, 2 mm x 2 mm LFCSP package and are stable with tiny 1 μF, ±30% ceramic output capacitors, resulting in the smallest possible board area for a wide variety of portable power needs.

- Mobile phones
- Digital camera and audio devices
- Portable and battery-powered equipment
- Portable medical devices
- Post dc-to-dc regulation


  • Input voltage range: 2.5 V to 5.5 V
  • Small, 8-lead, 2 mm x 2 mm LFCSP package
  • Initial accuracy: ±1%
  • High PSRR: 70 dB at 10 kHz, 60 dB at 100 kHz, 40 dB at 1 MHz
  • Low noise: 27 μV rms at VOUT = 1.2 V, 50 μV rms at VOUT = 2.8 V
  • Excellent transient response
  • Low dropout voltage: 170 mV at 300 mA load
  • 65 μA typical ground current at no load, both LDOs enabled
  • Quick output discharge (QOD) - ADP224/ADP225
  • Overcurrent and thermal protection


Title Content Type File Type
ADP222/ADP223/ADP224/ADP225: Dual, 300 mA Output, Low Noise, High PSRR Voltage Regulators Data Sheet (Rev E, 05/2014) (pdf, 743 kB) Data Sheets PDF
AN-1329: Noise Reduction Network for Adjustable Low Dropout Regulators  (pdf, 486 kB) 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
UG-227: Evaluating the ADP223 Dual, 300 mA Output, Adjustable, Low Noise, High PSRR Voltage Regulator  (pdf, 197 kB)
The ADP223 evaluation board can be used with ADP225 parts, too.
User Guides PDF
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.

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Price, packaging, availability

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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