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ADP320:  Triple, 200 mA, Low Noise, High PSRR Voltage Regulator

Product Details

Product Status:Recommended for New Designs

The ADP320 200 mA triple output LDO combines high PSRR, low noise, low quiescent current, and low dropout voltage in a voltage regulator 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 ADP320 Triple LDO extend the battery life of portable devices. The ADP320 Triple LDO maintains power supply rejection greater than 60 dB for frequencies as high as 100 KHz while operating with a low headroom voltage. The ADP320 Triple LDO offers much lower noise performance than competing LDOs without the need for a noise bypass capacitor.

The ADP320 Triple LDO is available in a miniature 16 lead 3x3mm LFCSP package and is stable with tiny 1 μF ±30% ceramic output capacitors, resulting in the smallest possible board area for a wide variety of portable power needs.

The ADP320 Triple LDO is available in output voltage combinations ranging from 0.8 V to 3.3 V and offer over current and thermal protection to prevent damage in adverse conditions.

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


  • Bias voltage range (VBIAS): 2.5 V to 5.5 V
  • LDO input voltage range (VIN1/VIN2, VIN3): 1.8 V to 5.5 V
  • Three 200 mA low dropout voltage regulators
  • 16 lead 3x3mm LFCSP
  • Initial accuracy: ±1%
  • Stable with 1 μF ceramic output capacitors
  • No noise bypass capacitor required
  • Three independant logic controlled enables
  • Over current and thermal protection
  • Key specifications
  • High PSRR
  • 76dB PSRR up to 1 kHz
    70dB PSRR 10 kHz
    60 dB PSRR at 100 kHz
    40 dB PSRR at 1 MHz
  • Low output noise
    29 μV rms typical output noise at VOUT = 1.2 V
    55 μV rms typical output noise at VOUT = 2.8 V
  • Excellent transient response
  • See data sheet for additional features

Functional Block Diagram


Title Content Type File Type
ADP320: Triple, 200 mA, Low Noise, High PSRR Voltage Regulator (Rev B, 11/2014) (pdf, 709 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
Integrated Power Solutions for Altera FPGAs  (pdf, 2460 kB) Solutions Bulletins PDF
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

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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