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  3. LDO Linear Regulators
  4. Positive Linear Regulators (LDO)
  5. ADP3303

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Features and Benefits

  • High accuracy over line and load ±0.8% at +25°C, ±1.4% over temperature
  • Ultralow dropout voltage: 180 mV (typical) at 200 mA
  • Requires only CO = 0.47 μF for stability
  • anyCAP = stable with all types of capacitors (including MLCC)
  • 3.2 V to 12 V supply range
  • Current and thermal limiting
  • Low noise
  • Dropout detector
  • Low shutdown current: < 1 μA
  • Thermally enhanced SOIC_N package
  • Excellent Line and Load Regulation Performance

Product Details

The ADP3303 is a member of the ADP3300, ADP3301, and ADP3309 family of precision low dropout anyCAP voltage regulators. The ADP3303 stands out from the conventional LDOs with a different architecture, an enhanced process, and a different package. Its patented design requires only a 0.47 μF output capacitor for stability. This device is insensitive to capacitor Equivalent Series Resistance (ESR) and is stable with any good quality capacitor, including ceramic types (MLCC) for space restricted applications. The ADP3303 achieves exceptional accuracy of ±0.8% at room temperature and ±1.4% overall accuracy over temperature, line, and load regulations. The dropout voltage of the ADP3303 is only 180 mV (typical) at 200 mA.

In addition to the architecture and process, the Analog Devices, Inc., proprietary thermally enhanced package (Thermal Coastline) can handle 1 W of power dissipation without external heatsink or large copper surface on the printed circuit board (PCB).

This keeps PCB real estate to a minimum and makes the ADP3303 very attractive for use in portable equipment.

The ADP3303 operates with a wide input voltage range from 3.2 V to 12 V and delivers a load current in excess of 200 mA.

It features an error flag that signals when the device is about to lose regulation or when the short circuit or thermal overload protection is activated. Other features include shutdown and optional noise reduction capabilities. The ADP3300, ADP3301, and ADP3309 anyCAP LDO family offers a wide range of output voltages and output current levels:

ADP3300 (50 mA, SOT-23)
ADP3301 (100 mA) 
ADP3302 (100 mA, Dual Output)


  • Cellular telephones
  • Notebook, palmtop computers
  • Battery powered systems
  • Portable instruments
  • Post regulator for switching supplies
  • Bar code scanners

Product Lifecycle icon-not-recommended Not Recommended for New Designs

This designates products ADI does not recommend broadly for new designs.

Documentation & Resources

  • View All (12)
  • Data Sheets (1)
  • Application Notes (2)
  • User Guides (1)
  • Frequently Asked Questions (1)
  • Solutions Bulletins & Brochures (1)
  • Circuit Note (6)
  • Tools & Simulations

    Design Tools

    ADI Linear Regulator Design Tool and Parametric Search

    Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.

    Reference Designs (6)

    Design Resources

    ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

    Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
    ADP3303ARZ-3.3 Material Declaration Reliability Data 8-Lead SOIC
    ADP3303ARZ-3.3-RL7 Material Declaration Reliability Data 8-Lead SOIC
    ADP3303ARZ-3.3REEL Material Declaration Reliability Data 8-Lead SOIC
    ADP3303ARZ-5 Material Declaration Reliability Data 8-Lead SOIC
    ADP3303ARZ-5-REEL Material Declaration Reliability Data 8-Lead SOIC
    Wafer Fabrication Data

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