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  2. Power Management
  3. LDO Linear Regulators
  4. Positive Linear Regulators (LDO)
  5. ADP320


Features and Benefits

  • 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, 3 mm × 3 mm LFCSP 
  • Initial accuracy: ±1% 
  • Stable with 1 µF ceramic output capacitors 
  • No noise bypass capacitor required 
  • 3 independent logic controlled enables 
  • Over current and thermal protection 
Key specifications 
  • High PSRR 
    • 76 dB PSRR up to 1 kHz 
    • 70 dB PSRR 10 kHz 
    • 60 dB PSRR at 100 kHz 
    • 40 dB PSRR at 1 MHz 
  • Low output noise 
    • 24 µV rms typical output noise at VOUT = 1.2 V 
    • 43 µV rms typical output noise at VOUT = 2.8 V 
  • Excellent transient response 
  • Low dropout voltage: 110 mV @ 200 mA load 
  • 85 µA typical ground current at no load, all LDOs enabled 
  • 100 µs fast turn-on circuit 
  • Guaranteed 200 mA output current per regulator 
  • −40°C to +125°C junction temperature 

Product Details

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 3 mm × 3 mm 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 offers 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

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

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.

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
ADP320ACPZ-110-R7 Material Declaration Reliability Data 16-Lead LFCSP (3mm x 3mm w/ EP)
ADP320ACPZ331815R7 Material Declaration Reliability Data 16-Lead LFCSP (3mm x 3mm w/ EP)
Wafer Fabrication Data

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Sample & Buy

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Buy Now Pricing

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List Pricing

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Lead Times

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