1. Products
  2. Power Management
  3. Switching Regulators
  4. Step-Down (Buck) Regulators
  5. Internal Power Switch Buck Regulators
  6. ADP3050

Alternative Parts


Features and Benefits

  • Wide Input Voltage Range: 3.6 V to 30 V
  • Adjustable and Fixed (3.3 V, 5 V) Output Options
  • Integrated 1 A Power Switch
  • Uses Small Surface-Mount Components
  • Cycle-By-Cycle Current Limiting
  • Peak Input Voltage (100 ms): 60 V
  • Configurable as a buck, buck-boost, and SEPIC regulator
  • Available in 8-lead SOIC package
  • Supported by ADIsimPower™ design tool

Product Details

The ADP3050 is a current mode monolithic buck (step down) PWM switching regulator that contains a high current 1 A power switch and all control, logic, and protection functions. It uses a unique compensation scheme allowing the use of any type of output capacitor (tantalum, ceramic, electrolytic, OS-CON). Unlike some buck regulators, the design is not restricted to using a specific type of output capacitor or ESR value.

A special boosted drive stage is used to saturate the NPN power switch, providing a system efficiency higher than conventional bipolar buck switchers. Further efficiency improvements are obtained by using the low voltage regulated output to provide the internal operating current of the device. A high switching frequency allows the use of small external surface-mount components. A wide variety of standard off-the-shelf devices can be used, providing a great deal of design flexibility. A complete regulator design requires only a few external components.

The ADP3050 includes a shutdown input that places the device in a low power mode, reducing the total supply current to under 20 µA. Internal protection features include thermal shutdown circuitry and a cycle-by-cycle current limit for the power switch to provide complete device protection under fault conditions.

The ADP3050 provides excellent line and load regulation, maintaining typically less than ±3% output voltage accuracy over temperature and under all input voltage and output current conditions.

The ADP3050 is specified over the industrial temperature range of −40°C to +85°C and is available in a thermally enhanced 8-lead (not Pb-free only) SOIC package and a standard 8-lead (Pb-free only) RoHS-compliant SOIC package.


  • Industrial power systems
  • PC peripheral power systems
  • Preregulator for linear regulators
  • Distributed power systems
  • Automotive systems
  • Battery chargers

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

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

Evaluation Kits (1)

Tools & Simulations

Design Tool

ADP3050 Buck Regulator Design Tool

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
ADP3050ARZ Material Declaration Reliability Data 8-Lead SOIC
ADP3050ARZ-3.3 Material Declaration Reliability Data 8-Lead SOIC
ADP3050ARZ-3.3-RL Material Declaration Reliability Data 8-Lead SOIC
ADP3050ARZ-3.3-RL7 Material Declaration Reliability Data 8-Lead SOIC
ADP3050ARZ-5 Material Declaration Reliability Data 8-Lead SOIC
ADP3050ARZ-5-REEL Material Declaration Reliability Data 8-Lead SOIC
ADP3050ARZ-5-REEL7 Material Declaration Reliability Data 8-Lead SOIC
ADP3050ARZ-R7 Material Declaration Reliability Data 8-Lead SOIC
ADP3050ARZ-RL Material Declaration Reliability Data 8-Lead SOIC
Wafer Fabrication Data

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Sample & Buy

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