500 mA Synchronous Buck Switching Regulator
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Product Details

The ADP3051 is a high frequency, general purpose synchronous buck switching regulator capable of 500 mA continuous output current in an MSOP-8 package. It provides high efficiency, excellent dynamic response, and is very simple to use. The switching frequency is nominally 600 kHz - synchronizable to 750 kHz - and allows for small, cost-saving external inductive and capacitive components. The current mode control loop is simple to compensate. Featuring a patented tri-mode, variable-frequency control technique, it operates in normal PWM current mode under heavy loads, and saves energy at lighter loads by switching automatically into a two level power-saving mode. Soft start and shutdown are integrated completely on chip, as is the power switch.

The ADP3051 supports output voltages as low as 0.8 V, while operating from a 2.5 to 5.5 V input, and is optimized for portable consumer and communications applications where long battery life and low power consumption are required. The ADP3051's low-voltage operation and 3 percent output regulation accuracy over line, load and temperature make it ideal for today's low voltage rails, providing the optimal solution for delivering power precisely and efficiently with minimal printed circuit board area.


  • PDAs and Palmtop Computers
  • Consumer Electronics
  • Portable Instruments

Product Lifecycle

checked Last Time Buy

All products in this family will be obsolete soon. Please contact ADI Sales or Distributors to arrange for final purchases and read our Obsolescence Information to review the time periods for placing final orders and receiving final shipments.

Evaluation Kits

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Product Details

In order to get the correct unpopulated evaluation board with an appropriate Bill of Materials and Schematic, you need to use the button for "Request Evaluation Board" from within the design tool. Make sure the design tool is in a state that matches your desired power requirements.

This will create a template email that will request from us the proper blank evaluation board for that ADI part and your application's power parameters.

Note: Some parts have multiple blank boards for high/low current or for different topologies (Boost, SEPIC, SEPIC-Cuk), while other blank boards support multiple ADI parts. This is why it is important to run the design tool with your parameters before making your email request from the tool.

Tools & Simulations

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Design Tools

Reference Materials

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Design Resources

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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.

ADP3051 Material Declaration
PCN-PDN Information Quality And Reliability Symbols and Footprints



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