Wide Range Input, Dual/Two-Phase, DC-to-DC Synchronous Buck Controller
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Product Details

The ADP1850 is a configurable dual output or two-phase, single output dc-to-dc synchronous buck controller capable of running from commonly used 3.3 V to 12 V (up to 20 V) voltage inputs. The device operates in current mode for improved transient response and uses valley current sensing for enhanced noise immunity.

The architecture enables accurate current sharing between interleaved phases for high current outputs.

The ADP1850 is ideal in system applications requiring multiple output voltages: the ADP1850 includes a synchronization feature to eliminate beat frequencies between switching devices; provides accurate tracking capability between supplies and includes precision enable for simple, robust sequencing.

The ADP1850 provides high speed, high peak current drive capability with dead-time optimization to enable energy efficient power conversion. For low load operation, the device can be configured to operate in power saving mode (PSM) by skipping pulses and reducing switching losses to improve the energy efficiency at light load and standby conditions.

The accurate current limit (±6%) allows the power architect to design within a narrower range of tolerances and can reduce overall converter size and cost. The ADP1850 provides a configurable architecture capable of wide range input operation to provide the designer with maximum re-use opportunities and improved time to market. Additional flexibility is provided by external programmability of loop compensation, soft start, frequency setting, power saving mode, current limit and current sense gain can all be programmed using external components.

The ADP1850 includes a high level of integration in a small size package. The start-up linear regulator and the boot-strap diode for the high side drive are included. Protection features include: undervoltage lock-out, overvoltage, overcurrent/short-circuit and over temperature. The ADP1850 is available in a compact 32-lead LFCSP 5 mm × 5 mm thermally enhanced package.

High current single and dual output intermediate bus and point of load converters requiring sequencing and tracking capability, including converters for:
  • Point-of-load power supplies
  • Telecom base station and networking
  • Consumer
  • Industrial and instrumentation
  • Healthcare and medical
  • Product Lifecycle

    checked 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.

    Evaluation Kits

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    Product Details

    This describes the design, operation, and test results of the ADP1850DP-EVALZ operating in dual-phase mode and the ADP1850SP-EVALZ operating in single-phase mode.

    The input range for this evaluation board is 10 V to 15 V, and the regulated output voltage is 1.09 V with a maximum 50 A output current. A switching frequency (fSW) of 300 kHz is chosen to achieve a good balance between efficiency and the sizes of the power components.

    The input range for the ADP1850SP-EVALZ evaluation board is 10 V to 20 V, and the two regulated output voltages are set to 3.3 V (VOUT1) and 1.8 V (VOUT2) with a maximum 14 A output current. A switching frequency (fSW) of 600 kHz is chosen to achieve a good balance between efficiency and the sizes of the power components.

    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.

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    Reference Materials

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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.

    ADP1850 Material Declaration
    PCN-PDN Information Quality And Reliability Symbols and Footprints



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    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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    Evaluation Boards Pricing displayed is based on 1-piece.
    Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.