Overview

Features and Benefits

  • 25-Bit Digital Output Voltage Control
  • Wide Input Voltage Range: 3.1V to 15V
  • ±4A Output Current
  • High Output Power: Up to 54W1
  • High Efficiency at High Frequency
    • 92.6% Efficiency at 4A, 15VIN, fSW = 3MHz
  • SPI Interface Allows User to:
    • Set Output Regulation Voltage
    • Set Output Current Limits
    • Check Device Status
    • Enable/Disable Output
  • Integrated 4A Power Switches
  • Silent Switcher® Architecture
  • Analog Output for Diagnostics/Telemetry
  • Adjustable and Synchronizable: 500kHz to 3MHz
  • Small 3mm × 3mm 18-Lead LQFN

1 VTEC = ±13.5V/±4A with VIN = 15V, fSW = 1MHz

Product Details

The LT8722 is a high performance, high efficiency, monolithic full bridge DC/DC converter. One side of the full bridge is driven by a pulse width modulation (PWM) buck power stage, while the other side of the full bridge is driven by a linear power stage. The LT8722 can deliver up to ±54W1 of power to its load while only requiring a single inductor. An integrated 25-bit digital-to-analog converter (DAC) is used to control the LT8722 output voltage. Two additional 9-bit DACs control the positive and negative output current limits. An analog output telemetry pin can be used to monitor SPI selectable parameters such as VIN, VOUT, IOUT or the LT8722 junction temperature. The serial peripheral interface (SPI) can be used to configure and control the LT8722 allowing for flexibility to set the desired output voltage, output current limits, voltage limits, switching frequency and control ON/OFF behavior. The SPI operates at up to 10MHz allowing for fast readback and control. The LT8722 operates from a single 3.1V to 15V supply. Silent Switcher techniques are used to minimize EMI/EMC emissions while delivering high efficiency at high switching frequencies. The LT8722 is available in a 3mm × 3mm LQFN package.

1 VTEC = ±13.5V/±4A with VIN = 15V, fSW = 1MHz

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.

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.

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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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