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  2. Power Monitor, Control, and Protection
  3. Digital Power System Management
  4. Buck Regulators with Digital Power System Management
  5. ADP1055


Features and Benefits

  • −40°C to +125°C operation with EEPROM data retention of 15 years at 125°C
  • PMBus Revision 1.2 compliant
  • 32-bit password protection with command masking
  • 64 address selections (16 base addresses, expandable to 64)
  • 6 PWM control signals, 625 ps resolution
  • Duty cycle double update rate
  • Digital control loop (PID + additional pole or zero configurability)
  • Programmable loop filters (CCM, DCM, low/normal temperature)
  • Frequency synchronization
  • Soft start and soft stop functionality
  • Average and peak constant current mode
  • External PN junction temperature sensing
  • 4 GPIOs (2 GPIOs configurable as active clamp snubber PWMs)
  • Fast line voltage feedforward
  • Adaptive dead time compensation for improved efficiency
  • Extended black box data recorder for fault recording
  • See datasheet for additional features

Product Details

The ADP1055 is a flexible, feature-rich digital secondary side controller that targets ac-to-dc and isolated dc-to-dc secondary side applications. The ADP1055 is optimized for minimal component count, maximum flexibility, and minimum design time. Features include differential remote voltage sense, primary and secondary side current sense, pulse-width modulation (PWM) generation, frequency synchronization, redundant OVP, and current sharing. The control loop digital filter and compensation terms are integrated and can be programmed over the PMBus interface. Programmable protection features include overcurrent (OCP), overvoltage (OVP) limiting, undervoltage lockout (UVLO), and external overtemperature (OTP).

The built-in EEPROM provides extensive programming of the integrated loop filter, PWM signal timing, inrush current, and soft start timing and sequencing. Reliability is improved through a built-in checksum and programmable protection circuits.

A comprehensive GUI is provided for easy design of loop filter characteristics and programming of the safety features. The industry-standard PMBus provides access to the many monitoring and system test functions. The ADP1055 is available in a 32-lead LFCSP and operates from a single 3.3 V supply.


  • Isolated dc-to-dc power supplies and modules
  • Redundant power supply systems

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.

Evaluation Kits (1)

Software & Systems Requirements

Product Recommendations

ADP1055 Companion Parts

Recommended Isolated Gate Drivers

  • 3 kV rms Isolated Precision Half-Bridge Driver, 4 A Output: ADUM3223.
  • Isolated, Half Bridge Gate Driver with Adjustable Dead Time, Dual Input, 4 A Output: ADuM4221.
  • 5 KV rms Isolated Precision Half-Bridge Driver, 4 A Output: ADUM4223.

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
ADP1055ACPZ-R7 Material Declaration Reliability Data 32-Lead LFCSP (5mm x 5mm x 0.75mm w/ EP)
ADP1055ACPZ-RL Material Declaration Reliability Data 32-Lead LFCSP (5mm x 5mm x 0.75mm w/ EP)
Wafer Fabrication Data

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Sample & Buy

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Evaluation Boards

Pricing displayed is based on 1-piece.

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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.