ADP1055:  Digital Controller for Power Supply Applications with PMBus Interface

Product Details

Product Status:Recommended for New Designs

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 moni-toring 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


  • −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

Typical Application Diagram for ADP1055

Design Tools,Models,Drivers & Software

Title Content Type File Type
ADP1055 Software
This software is used to program the ADP1055. It is truly graphic and interactive. Power design engineers with no prior programming experience can use the software to monitor and quickly adjust functions like PWM timings, frequency, filter settings, protection limits, etc.
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Evaluation Kits & Symbols & Footprints

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Price, packaging, availability

ADP1055 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
ADP1055ACPZ-R7 Status: Production LFCSP:LEADFRM CHIP SCALE 32 Ind Reel, 1500 - $4.60 Y  Material Info PCN Purchase Sample
ADP1055ACPZ-RL Status: Production LFCSP:LEADFRM CHIP SCALE 32 Ind Reel, 5000 - $4.60 Y  Material Info PCN Purchase
Price Table Help

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.

ADP1055 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
ADP-I2C-USB-Z Status: Production USB to I2C Adapter $250.00 Yes -
ADP1055-EVALZ Status: Production ADP1055 Evaluation Board $300.00 Yes -
ADP1055DC1-EVALZ Status: Production ADP1055 Daughter Card $100.00 Yes -

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.

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