ADP1055

RECOMMENDED FOR NEW DESIGNS

Digital Controller for Power Supply Applications with PMB us Interface

Analog Devices ADP1055 Product Info

10 February 2026 7

Features

−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

Part details & applications

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.

APPLICATIONS

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

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