ADP1055
RECOMMENDED FOR NEW DESIGNSDigital Controller for Power Supply Applications with PMBus Interface
- Part Models
- 2
- 1ku List Price
- Starting From $6.85
Overview
- −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
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
Documentation
Data Sheet 1
User Guide 2
Application Note 2
Technical Articles 4
Video 3
Analog Dialogue 1
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 Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| ADP1055ACPZ-R7 | 32-Lead LFCSP (5mm x 5mm x 0.75mm w/ EP) | ||
| ADP1055ACPZ-RL | 32-Lead LFCSP (5mm x 5mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jul 22, 2025 - 25_0055 Gold Wire to Copper Wire Conversion(PCA) |
||
| ADP1055ACPZ-R7 | PRODUCTION | |
|
Aug 21, 2019 - 19_0048 ADP1055 Die and Data Sheet Revision |
||
| ADP1055ACPZ-R7 | PRODUCTION | |
| ADP1055ACPZ-RL | PRODUCTION | |
|
Mar 17, 2015 - 15_0050 ADP1055 Data Sheet Change |
||
| ADP1055ACPZ-R7 | PRODUCTION | |
| ADP1055ACPZ-RL | PRODUCTION | |
|
May 29, 2014 - 14_0136 Assembly and Test Transfer of Select 4x4 and 5x5 mm LFCSP Products to STATS ChipPAC China |
||
| ADP1055ACPZ-R7 | PRODUCTION | |
| ADP1055ACPZ-RL | PRODUCTION | |
|
Feb 25, 2025 - 25_0054 Gold wire to Copper wire Conversion (Notification) |
||
| ADP1055ACPZ-RL | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Evaluation Software 1
Can't find the software or driver you need?
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| MOSFET & Gate Drivers 3 | ||
| ADUM3223 | PRODUCTION |
3 kV rms Isolated Precision Half-Bridge Driver, 4 A Output |
| ADuM4221 | RECOMMENDED FOR NEW DESIGNS | Isolated, Half Bridge Gate Driver with Adjustable Dead Time, Dual Input, 4 A Output |
| ADUM4223 | PRODUCTION |
5 KV rms Isolated Precision Half-Bridge Driver, 4 A Output |
Evaluation Kits
ADP1055 Evaluation Board
Resources
Software
ADP1055 Evaluation Board