PMBus Voltage Regulator Reference Design for NXP QorIQ LS2085A/88A Processors
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.

Description & Features

Technical documentation

Support & Training

Order Now

See the Important Notice and Disclaimer covering reference designs and other TI resources.

Key Document


TIDA-01512 uses the TPS53681 multiphase controller and CSD95490Q5MC Smart Power Stages to implement a high-performance design suitable for powering NXP QorIQ Communications Processors.

The dual outputs of the controller target the 60-ATDC, 1.0-V core rail with a four-phase design and a 30-ATDC, 1.2-V auxilliary rail. Utilizing smart power stages and integrated PMBus™ functionality allows for easy output voltage setting, telemetry of key design parameters, and compensation adjustment.

During validation a >50% reduction in output capacitance was seen over NXP 's reference board.

  • Dual Rail 4+2 Design - Targeting LS2085A/88A VDD and GVDD Rails
  • PMBus monitoring of VIN, VOUT, IOUT, PIN, and POUT
  • Dual Rail Temperature Monitoring
  • Peak Efficiencies of 92% and 94% for VDD and GVDD Rails
  • >50% reduction in COUT over NXP Eval Board

See the Important Notice and Disclaimer covering reference designs and other TI resources.


Schematic/Block Diagram

Quickly understand overall system functionality.

Download Schematic

Test Data

Get results faster with test and simulation data that's been verified.

Download Test Data

Design Files

Download ready-to-use system files to speed your design process. Get Viewer.

Download Design Files

TI Devices (5)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD17570Q5B  30-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 0.92 mOhm  MOSFETs  Sample & Buy Not Available
CSD95490Q5MC  75A Synchronous Buck NexFET™ Smart Power Stage with DualCool Package  MOSFETs  Not Available Not Available
TPS53681  Dual-Channel 6+2/5+3 D-CAP+TM Multiphase Step-Down Controller with PMBus and NVM  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules
TPS737-Q1  Automotive 1-A, ultra-low-dropout voltage regulator with reverse current protection & enable  Power management  Sample & Buy Not Available
UCC27524A  5-A/5-A dual-channel gate driver with 5-V UVLO, enable, and negative input voltage handling  Gate drivers  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD17570Q5B VSON-CLIP (DNK)| 8 Download
CSD95490Q5MC VSON-CLIP (DMC)| 12 Download -
TPS53681 Download Download
TPS737-Q1 Download Download
UCC27524A Download

Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.

Step 1: Download and install the free download.

Step 2: Download the Symbol and Footprint from the CAD.bxl file table.

Technical documentation

See the Important Notice and Disclaimer covering reference designs and other TI resources.

User guide (1)
Title Type Size (KB) Date
PDF 10748 23 Aug 2018
Design files (5)
Title Type Size (KB) Date
ZIP 708 22 Dec 2017
PDF 454 22 Dec 2017
PDF 142 22 Dec 2017
PDF 217 22 Dec 2017
PDF 504 22 Dec 2017
Related Tools & Software

Software development (1)

Name Part Number Software Type
Digital Power Software  FUSION_DIGITAL_POWER_DESIGNER  Application software & framework 

Support & training

TI E2E™ forums with technical support from TI engineers

Search our extensive online knowledge base where millions of technical questions and answers are available 24/7.

Search answers from TI experts

Content is provided 'AS IS' by the respective TI and Community contributors and does not constitute TI specifications.
See terms of use.

If you have questions about quality, packaging, or ordering TI products visit our Support page.

Technical articles