Power Sequencing for K2E Using UCD9090 with PMBus


Design files


The K2E devices require power supplies to be sequenced in a proper order. This design demonstrates power sequencing for the 66AK2Ex and AM5K2Ex families of KeyStone II ARM+DSP and ARM-only multicore processors by use of the UCD9090. The UCD9090 is a 10-rail PMBus/I2C addressable power-supply sequencer and monitor. The UCD9090 provides both sequence and timing of the power supply enables. This design shows a power sequencing implementation specific to the K2E EVM platform.

  • Power supply sequencing reference implementation for the 66AK2Ex and AM5K2Ex SoCs.
  • Uses UCD9090 for power supply sequencing and monitoring for nine voltage rails.
  • Uses the Fusion Digital Power Designer Software to configure and program the UCD9090.
  • Complete system reference with schematics, BOM, design files, and HW Design Guide, implemented on the K2E EVM platform for testing and evaluation.
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

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

TIDU879.PDF (2759 K)

Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRDU8.ZIP (4863 K)

Files used for 3D models or 2D drawings of IC components

TIDCA16.ZIP (22 K)

Design file that contains information on physical board layer of design PCB

TIDC685.ZIP (26925 K)

Design file that contains information on physical board layer of design PCB

TIDRB27.ZIP (7495 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Arm-based processors

66AK2E05High performance multicore DSP+Arm - 4x Arm A15 cores, 1x C66x DSP core, NetCP, 10GbE

Data sheet: PDF
Arm-based processors

AM5K2E02Sitara processor: dual-Arm Cortex-A15

Data sheet: PDF
Arm-based processors

AM5K2E04Sitara processor: quad-Arm Cortex-A15

Data sheet: PDF

UCD909010-Channel Sequencer and System Health Monitor

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Design guide Power Sequencing for 66AK2E0x and AM5K2E0x Using UCD9090 Design Guide Mar. 31, 2015
Application note Hardware Design Guide for KeyStone II Devices Mar. 24, 2014

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