Power Solution for C667x DSP AVS Core (CVDD) with Dynamic Voltage Scaling


Design files


This reference design aims to supply the AVS core supply (CVDD) in the Keystone Multicore DSPs, mainly the C66x series. The C66x series uses SmartReflex technology to enable the DSP to control its supply voltage. In order to meet this requirement, this design combines a Synchronous Buck Converter (TPS56121) with the voltage Programmer for POL (LM10011). The LM10011 accepts a 6-bit or 4-bit VCNTL from the DSP and changes the output voltage of the TPS56121 to what the DSP requires. The LM10011 has a high accuracy (1.0%) accuracy allowing  additional system margin in the remaining power supply components and distribution. For processors which require specific initial startup voltages the LM10011 can be configured to start up at one of 16 selectable currents.

  • 1.0% Output Current Accuracy (0°C to +100°C)
  • 1.25% Output Current Accuracy (–40°C to +125°C)
  • Input Voltage Range: +2.97V to +5.5V
  • Pin Selectable VID Format (6/4 bit)
  • 16 Selectable Start-Up Currents
  • Precision Enable to Support Custom UVLO
  • Tested reference design that includes schematic, design files, bill of materials, and test data.
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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.

TIDU393.PDF (1300 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

TIDR731.PDF (276 K)

Detailed schematic diagram for design layout and components

TIDR732.ZIP (17 K)

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

TIDC467.ZIP (2171 K)

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


Includes TI products in the design and potential alternatives.

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Digital signal processors (DSPs)

TMS320C66704 core fixed and floating point DSP for Communications and Telecom

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Digital signal processors (DSPs)

TMS320C6671High performance single-core C66x fixed and floating-point DSP - 1GHz

Data sheet: PDF
Digital signal processors (DSPs)

TMS320C6672High performance dual-core C66x fixed and floating-point DSP- up to 1.25GHz

Data sheet: PDF
Digital signal processors (DSPs)

TMS320C6674High performance quad-core C66x fixed and floating-point DSP- up to 1.25GHz

Data sheet: PDF
Digital signal processors (DSPs)

TMS320C6678High performance octo-core C66x fixed and floating-point DSP- up to 1.25GHz

Data sheet: PDF
Linear & low-dropout (LDO) regulators

TLV704150-mA 24-V ultra-low-IQ low-dropout (LDO) voltage regulator

Data sheet: PDF | HTML
Power modules (integrated inductor)

TPS843204.5-V to 14.5-V Input, 3-A Synchronous Buck, Integrated Power Solution

Data sheet: PDF
Precision DACs (≤10 MSPS)

LM100111% Accuracy 4/6-Bit VID Voltage Programmer for Point of Load Regulator w/ Adj Start-Up Current

Data sheet: PDF

Technical documentation

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Type Title Date
Test report PMP8275 Test Results Jun. 13, 2014

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