Automotive I.MX6 Quad Core Processor Power Solution Reference Design
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Key Document


The PMP4442 reference design is an low-cost discrete power solution to power I.MX6 quad core. All the DCDC regulators are running at 2MHz to avoid the AM band interference and provide low solution size. The first stage DCDC converter can support wide Vin range from 6V to 42V, which can support start-stop system as well as load dump. The second stage DCDC provides all the necessary power rails to power up I.MX6 quad core. I.MX6 is very loose on the power sequencing of the different rails so no sequencer is necessary for this design. It uses a 4 layer board with 2oz copper to have better thermal characteristic at 2MHz switching frequency and 85C ambient.

  • Wide input voltage range: off battery 6V to 42V power supply to support start-stop system and load dump
  • The DCDC regulator all run at 2MHz to avoid AM band interference and very small form factor
  • No sequencer is needed since I.MX6 is very loose on the power rails sequencing
  • First stage wide Vin async DCDC converter, TPS54561-Q1, can run at 4A, 5V out at 2MHz to allow users to avoid using controller to save cost, area and avoid voltage shoot through
  • I.MX6 vcore voltage can run at 4A, it can provide the current at least 30% higher than even the highly atypical condition which is dual 1080p video playback plus one 3D graphics
  • All the power rails powering I.MX6 ripple are below 5%
  • Sink/source voltage regulator that will provide the VTT termination voltage for DDR memory

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Design Files

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(Output Voltage 1)
(Output Voltage 2)
(Output Voltage 3)
(Output Voltage 4)
(Output Voltage 5)
Vin (Min) (V)66666
Vin (Max) (V)4242424242
Vout (Nom) (V)1.51.4253.31.83.33
Iout (Max) (A)341.51.15
Output Power (W)
TopologyBuck- SynchronousBuck- SynchronousBuck- SynchronousBuck- SynchronousLinear Regulator

TI Devices (5)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM26420-Q1  Dual 2 A, automotive-qualified, high-efficiency synchronous DC/DC converter  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules
TLV700-Q1  Automotive 200-mA, high-PSRR, low-IQ, low-dropout voltage regulator with enable  Power management  Sample & Buy Not Available
TPS54388-Q1  Automotive 2.95V to 6V, 3A, 2MHz Synchronous Buck Converter  Step-down (buck) regulators  Not Available View Design Kits & Evaluation Modules
TPS54561-Q1  Automotive 4.5V to 60V Input 5A Step-Down DC-DC Converter With Soft-Start and Eco-mode™  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules
TPS57114-Q1  Automotive 2.95V to 6V, 4A, 2MHz Synchronous Buck Converter  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM26420-Q1 Download Download
Download Download
TLV700-Q1 Download
TPS54388-Q1 Download Download
TPS54561-Q1 Download Download
TPS57114-Q1 Download Download

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Technical documentation

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User guide (2)
Title Type Size (KB) Date
PDF 1900 13 Jan 2015
PDF 237 13 Jan 2015
Design files (3)
Title Type Size (KB) Date
ZIP 715 13 Jan 2015
PDF 66 13 Jan 2015
PDF 100 13 Jan 2015

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