High-power density reference design for automotive vehicle-to-everything (V2X) power
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Key Document


This reference design provides the system rails for automotive vehicle-to-everything power. A 5-V bus is generated by the off-battery buck converter (LM63625-Q1), and this supplies all the point-of-load devices. The bus converter switches at 2.1 MHz, and the load converters (TPS628501-Q1) switch at 2.2 MHz. Easily configurable jumpers allow users to enable and disable each device on the board and toggle the bus converter operational modes. A front-end EMI filter is included.

  • Small solution size measuring 1.20 inches X 1.06 inches
  • All converters operate with an output voltage ripple of less than 2% at full load
  • All switching converters operate above 2 MHz to avoid the AM band
  • Built for easy testability using configurable jumpers and test points
  • Automotive-qualified solution

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Schematic/Block Diagram

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Design Guide

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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)
(Output Voltage 6)
(Output Voltage 7)
Vin (Min) (V)6555555
Vin (Max) (V)16555555
Vout (Nom) (V)553.
Iout (Max) (A)
Output Power (W)1211.
TopologyBuck- SynchronousOtherLinear RegulatorBuck- SynchronousBuck- SynchronousBuck- SynchronousBuck- Synchronous

TI Devices (4)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM63625-Q1  3.5-V to 36-V, 2.5-A step-down voltage converter with spread spectrum  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules
TLV733P-Q1  Automotive 300-mA, low-IQ, low-dropout voltage regulator with enable  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS22965-Q1  5.7-V, 4-A, 16-mΩ automotive load switch with adj. rise time and output discharge  Power switches  Sample & Buy View Design Kits & Evaluation Modules
TPS628501-Q1  2.7-V to 6-V, 1-A automotive step-down converter in SOT583 package  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM63625-Q1 Download
Download Download
TLV733P-Q1 Download -
Download Download
TPS22965-Q1 Download Download
TPS628501-Q1 Download Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 7240 17 Feb 2021
Design files (6)
Title Type Size (KB) Date
ZIP 926 08 Mar 2021
ZIP 1276 08 Mar 2021
PDF 1465 08 Mar 2021
PDF 258 08 Mar 2021
PDF 273 08 Mar 2021
PDF 297 08 Mar 2021

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