CISPR 25 Class 5 Rated 3.3W Automotive Power Reference Design
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The PMP9397 reference design provides a conducted EMI optimized 3.3W power supply design for automotive applications.  The design uses the non-synchronous buck regulator, LM26001, to generate a 3.3V, 1A output.  The input voltage range is 4.5V to 38V suitable for automotive battery supply.  The reference design comes with the input EMI filter stage to suppress the switching noise in the input supply line, and the board is tested to be compliant with the CISPR 25 Class 5 conducted emissions standard.

  • CISPR 25 class 5 conducted emissions standard compliance
  • LM26001, 38V, 1A, buck regulator
  • 4.5-38V operating input voltage range
  • Input EMI filter to suppress conducted emissions
  • Optimized layout for better EMI performance
  • 3.3W power supply design, ideal for 12V automotive battery system

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Schematic/Block Diagram

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Design Files

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(Output Voltage 1)
Vin (Min) (V)4.5
Vin (Max) (V)38
Vout (Nom) (V)3.3
Iout (Max) (A)1
Output Power (W)3.3
Input TypeDC
TopologyBuck- Non Sync

TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM26001  1.5A Switching Regulator with High Efficiency Sleep Mode  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM26001 Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 203 24 Nov 2014
Design files (3)
Title Type Size (KB) Date
ZIP 65 24 Nov 2014
PDF 25 24 Nov 2014
PDF 190 24 Nov 2014

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