Wide Vin, 3A Buck 2-Layer Reference Design for Automotive Cluster with CISPR 25 Class 5 Compliance
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Key Document


The PMP10735 reference design is a 5V, 3A output power supply in a 2-layer board design for off-battery automotive instrument cluster applications. The reference board has an input EMI filter and optmized layout for improved EMI performance.

  • LM43603-Q1 automotive grade SIMPLE SWITCHER® wide Vin synchronous buck regulator
  • 6.5V to 35V input voltage range
  • 94% peak efficiency at 12V input
  • EMI optimized 2-layout design in compliance with CISPR 25 Class 5 conducted emissions standard
  • 400kHz frequency PWM , and PFM at light load
  • Reference board is tested, and the test report and design files are included

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Design Files

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(Output Voltage 1)
Vin (Min) (V)6.5
Vin (Max) (V)35
Vout (Nom) (V)5
Iout (Max) (A)3
Output Power (W)15
Input TypeDC
TopologyBuck- Synchronous

TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM43603-Q1  Automotive Qualified 3.5V to 36V, 3A Synchronous Step-Down Voltage Converter  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM43603-Q1 Download Download

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Technical documentation

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User guides (1)
Title Type Size (KB) Date
PDF 1102 22 Sep 2015
Design files (4)
Title Type Size (KB) Date
ZIP 306 22 Sep 2015
PDF 545 22 Sep 2015
PDF 105 22 Sep 2015
PDF 115 22 Sep 2015

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