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


Design files


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
Output voltage options PMP10735.1
Vin (Min) (V) 6.5
Vin (Max) (V) 35
Vout (Nom) (V) 5
Iout (Max) (A) 3
Output Power (W) 15
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck- Synchronous
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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.

TIDUAO3.PDF (1173 K)

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

TIDRH47.PDF (115 K)

Detailed schematic diagram for design layout and components

TIDRH48.PDF (105 K)

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


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

TIDRH49.PDF (545 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Buck converters (integrated switch)

LM43603-Q1Automotive Qualified 3.5V to 36V, 3A Synchronous Step-Down Voltage Converter

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Test report PMP10735 Test Results Sep. 22, 2015
Technical article Overcoming automotive cluster power supply design challenges Nov. 13, 2015

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