Automotive Wide Vin Front-End Power Reference Design w/Cold Crank Operation & Transient Protection


Design files


The TIDA-01179 reference design is an automotive front-end power supply that is able to supply 30W maximum output for the 12V car battery. The first stage is a buck-boost DC/DC converter that maintains a stable 15V output voltage over the full DC range of the 12V battery conditions specified in ISO 7637-2 and ISO 16750-2 standards. The second stage is a compact buck converter that enables up to 20W output.

  • Wide-Vin buck-boost converter during very low dips in input voltage of 3V to 36V DC, 42V transient
  • Designed and tested for ISO 7637-2:2004 Pulse 1, 2a and 3a/b severe conditions (level IV)
  • Designed and tested for severe battery-cold-crank operations (ISO16750-2 level III)
  • Tested for CISPR25 conducted EMI (class 5)
  • This circuit design is tested, shippable and includes hardware only
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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.

TIDUC53.PDF (11218 K)

Reference design overview and verified performance test data

TIDRO55.PDF (711 K)

Detailed schematic diagram for design layout and components

TIDRO56.PDF (76 K)

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

TIDRO57.PDF (376 K)

Detailed overview of design layout for component placement

TIDRO59.ZIP (953 K)

Files used for 3D models or 2D drawings of IC components


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

TIDRO58.PDF (2162 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Buck-boost & inverting controllers (external switch)

LM5118-Q13-V to 75-V wide VIN, current mode non-synchronous buck-boost controller

Data sheet: PDF | HTML
Buck converters (integrated switch)

TPS54540-Q142V, 5A, Step-Down Regulator with Integrated High Side MOSFET

Data sheet: PDF | HTML
Ideal diode/ORing controllers

LM74610-Q10.48-V to 42-V, zero IQ automotive ideal diode controller

Data sheet: PDF | HTML
N-channel MOSFETs

CSD18563Q5A60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 6.8 mOhm

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide Auto Wide Vin Front-End Power With Cold Crank Operation Design Guide Oct. 17, 2016

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