Quarter Brick Dual Phase Synchronous Buck Converter Automotive Reference Design


Design files


PMP20659 is a dual-phase synchronous buck converter reference design utilizing the LM25119-Q1 dual synchronous buck controller I.C. The design accepts an input voltage of 4.5V to 40V and provides a 5V output capable of supplying 45A of current to the load. This represents a power density design of 225W in a quarter brick footprint. The maximum component height is set by the Coilcraft XAL1510-472 inductors at 0.394 in.

  • Emulated peak current-mode control
  • High power density
  • Low dropout voltage
  • Wide input voltage range
  • Standard quarter brick footprint
Output voltage options PMP20659.1
Vin (Min) (V) 4.5
Vin (Max) (V) 40
Vout (Nom) (V) 5
Iout (Max) (A) 45
Output Power (W) 225
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck- Multiphase
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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.

TIDUDZ9.PDF (1800 K)

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


Detailed schematic diagram for design layout and components


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


Detailed overview of design layout for component placement


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

TIDCE76.ZIP (236 K)

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


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

AC/DC & DC/DC controllers (external FET)

LM25119QAutomotive grade 4.5-42V wide VIN, current mode dual synchronous buck controller

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Test report PMP20659 Test Results Dec. 08, 2017

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