Interleaved and multiphase inverting buck-boost converter reference design


Design files


This reference design uses the UCD3138064A as a digital controller to control inverting buck-boost with the capability of supporting two-phase peak current mode control. The soft-switching technology is used in this design to improve the power efficiency. The input voltage range is -62 V to -36 V. The output voltage range is adjustable from 28 V to 52 V. The default output voltage is 48-V with a maximum current of 14 A.

  • High efficiency above 97.1%
  • Interleaved two-phase peak current mode (PCM) control
  • Three phases with voltage mode (VM) control
  • Zero voltage switching of MOSFETs
  • Pre-biased start up
  • Current balancing between phases
Output voltage options PMP23332.1
Vin (Min) (V) -62
Vin (Max) (V) -36
Vout (Nom) (V) 48
Iout (Max) (A) 2.56
Output Power (W) 122.88
Isolated/Non-Isolated Isolated
Input Type DC
Topology Buck Boost- Inverting
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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.

TIDT323.PDF (3521 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

TIDMBG7.PDF (2965 K)

Detailed overview of design layout for component placement

TIDMBG9.ZIP (3445 K)

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

TIDCGE2.ZIP (8191 K)

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

TIDMBG8.PDF (23930 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

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Linear & low-dropout (LDO) regulators

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Technical documentation

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Type Title Date
Test report Interleaved and Multiphase Inverting Buck-Boost Converter Reference Design PDF | HTML Jun. 20, 2023

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