USB Type-C® dual-buck reference design


Design files


This reference design is a USB Type-C® dual-output buck with 65-W output power and 98.8% efficiency. The design uses two LM61460 buck converters to step down a 21-V input and includes a 5-V bias voltage input to maximize efficiency. The USB Type-C design offers dual-output voltages of 5 V, 9 V, 15 V, 20 V and was tested using the PMP22426 daughter card. PMP22426 uses the TPS25740B, USB Type-C power delivery controller, to control each output seperately. 

  • Two buck converters for dual-port USB Type-C power delivery
  • 98.8% maximum efficiency at 20-V output
  • Includes a socket for custom USB power delivery control cards
  • Compact, single-side PCB
Output voltage options PMP22416.1 PMP22416.2
Vin (Min) (V) 20.5 20.5
Vin (Max) (V) 21.5 21.5
Vout (Nom) (V) 20 20
Iout (Max) (A) 3 3
Output Power (W) 60 60
Isolated/Non-Isolated Non-Isolated Non-Isolated
Input Type DC DC
Topology Buck- Synchronous Buck- Synchronous

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.

TIDT199.PDF (5552 K)

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

TIDM779.PDF (300 K)

Detailed schematic diagram for design layout and components

TIDM780.PDF (127 K)

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

TIDM781.PDF (257 K)

Detailed overview of design layout for component placement

TIDM783.ZIP (1312 K)

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


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

TIDM782.PDF (1044 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Buck converters (integrated switch)

LM614603-V to 36-V, 6-A, Low-EMI synchronous step-down converter

Data sheet document-pdfAcrobat PDF open-in-new HTML
Buck converters (integrated switch)

LM61460-Q1Automotive 3-V to 36-V, 6-A, low-noise synchronous step-down converter

Data sheet document-pdfAcrobat PDF open-in-new HTML
ESD & surge protection ICs

TPD1E05U06-Q1Automotive 0.4pF 5.5V, ±12-kV ESD protection diode in 0402 package with for USB 3.0

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
* Test report USB Type-C® Dual-Buck Reference Design Jan. 05, 2021

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