Dual 5V Output USB Charging Reference Design Using Two LMR23630 DC/DC Synchronous Buck Converters


Design files


The PMP10745 is a dual output DC/DC Buck converter power supply reference design for USB charging applications. It takes a 7V to 36V input voltage, and generates two 5V at 3A outputs with 96% peak efficiency. The reference design features two LMR23630 buck converters to provide two very stable and well-regulated outputs. The board dimension is 66 x 58 mm (2.6 x 2.3 inch), but the solution size is 46 x 38 mm (1.8 x 1.5 inch). The reference design uses an EMI filter at the input and the board is layout-optimized for improved EMI performance, which results in compliance with the CISPR 25 Class 5 conducted emissions standard.

  • Input: 7V to 36V
  • Output: 5V @ 3A, 5V @ 3A
  • Peak efficiency 96%
  • EMI CISPR 25 Class 5
  • Compact solution size, 1.8 x 1.5 inch
Output voltage options PMP10745.1
Vin (Min) (V) 7
Vin (Max) (V) 36
Vout (Nom) (V) 5
Iout (Max) (A) 3
Output Power (W) 15
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck

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.

TIDUBR0.PDF (1407 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

TIDCC40.ZIP (340 K)

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


Includes TI products in the design and potential alternatives.

Buck converters (integrated switch)

LMR23630SIMPLE SWITCHER®, 36V 3A Synchronous Step-Down Converter

Data sheet document-pdfAcrobat PDF

Technical documentation

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Type Title Date
* Test report PMP10745 Test Results Apr. 22, 2016

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