Reference Design - SEPIC Converter Delivers 3.3V at 3.25A from Low Input Voltage


Design files


This coupled-inductor, 3.3V at 3.25A, SEPIC converter delivers high current in a compact area. This circuit is optimized for input voltages within 3.0V - 3.6V. It is also suitable for battery application.

  • SEPIC converter
  • Greater than 10W output
  • Board length is approximately 47 mm
  • Efficiency approaches 86% at 1A
  • Test report available
Output voltage options PMP9512.1
Vin (Min) (V) 3.33
Vin (Max) (V) 3.6
Vout (Nom) (V) 3.3
Iout (Max) (A) 3.25
Output Power (W) 10.725
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Sepic- Synchronous
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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.

TIDU925.PDF (1883 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

TIDCA54.ZIP (176 K)

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


Includes TI products in the design and potential alternatives.

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

LM34812.97V to 48V High-Efficiency Controller for Boost, SEPIC and Flyback

Data sheet: PDF | HTML

CSD16323Q325-V, N channel NexFET™ power MOSFET, single SON 3 mm x 3 mm, 5.5 mOhm

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Test report PMP9512 Test Results Apr. 14, 2015

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