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

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Design Files

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(Output Voltage 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
Input TypeDC
TopologySepic- Synchronous

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD16323Q3  25-V, N channel NexFET™ power MOSFET, single SON 3 mm x 3 mm, 5.5 mOhm  MOSFETs  Sample & Buy Not Available
LM3481  2.97V to 48V High-Efficiency Controller for Boost, SEPIC and Flyback  Step-up (boost) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD16323Q3 VSON-CLIP (DQG)| 8 Download Download
LM3481 Download Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 1816 14 Apr 2015
Design files (3)
Title Type Size (KB) Date
ZIP 176 14 Apr 2015
PDF 13 14 Apr 2015
PDF 95 14 Apr 2015

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