Automotive Input SEPIC Power Supply Reference Design with Two Isolated Rails
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Key Document


The PMP20550 is a simple design using a SEPIC to produce 3 power rails in which 2 of those are isolated from the input supply. This design is made entirely with automotive qualified IC's and magnetics. The PMP20550 reference design has been designed with optional components to allow the user to adjust output voltage precision as desired.

  • 7 to 16 VDC Input, 5V output at 0.5A, isolated 5V output at 0.2A, isolated 12V output at 0.1A
  • Isolated outputs
  • Utilizes all automotive qualified ICs and magnetics
  • Test report available

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Design Files

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(Output Voltage 1)
(Output Voltage 2)
(Output Voltage 3)
Vin (Min) (V)777
Vin (Max) (V)161616
Vout (Nom) (V)5125
Iout (Max) (A).2.1.2
Output Power (W)11.21
Input TypeDCDCDC
TopologySepic- Integrated SwitchSepic- Integrated SwitchSepic- Integrated Switch

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
TPS55340-Q1  Automotive Integrated, 5-A 40-V Wide Input Range Boost/SEPIC/Flyback DC-DC Regulator  Step-up (boost) regulators  Sample & Buy View Design Kits & Evaluation Modules
TPS799-Q1  Automotive 200-mA, low-IQ, low-dropout voltage regulator with enable  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
TPS55340-Q1 Download Download
TPS799-Q1 Download -
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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 2478 15 Jun 2017
Design files (6)
Title Type Size (KB) Date
ZIP 1303 06 Feb 2017
ZIP 40709 06 Feb 2017
PDF 625 06 Feb 2017
PDF 174 06 Feb 2017
PDF 70 06 Feb 2017
PDF 243 06 Feb 2017

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