0.65W Low Power Isolated Flybuck Converter Bias Supply Reference Design
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Key Document


PMP12003 is an isolated fly-buck-boost converter reference design with the primary side configured as an inverting buck-boost, using the LM5017 synchronous buck regulator IC. The design accepts an input voltage of 9Vin to 15Vin and provides an isolated output of 6.5Vout (+/-0.5V), capable of supplying 100mA of continuous current to the load. The nominal switching frequency of the design is 215KHz. This design is built on the PMP9291 Rev4 PCB, which is a 4-layer board with 1 oz. copper for the top and bottom layers and 0.5 oz. copper for the two inner layers.

  • Primary-to-secondary isolation
  • Simple COT design requires no compensation
  • No need for optocoupler
  • Cycle-by-cycle current limit

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(Output Voltage 1)
Vin (Min) (V)9
Vin (Max) (V)15
Vout (Nom) (V)6.5
Iout (Max) (A).1
Output Power (W).65
Input TypeDC

TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM5017  7.5-100V Wide Vin, 600mA Constant On-Time Synchronous Buck Regulator  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM5017 Download Download
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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 859 06 Dec 2017
Design files (6)
Title Type Size (KB) Date
ZIP 228 06 Dec 2017
ZIP 389 06 Dec 2017
PDF 453 06 Dec 2017
PDF 77 06 Dec 2017
PDF 96 06 Dec 2017
PDF 150 06 Dec 2017

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