PMP9474 Reference Design

Texas Instruments

Fly-Buck Bias Solution for MCU and RS-485


The PMP9474 reference design is Fly-Buck solution: with two outputs: one non-isolated power supply: 3.3V@300mA: for MCU: one isolated power supply: 5V@100mA: for RS-485. The most important feature of this design is ultra compact solution size: which is only 26mmx14.5mm. The design uses the LM5017 synchronous buck converter configured as a Fly-Buck regulator. With the benefit of primary side regulation: the supply has the output regulated without the opto-coupler or additional transformer winding. The LM5017 has a wide Vin range which is up to 100V and 600mA output current capability with integrated switch FETs. The input voltage to the reference board can be loosely regulated with a range of 18V to 36V.

  • One non-isolated 3.3V output: one isolated 5V output;Fly-Buck converter design;Ultra compact size: only 26mm x 14.5mm;83% peak efficiency.LM5017 sync buck regulator: up to 100V wide Vin range: 600mA capabilityThis circuit board is tested: and the design files and test report are included.
  • Robot teach pendant (HMI)
  • HMI panel
Product Categories
  • Power management


Part Number Name Companion Part
LM5017 LM5017 Buy Datasheet

Bill Of Materials

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Design File

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Test Data

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Other Documents

Title Updated Type Size (KB)
PMP9474 Gerber 02 Mar 2015 ZIP 84
PMP9474 BOM 02 Mar 2015 PDF 27
PMP9474 Schematic 02 Mar 2015 PDF 111