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REFPTR001 - Reference Design

Power Management Reference design for Xilinx FPGA Spartan-7 platform

ROHM, together with Avnet, a leading supplier of electronic products and embedded solutions, developed a reference power supply optimized for Xilinx’s FPGA Spartan-7. In recent years, FPGA power supplies are increasingly demanding high accuracy low voltage, complicated startup sequences. At the same time, designers are constantly faced with the need to upgrade their designs to feature smaller form factors, greater energy savings, and lower costs, which are difficult to achieve within a short period. In response, ROHM offers an optimized power supply reference design for FPGA power supplies that allows designers to reduce development load while meeting market demands. The Spartan-7 (which this reference design was developed for) is ideal for industrial and consumer applications that leverage connectivity with sensor fusion and embedded vision. ROHM’s reference power supply design consists of a verified power supply that safely starts and operates Xilinx’s Spartan-7. This reference power supply includes the BD95602MUV power supply IC that delivers superior response characteristics, along with the BD9B305QUZ, BD9F500QUZ, and BD9F800MUZ designed to provide the current capability demanded for each power supply as well as the BD35395EFJ-M DDR3L termination power supply, making it possible to generate supply voltages that meet FPGA voltage accuracy specifications from 12V input while also supporting the necessary startup sequence. Reference design materials including circuit diagrams, BOMs, and board layouts are available for download.

  • industrial and consumer applications that leverage connectivity with sensor fusion and embedded vision.
  • 6channels power tree reference design
  • developing 12V input power tree for Xilinx FPGA Spartan-7 together with Avnet



Part No. Vin
Io Max.
(WxLxH mm)
BD95602MUV 5.5 to 28.0 Ext. 0.15 to 0.50 VQFN032V5050
FET (5.0x5.0x1.0)
BD9F500QUZ 4.5 to 36.0 5.0 0.60 / 1.00 / 2.20 VMMP16LZ3030
BD9F800MUX-Z 4.5 to 28.0 8.0 0.30 / 0.60 VQFN11X3535A
BD9B305QUZ 2.7 to 5.5 3.0 1 VMMP08LZ2020
BD35395FJ-M 2.7 to 5.5 ±1.0 - SOP-J8

Design Resources



Board Number Input Voltage Output Channel Output Voltage Size
REFPTR001-DMO-001 12V 6-channels 5.0V/2.5V /1.8V/1.35V/1.0V/0.675V 120mm x 100mm

Distribution Inventory

Board Number Distributor Quantity Available

Key Components

Board Number Part Number Product Category Datasheet Status SPICE LTspice® ? Thermal Model Symbol & Footprint 3D STEP Samacsys ECAD Library Calc Tool ROHM Solution Simulator
REFPTR001-DMO-001 BD95602MUV-LB DC-DC Converter ICs - Active - -
REFPTR001-DMO-001 BD9F800MUX-Z DC-DC Converter ICs - Recommended - - - Solution Simulator
REFPTR001-DMO-001 BD9F500QUZ DC-DC Converter ICs - Recommended - - - Solution Simulator
REFPTR001-DMO-001 BD9B305QUZ DC-DC Converter ICs - Recommended - - -
REFPTR001-DMO-001 BD35395FJ-M Linear Regulators - Recommended - - -