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REF66009 - Reference Design

LogiCoA™ Solution BUCK Converter (12V Input, 5V Output, 25W)

LogiCoA001-EVK-001 is a reference design for a BUCK converter that uses ROHM's analog-digital fusion control technology LogiCoA™, which includes a microcontroller ML62Q2035 suitable for LogiCoA™, a 100V gate driver BD2320EFJ-LA, LDO BD950N1WG-C, BD900N1WG-C, operational amplifier BU7481SG, and shunt resistor LTR100LJZPFSR020. Design data, sample software, and an operating system for power supply control are available for this reference design, as well as a reference board. We hope that you will have a chance to experience the analog-digital fusion control LogiCoA™ and make use of it in your future power supply device development.

Reference Program

We offer a reference program comprising an OS for power control and firmware for BUCK converter control. Additionally, we provide a communication GUI that allows communication from a Windows PC. Please utilize these as design references. For inquiries regarding the provision of these, please contact us via the inquiry form on our website.

  • Reference Program: LogiCoA™ Solutions Buck Converter Reference Program
  • Communication GUI (Excel file): LogiCoA™ Solution Back Converter Communication GUI


About the LogiCoA™ Brand

LogiCoA™ is the brand granted to the design philosophy of integrating digital elements to maximize the performance of analog circuitry. By fusing the merits of analog circuits with digital control, it brings out the full potential of circuit topology and contributes to higher efficiency of power utilization. ROHM thinks that this LogiCoA™ can be applied not only to the power supply field but also to the overall power solution as. We are looking at future applications for products and solutions.
LogiCoA™ is a trademark or registered trademark of ROHM Co., Ltd.

Design Resources



Board Number Input Voltage Range Output Voltage Maximum Output Current Switching Frequency Maximum Duty
LogiCoA001-EVK-001 7.5 - 38.0V 5V 5A 160kHz 80%

Distribution Inventory

Board Number Distributor Quantity Available
LogiCoA001-EVK-001 - -

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
LogiCoA001-EVK-001 BD2320EFJ-LA Gate Drivers - Active - - -
LogiCoA001-EVK-001 BU7481SG Operational Amplifiers - Recommended - - -
LogiCoA001-EVK-001 LTR100LJZPFS Current Detection Resistors - Recommended -
LogiCoA001-EVK-001 BD900N1WG-C Linear Regulators - Recommended - - -
LogiCoA001-EVK-001 BD950N1WG-C Linear Regulators - Recommended - - Solution Simulator
LogiCoA001-EVK-001 ML62Q2035-NNNTD(Taping) LogiCoA™ MCUs - Recommended -
LogiCoA001-EVK-001 ML62Q2035-NNNTD(Tray) LogiCoA™ MCUs - Recommended -