RTKA2109252H00000BU Evaluation Board

Pin-Strap Configurable 25A Step-Down PMBus-Compliant DC/DC Power Supply Module

The RAA210925 is a pin-strap configurable dual 25A step-down PMBus-compliant DC/DC power supply module that integrates a digital PWM controller, synchronous MOSFETs, power inductor, and passive components. Only input and output capacitors are needed to finish the design. Because of its thermally-enhanced HDA packaging technology, the module can deliver up to 25A of continuous output current without the need for airflow or additional heat sinking. The RAA210925 simplifies configuration and control of Renesas digital power technology while offering an upgrade path to full PMBus configuration through the pin-compatible ISL8274M.

The RAA210925 comes with a preprogrammed configuration for operating in pin-strap mode. A standard PMBus interface addresses fault management, real-time full telemetry and point-of-load monitoring. Additionally, the RAA210925 uses ChargeMode™ control architecture, which responds to a transient load within a single switching cycle. Operating across an input voltage range from 4.5V to 14V, the RAA210925 offers adjustable output voltage from 0.6V to 5V.

The RTKA2109252H00000BU evaluation board is a 4.0in x 4.5in 8-layer FR4 board with 2oz. copper on top and bottom layer and 1oz. copper in buried layers. This evaluation board comes with a placeholder for pin-strap resistors to adjust output voltage, switching frequency, input undervoltage lockout (UVLO) protection threshold, device PMBus address, overcurrent limit, ASCR setting, and soft-start setting. More configurations can be easily programmed or changed using a PMBus compliant serial bus interface.

The ZLUSBEVAL3Z (USB to PMBus adapter) is provided with this evaluation board, which connects the evaluation board to a PC to activate the PMBus communication interface. The PMBus command set is accessed by using the PowerNavigator™ evaluation software from a PC running Microsoft Windows. The RTKA2109252H00000BU can operate in pin-strap mode without needing the ZLUSBEVAL3Z adapter or PMBus communication.

Key Features

  • VIN range of 4.5V to 14V, VOUT adjustable from 0.6V to 5V. Up to 95.5% efficiency
  • Pin-strap mode for standard settings: VOUT, switching frequency, ASCR setting, input UVLO, soft-start/stop, tracking, and external synchronization
  • Real time telemetry for VIN, VOUT, IOUT, temperature, duty cycle, and switching frequency and fault logging
  • ChargeMode control that is tunable with pin-strap resistors or the PMBus interface
  • Mechanical switch for enable and the power-good LED indicator


  • Server, telecom, storage, and datacom
  • Industrial/ATE and networking equipment
  • General purpose power for ASIC, FPGA, DSP, and memory

PowerNavigator User Guide for POL
Setup and configure a point of load (POL) digital power device using Intersil's PowerNavigator GUI.
PDF 2018年4月10日 4.68 MB
Production Configuration Utility User Guide
User guide for production configuration utility software
PDF 2016年10月29日 714 KB
RAA210925 Datasheet
Pin-Configurable Dual 25A DC/DC Power Module with PMBus Interface
PDF 2019年5月31日 2.93 MB
RTKA2109252H00000BU User Guide
RTKA2109252H00000BU Evaluation Board User Guide
PDF 2018年9月12日 2.02 MB

PowerNavigator Software v5.4.98
Use the PowerNavigator GUI to setup and configure supported digital power devices.
HTML 2018年7月18日 93.4 MB
Production Configuration Utility v5.4.98
Production Configuration Utility software for quick loading and verification of config files into Intersil digital power controller/modules
ZIP 2018年7月18日 99.5 MB
RTKA2109252H00000BU Design Files ZIP 2018年10月10日 1.49 MB

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