The RAA210870 is a pin-strap configurable 70A 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 70A of continuous output current without the need for airflow or additional heat sinking. The RAA210870 uses ChargeModeTM control (ASCR) architecture, which responds to a transient load within a single switching cycle.

The RTKA2108702H00000BU evaluation board is a 4. 7in x 4. 8in 8-layer FR4 board with 2oz. copper on all layers. This evaluation board comes with placeholders for pin-strap resistor population to adjust output voltage, switching frequency, soft-start/stop timing, input UVLO threshold, ASCR gain and residual parameters, and device PMBus address. Fault limits can be easily programmed or changed using a PMBus-compliant serial bus interface.

The optional 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 PowerNavigatorTM evaluation software from a PC running Microsoft Windows. The RTKA2108702H00000BU can operate in pin-strap mode without needing the ZLUSBEVAL3Z adapter or PMBus communication.


The PowerCompassTM tool helps you start your design in the right direction, giving you tools to find Renesas parts that match your requirements, set up multiple rails if needed, perform high-level system analysis and generate reference design files.

Find Parts


  • VIN range of 4.5V to 14V, VOUT adjustable from 0.6V to 2.5V
  • Programmable VOUT, input and output UVP/OVP, OTP/UTP, soft-start/stop, and external synchronization
  • Monitor: VIN, VOUT, IOUT, temperature, duty cycle, switching frequency, and faults
  • ChargeMode control tunable with PMBus
  • Mechanical switch for enable and power-good LED indicator


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

tuneProduct Options

Part Number Part Status Buy Sample


Title language Type Format File Size Date
Datasheets & Errata
RAA210850 Datasheet Datasheet PDF 2.41 MB
RAA210870 Datasheet 日本語, 简体中文 Datasheet PDF 2.63 MB
RAA210833 Datasheet Datasheet PDF 2.69 MB
RAA210925 Datasheet Datasheet PDF 2.93 MB
User Guides & Manuals
star RTKA2108702H00000BU User Guide Manual - Development Tools PDF 1.64 MB
PowerNavigator User Guide for POL Guide PDF 4.68 MB
RTKA2109252H00000BU User Guide Manual - Development Tools PDF 2.02 MB
RTKA2108332H00000BU User Guide Manual - Development Tools PDF 1.35 MB
RTKA2108502H00000BU User Guide Manual - Development Tools PDF 1.79 MB
Production Configuration Utility User Guide Guide PDF 714 KB


Title language Type Format File Size Date
PowerNavigator™ Software v5.4.139 Software & Tools - Software ZIP 96.49 MB
Production Configuration Utility v5.4.139 Software & Tools - Other ZIP 120.25 MB
RTKA2109252H00000BU Design Files PCB Design Files ZIP 1.49 MB
RTKA2108332H00000BU Design Files PCB Design Files ZIP 1005 KB
RTKA2108502H00000BU Design Files PCB Design Files ZIP 2.23 MB
RTKA2108702H00000BU Design Files PCB Design Files ZIP 2.44 MB