Renesas RTKA2109252H00000BU

Overview

RTKA2109252H00000BU from Renesas is an evaluation board for the RAA210925 dual 25A digital PMBus-compliant DC/DC power module, preconfigured for 1.5V output at 889kHz switching frequency across 5–12V input, supporting pin-strap and PMBus configuration modes with real-time telemetry and ChargeMode™ transient response.

For engineers reviewing the RTKA2109252H00000BU datasheet, RTKA2109252H00000BU pinout, RTKA2109252H00000BU application, or RTKA2109252H00000BU equivalent, this board enables rapid validation of dual-channel point-of-load power delivery, interleave operation, voltage tracking, external clock synchronization, and thermal performance up to 25A per channel without forced airflow.

Technical Context

The RTKA2109252H00000BU implements a complete test platform for the RAA210925 module, integrating dual-phase synchronous buck regulation with ChargeMode™ control architecture, PMBus v1.3 interface, and pin-strap resistor placeholders for VOUT, fSW, UVLO, ASCR gain/residual, soft-start, and SMBus address configuration.

It supports both standalone pin-strap operation and full PMBus-based programming via ZLUSBEVAL3Z USB adapter and PowerNavigator™ software, enabling real-time monitoring of VIN, VOUT, IOUT, temperature, duty cycle, and fault logging - all while delivering up to 95.5% peak efficiency across 0.6–5V adjustable output range.

Key Specifications

Availability

RTKA2109252H00000BU is available at Aetrix Electronics and suitable for industrial embedded power validation, FPGA/ASIC multi-rail sequencing, high-density server PoL development, and digital power design verification requiring stable component supply and full-feature evaluation capability.

Supply support for RTKA2109252H00000BU includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics Corporation is a global semiconductor manufacturer specializing in microcontrollers, analog power devices, and embedded solutions for industrial, automotive, and infrastructure applications.

The RTKA2109252H00000BU belongs to Renesas' Industrial Analog and Power evaluation board portfolio, designed to accelerate adoption of the RAA210925 digital power module family in high-current, high-efficiency point-of-load systems.

FAQ

What is the primary function of the RTKA2109252H00000BU evaluation board?

The RTKA2109252H00000BU evaluation board is a dedicated hardware platform for evaluating the RAA210925 dual 25A digital DC/DC power module. It provides full access to pin-strap configuration, PMBus communication via ZLUSBEVAL3Z, real-time telemetry, interleave operation, voltage tracking, and transient load testing - enabling comprehensive validation of the module's performance in real-world power delivery scenarios.

Does the RTKA2109252H00000BU require the ZLUSBEVAL3Z adapter to operate?

No, the RTKA2109252H00000BU can operate in pin-strap mode without the ZLUSBEVAL3Z adapter or any PMBus connection. By default, it is preconfigured for 1.5V output at 889kHz using onboard resistors. The ZLUSBEVAL3Z and PowerNavigator™ software are only required for full PMBus-based configuration, telemetry monitoring, and advanced features like interleave setup or dynamic parameter adjustment.

What are the key thermal limitations of the RTKA2109252H00000BU board?

The RTKA2109252H00000BU is validated for 25A per channel continuous operation at room temperature without forced airflow or heatsinking. However, output current must be derated at elevated ambient temperatures or higher output voltages. Thermal performance depends heavily on PCB layout - including copper weight, trace width, and thermal via placement - as specified in the RAA210925 datasheet and UG182 layout guidelines.

Can the RTKA2109252H00000BU support voltage tracking between its two channels?

Yes, the RTKA2109252H00000BU fully supports voltage tracking using the RAA210925's integrated tracking function. Channel 2 (VOUT2) can track Channel 1 (VOUT1) by connecting VOUT1 to VTRKP and GND to VTRKN via zero-ohm resistors, setting appropriate VSET_FINE resistors, and enabling channels in sequence. This enables safe, synchronized power-up for FPGAs and ASICs requiring strict rail sequencing.

How is external clock synchronization implemented on the RTKA2109252H00000BU?

External clock synchronization on the RTKA2109252H00000BU is achieved by connecting a stable square-wave signal (≥150 ns pulse width, ±10% frequency tolerance) to the SYNC/OCP test point (TP3). A 17.8 kΩ resistor must be soldered at R5 (CFG pin) to enable sync mode. The board then locks to the external clock, allowing precise phase alignment across multiple modules for improved EMI and reduced input ripple.