Renesas RTKA2108252H00000BU

Overview

RTKA2108252H00000BU from Renesas Electronics is an evaluation board for the RAA210825 25A digital PMBus-compliant DC/DC power supply module, preconfigured for VOUT = 1.2V and fSW = 364kHz operation across VIN = 5–12V. It integrates a thermally enhanced HDA-packaged power module with pin-strap configuration, real-time telemetry, and ChargeMode™ control - enabling rapid validation of industrial point-of-load power delivery in embedded and server applications.

For engineers reviewing the RTKA2108252H00000BU datasheet, RTKA2108252H00000BU pinout, RTKA2108252H00000BU application, or RTKA2108252H00000BU equivalent, this page delivers verified board-level specifications, PMBus and pin-strap configuration workflows, thermal layout guidance, bode plot measurement methodology, and interleave synchronization setup - all grounded in the UG180 Rev.0.00 User's Manual and confirmed component bill-of-materials.

Technical Context

The RTKA2108252H00000BU implements full hardware and software evaluation capability for the RAA210825 module, supporting both pin-strap (resistor-programmed) and PMBus-based configuration. It provides access to real-time telemetry including VIN, VOUT, IOUT, temperature, duty cycle, and fault logging, with ChargeMode™ control tunable via either interface.

Board-level features include external clock synchronization (via SYNC test point), bode plot measurement support (via feedback loop break at R9), and interleave phase spreading (via SMBus address selection). The 4-layer FR4 PCB uses 2oz copper, separate SGND/PGND planes, and optimized thermal copper mass under VSWH and power pads to sustain 25A continuous output at room temperature without forced airflow.

Key Specifications

Availability

RTKA2108252H00000BU is available at Aetrix Electronics and suitable for industrial power system validation, server point-of-load prototyping, and embedded DC/DC design verification requiring stable component supply, traceable sourcing, and long-term lifecycle support.

Supply support for RTKA2108252H00000BU 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 leader delivering high-performance analog, power, and embedded processing solutions for industrial, automotive, and datacenter applications.

The RTKA2108252H00000BU belongs to Renesas' Industrial Analog and Power evaluation platform family, designed specifically to accelerate development and validation of digital PMBus power modules in high-current, thermally constrained environments.

FAQ

What is the primary function of the RTKA2108252H00000BU?

The RTKA2108252H00000BU is a dedicated evaluation board for the RAA210825 25A digital DC/DC power module. It enables hardware validation of pin-strap configuration, PMBus communication, real-time telemetry, thermal performance, and advanced features like external clock sync and interleave operation - all using the preprogrammed RAA2108252GLG#AG0 module onboard the RTKA2108252H00000BU.

Does the RTKA2108252H00000BU require the ZLUSBEVAL3Z adapter to operate?

No - the RTKA2108252H00000BU operates in pin-strap mode by default and can regulate at VOUT = 1.2V and fSW = 364kHz without the ZLUSBEVAL3Z adapter or any PMBus connection. The adapter is only required when accessing full PMBus programmability, real-time telemetry monitoring, or advanced debug features via PowerNavigator software on the RTKA2108252H00000BU.

What are the key thermal design features of the RTKA2108252H00000BU board?

The RTKA2108252H00000BU uses 2oz copper on all four layers, separates SGND and PGND planes connected only in the inner layer, places multiple vias under high-current pads (VIN, VOUT, VSWH), and maximizes copper mass under the VSWH node to dissipate heat. These features allow 25A continuous operation at room temperature without airflow - as validated in UG180 Rev.0.00 for the RTKA2108252H00000BU.

Can the RTKA2108252H00000BU be used to measure bode plots?

Yes - the RTKA2108252H00000BU supports bode plot measurement via a defined loop-break method: remove R9 (between VSEN+ and VOUT), solder a 20Ω resistor in its place, and inject a 20mV AC signal across it using a network analyzer. This procedure, detailed on page 6 of UG180, enables accurate gain/phase margin assessment of the RAA210825 control loop on the RTKA2108252H00000BU.

How does interleave operation work on the RTKA2108252H00000BU?

Interleave operation on the RTKA2108252H00000BU is achieved by synchronizing multiple RAA210825 modules to the same external clock and assigning unique PMBus addresses (e.g., 0x28h and 0x24h) to set phase offsets in 22.5° increments. The RTKA2108252H00000BU supports daisy-chained PMBus connections and SYNC signal routing - allowing users to verify phase spread between modules using oscilloscope measurements at TP8 (VSWH) on each RTKA2108252H00000BU board.