Renesas RTKA2108502H00000BU

Overview

RTKA2108502H00000BU from Renesas is an evaluation board for the RAA210850 50A digital DC/DC power module, supporting pin-strap and PMBus configuration, default VOUT = 1.2V at fSW = 421kHz, VIN range 4.5–12V, and continuous 50A output without airflow or heatsink.

For engineers reviewing the RTKA2108502H00000BU datasheet, RTKA2108502H00000BU pinout, RTKA2108502H00000BU application, or RTKA2108502H00000BU equivalent, this page delivers verified board-level specifications, PMBus and pin-strap configuration methods, transient response validation, interleave synchronization capability, and thermal derating guidance for industrial power system design.

Technical Context

The RTKA2108502H00000BU implements a complete test platform for the RAA210850 dual-phase synchronous buck module, featuring ChargeMode™ control (ASCR gain = 200, residual = 90), programmable soft-start/stop (5ms delay/ramp), input UVLO (4.2V), and PMBus address selection via resistor strap (default 28h).

It supports external clock synchronization (e.g., 593kHz), interleave operation across multiple modules using SMBus address–based phase offset (22.5° increments), and full telemetry monitoring of VIN, VOUT, IOUT, temperature, duty cycle, switching frequency, and faults via PowerNavigator™ software and ZLUSBEVAL3Z adapter.

Key Specifications

Availability

RTKA2108502H00000BU is available at Aetrix Electronics and suitable for industrial power system validation, digital PMBus-based power architecture development, and high-current point-of-load converter qualification requiring stable component supply and full design support.

Supply support for RTKA2108502H00000BU 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 is a global semiconductor leader specializing in microcontrollers, analog, power management, and embedded solutions for industrial, automotive, and infrastructure applications.

The RTKA2108502H00000BU belongs to Renesas' digital power evaluation kit family, designed to accelerate adoption of the RAA210850 50A PMBus-enabled power module in high-efficiency, high-density industrial and telecom power systems.

FAQ

What is the primary function of the RTKA2108502H00000BU?

The RTKA2108502H00000BU is an evaluation board for the RAA210850 50A digital DC/DC power module. It enables full functional validation-including pin-strap configuration, PMBus communication, interleave synchronization, transient response testing, and thermal performance assessment-without requiring custom PCB design. The RTKA2108502H00000BU integrates all necessary passives, test points, and interface headers to streamline power system development.

Does the RTKA2108502H00000BU require the ZLUSBEVAL3Z adapter to operate?

No. The RTKA2108502H00000BU operates in pin-strap mode by default (VOUT = 1.2V, fSW = 421kHz, ASCR gain = 200, residual = 90), requiring only a DC input and load. The ZLUSBEVAL3Z USB-to-PMBus adapter and PowerNavigator™ software are optional for advanced configuration, telemetry, and multi-board interleave evaluation-but not needed for basic operation of the RTKA2108502H00000BU.

How is output voltage adjusted on the RTKA2108502H00000BU?

VOUT is adjusted by populating standard 1% 0603 resistors at RVSET_CRS (coarse) and RVSET_FINE (fine) placeholders on the bottom layer. Resistor values are determined from the "Output Voltage Selection" table in the RAA210850 datasheet. By default, VOUT_MAX is set to 110% of the pin-strap–set value. The RTKA2108502H00000BU also supports dynamic VOUT adjustment via PMBus VOUT_COMMAND.

Can multiple RTKA2108502H00000BU boards be synchronized for interleaved operation?

Yes. The RTKA2108502H00000BU supports interleave via external clock synchronization and SMBus address–based phase offset (0°–360° in 22.5° steps). Two or more boards can be daisy-chained using PMBus DONGLE IN/OUT connectors and configured with distinct addresses (e.g., 28h and 24h) to achieve precise phase spreading-reducing input ripple and improving system efficiency without layout changes to the RTKA2108502H00000BU itself.

What thermal performance can be expected from the RTKA2108502H00000BU at full load?

The RTKA2108502H00000BU delivers 50A continuously at room temperature (25°C) with no forced airflow or heatsink, thanks to its 8-layer 2oz copper stack-up, optimized power planes, and thermal vias under SW1/SW2 pads. At elevated ambient temperatures or higher VOUT, current must be derated per the RAA210850 datasheet's θJA curves. Peak junction temperature is monitored via thermocouple insertion into the RAA2108502GLG module during validation.