Renesas RTKA212831DR0000BU

Overview

RTKA212831DR0000BU from Renesas Electronics is a demonstration board designed to evaluate the RAA212831 integrated power management IC - a 72V-input synchronous buck regulator (500mA) with dual fixed-output LDOs (5V/100mA and 3.3V/50mA). It operates across 14V–72V input, delivers fixed 6V or 12V buck output (selectable via EXTFB), and supports e-bike control board development with minimal external components.

For engineers reviewing the RTKA212831DR0000BU datasheet, RTKA212831DR0000BU pinout, RTKA212831DR0000BU application, or RTKA212831DR0000BU equivalent, this board provides validated reference design, thermal layout guidance, and performance graphs for buck/LDO load regulation, efficiency, ripple, transient response, and fault behavior under real operating conditions.

Technical Context

The RTKA212831DR0000BU implements the RAA212831 IC in a functionally optimized PSOP-8E layout, supporting peak current-mode buck control at fixed 350kHz switching frequency. The board integrates discrete MOSFET (SI2342DS), Schottky diode (B180-13-F), and 120µH power inductor (Wurth 74404084121) to demonstrate full-system operation up to 0.5A load.

It enables evaluation of both normal mode (buck output = 12V) and standby mode (buck output = 6V) via EXTFB test point, while independently powering downstream 5V and 3.3V rails with verified LDO load regulation, PSRR, OCP foldback, and UVP hiccup protection - all measured per Renesas' published test conditions (VIN = 56V, TA = +25°C).

Key Specifications

Availability

RTKA212831DR0000BU is available at Aetrix Electronics and suitable for e-bike controller validation, industrial 24–72V power rail prototyping, and embedded system LDO integration testing requiring stable component supply and production-ready reference design fidelity.

Supply support for RTKA212831DR0000BU 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 specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT applications.

The RTKA212831DR0000BU belongs to Renesas' power management demonstration platform family, engineered specifically to accelerate adoption of the RAA212831 for compact, high-integration electric mobility control boards.

FAQ

What is the primary purpose of the RTKA212831DR0000BU?

The RTKA212831DR0000BU is a Renesas-provided demonstration board used exclusively to evaluate the RAA212831 integrated power management IC. It validates the buck regulator's 14V–72V operation, 6V/12V selectable output, and dual LDO performance (5V/100mA and 3.3V/50mA) in a production-relevant layout with thermal and EMI considerations confirmed in the manual. RTKA212831DR0000BU itself is not a component but a hardware reference platform.

Does the RTKA212831DR0000BU include the RAA212831 IC?

Yes, the RTKA212831DR0000BU board includes one RAA212831GSP#AA0 IC in PSOP-8E package (U1 on schematic), which is the core device under evaluation. All performance data - including load regulation, efficiency, ripple, and transient response - published in the manual (R16UZ0022EU0102) corresponds directly to measurements taken using the RTKA212831DR0000BU with this specific IC installed.

How is buck output voltage selected on the RTKA212831DR0000BU?

Buck output voltage on the RTKA212831DR0000BU is selected via the EXTFB test point: logic high yields 12V output, logic low yields 6V output. This external control signal allows users to verify the RAA212831's standby mode functionality without modifying feedback resistors. The board's schematic (Figure 5) shows EXTFB routed to pin 9 of U1 (RAA212831), confirming direct interface with the IC's standby control input.

Can the RTKA212831DR0000BU be used for long-term system integration?

No - the RTKA212831DR0000BU is a demonstration board intended for evaluation and reference design validation only. It is not qualified for continuous field operation or end-product integration. Its layout, component selection (e.g., generic 0603 resistors, non-automotive-grade capacitors), and lack of conformal coating or environmental qualification mean it serves strictly as a development aid for designing custom PCBs based on the RAA212831. RTKA212831DR0000BU must not be deployed in production systems.

Where can I find the schematic and bill of materials for the RTKA212831DR0000BU?

The complete schematic diagram (Figure 5), bill of materials (Section 2.3), top/bottom PCB layouts (Figures 6–7), and component placement guidelines are provided in the official Renesas Demonstration Board Manual R16UZ0022EU0102 (Rev. 1.02, March 2023). This document is publicly available on the Renesas website and includes part numbers for all components - including U1 (RAA212831GSP#AA0), L1 (Wurth 74404084121), and D1 (Diodes B180-13-F) - referenced on the RTKA212831DR0000BU board.