Renesas RTKA211820DE0000BU

Overview

RTKA211820DE0000BU from Renesas Electronics is an evaluation board designed to demonstrate and rapidly assess the RAA211820 QFN-packaged synchronous buck DC/DC regulator, supporting 4.5V–75V input, delivering 3.3V/2A output with programmable switching frequency and premium line/load regulation performance in industrial power supply validation.

For engineers reviewing the RTKA211820DE0000BU datasheet, RTKA211820DE0000BU pinout, RTKA211820DE0000BU application, or RTKA211820DE0000BU equivalent, this board enables hands-on evaluation of high-voltage buck conversion, layout reference verification, EN-controlled startup/shutdown timing, and load transient response under real-world conditions.

Technical Context

The RTKA211820DE0000BU implements a fixed 3.3V output configuration using R9 (62 kΩ) and R10 (20 kΩ) feedback resistors per Equation 1, directly interfacing with the RAA211820GNP#HA0 IC's FB pin. It supports full-input-range operation (4.5V–75V VIN) and delivers up to 2A continuous current with measured efficiency exceeding 90% at 12V input and 1A load.

Board-level features include JP1 for VIN-to-EN shorting, test points (TP1–TP4) for SW, VOUT, EN, and PG monitoring, and a 10 µH power inductor (Wurth 74439346100) optimized for low ripple and thermal performance. The design follows Renesas' recommended layout guidelines for high-voltage synchronous buck converters.

Key Specifications

Availability

RTKA211820DE0000BU is available at Aetrix Electronics and suitable for industrial power supply validation, high-voltage DC/DC reference design development, and automotive-grade buck converter qualification requiring stable component supply and traceable evaluation hardware.

Supply support for RTKA211820DE0000BU 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 headquartered in Tokyo, Japan, specializing in microcontrollers, analog & power devices, and SoC solutions for automotive, industrial, and infrastructure markets.

The RTKA211820DE0000BU belongs to Renesas' Power Management Evaluation Board family, engineered to accelerate adoption of high-input-voltage synchronous buck regulators in ruggedized power systems where reliability, layout fidelity, and rapid prototyping are critical.

FAQ

What is the primary function of the RTKA211820DE0000BU evaluation board?

The RTKA211820DE0000BU evaluation board is a ready-to-use platform for evaluating the RAA211820 synchronous buck regulator. It provides a validated layout, pre-configured 3.3V output, and accessible test points to measure efficiency, load regulation, startup behavior, and transient response-enabling rapid validation of the RTKA211820DE0000BU's target IC in real-world high-voltage applications.

Does the RTKA211820DE0000BU support adjustable output voltage?

Yes, the RTKA211820DE0000BU supports adjustable output voltage via the feedback resistor network (R9 and R10). The default 3.3V setting follows Equation 1 in the manual; replacing R9 allows reconfiguration to other voltages while maintaining compatibility with the RAA211820's 0.8V reference. The board includes solder pads and documentation for safe modification.

Can the RTKA211820DE0000BU be used with input voltages above 48V?

Yes, the RTKA211820DE0000BU is fully rated for input voltages up to 75V, as confirmed in its operational characteristics and performance graphs (e.g., Figure 10 shows efficiency data at VIN = 76V). All components-including the 100V-rated input/output capacitors and RAA211820GNP#HA0 IC-are selected to sustain reliable operation across the full 4.5V–75V range.

How is enable functionality implemented on the RTKA211820DE0000BU?

The RTKA211820DE0000BU implements enable control via jumper JP1, which shorts VIN to the EN pin of the RAA211820. This provides immediate, supply-synchronized startup. For active control, JP1 can be removed and an external logic signal applied to the EN pad, enabling precise sequencing in multi-rail systems-verified in Figures 14 and 15 of the manual.

What layout resources accompany the RTKA211820DE0000BU?

The RTKA211820DE0000BU includes full Gerber files (top/bottom layers, internal planes), a detailed schematic (Figure 5), bill of materials with manufacturer part numbers, and explicit layout guidelines referencing the RAA211820 datasheet. These resources serve as a production-ready reference for high-voltage buck converter PCB design, including thermal pad routing and high-current trace practices.