Renesas RTKA211450DE0000BU

Overview

RTKA211450DE0000BU from Renesas Electronics is an evaluation board designed to validate the RAA211450GNP#HA0 QFN-packaged synchronous buck regulator, supporting 4.5V–42V input, delivering 3.3V/5A output with integrated 70mΩ high-side and 30mΩ low-side MOSFETs, and enabling programmable switching frequency for industrial power supply design.

For engineers reviewing the RTKA211450DE0000BU datasheet, RTKA211450DE0000BU pinout, RTKA211450DE0000BU application, or RTKA211450DE0000BU equivalent, this board provides verified layout guidelines, full schematic documentation, performance graphs (efficiency, load regulation, ripple), and configurable feedback network for rapid DC/DC validation.

Technical Context

The RTKA211450DE0000BU implements a complete reference design for the RAA211450 - a current-mode synchronous step-down controller with internal power FETs, fixed 3.3V output (adjustable via R9/R10), and integrated bootstrap circuitry (BST pin). It supports EN-controlled startup, PG status monitoring, and EBIAS bias supply generation.

Board-level features include 3×47µF output capacitance, 3.3µH power inductor (Wurth 74439344033), VIN-to-EN jumper (JP1), test points (TP1–TP4) for SW, VOUT, and phase-node waveforms, and dual 2.54mm header interfaces (J1/J2) for load and input connection.

Key Specifications

Availability

RTKA211450DE0000BU is available at Aetrix Electronics and suitable for industrial power supply validation, automotive body control module prototyping, and embedded system DC/DC subsystem qualification requiring stable component supply and documented layout practices.

Supply support for RTKA211450DE0000BU 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 headquartered in Tokyo, Japan, specializing in microcontrollers, analog power devices, and embedded solutions for industrial, automotive, and infrastructure markets.

The RTKA211450DE0000BU belongs to Renesas' Power Management Evaluation Board portfolio, developed to accelerate adoption of their RAA211450 synchronous buck regulators in high-reliability, wide-input-voltage applications.

FAQ

What is the primary function of the RTKA211450DE0000BU evaluation board?

The RTKA211450DE0000BU evaluation board is a fully assembled reference design that validates the operational performance of the RAA211450GNP#HA0 synchronous buck regulator. It enables engineers to measure efficiency, load regulation, output ripple, startup behavior, and protection features under real-world conditions without custom PCB development. The board includes all necessary passives, test points, and configuration jumpers to evaluate the RTKA211450DE0000BU's target IC across its full 4.5V–42V input range.

Can the output voltage of the RTKA211450DE0000BU be adjusted, and how?

Yes, the output voltage of the RTKA211450DE0000BU can be adjusted from the default 3.3V by modifying the feedback resistor divider formed by R9 and R10. Equation 1 in the manual defines V_OUT = 0.8V × (1 + R9/R10); with R10 fixed at 20kΩ, selecting R9 (e.g., 62kΩ yields ~3.3V) allows precise tuning. The board includes solder pads and DNP placeholders to support alternate resistor values without redesign.

Does the RTKA211450DE0000BU support enable and power-good signaling?

Yes, the RTKA211450DE0000BU supports both EN (enable) and PG (power-good) functionality. JP1 shorts VIN to EN for automatic startup; EN can also be driven externally. PG is routed to J1 pin 2 and provides an open-drain signal indicating regulated output. This allows system-level sequencing and fault monitoring - critical for multi-rail power architectures using the RTKA211450DE0000BU as a primary 3.3V supply.

What layout resources accompany the RTKA211450DE0000BU evaluation board?

The RTKA211450DE0000BU evaluation board manual includes full Gerber files (top/bottom layers, inner planes), detailed schematic (Figure 4), bill of materials with manufacturer part numbers, and layout guidelines referencing the RAA211450 datasheet. These resources provide a proven copper layout for thermal management, EMI reduction, and high-current path routing - directly transferable to production designs using the same RAA211450GNP#HA0 IC evaluated by the RTKA211450DE0000BU.

Is the RTKA211450DE0000BU compatible with other RAA211450 package variants?

No - the RTKA211450DE0000BU is specifically designed for the RAA211450GNP#HA0 QFN version. While the underlying RAA211450 device family shares electrical specifications across packages, this board's footprint, thermal pad layout, and component placement are optimized for the 20-pin QFN package only. Renesas offers separate evaluation boards for other variants; the RTKA211450DE0000BU does not support SOIC or other封装 forms.